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/vmThread.hpp"
52 #include "runtime/vmOperations.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)("Adjust method info dictionary");
171 SystemDictionaryShared::adjust_method_info_dictionary();
172
173 log_info(cds)("Make training data shareable");
174 make_training_data_shareable();
175
176 relocate_to_requested();
177
178 write_archive(serialized_data);
179 release_header();
180 DynamicArchive::post_dump();
181
182 post_dump();
183
184 assert(_num_dump_regions_used == _total_dump_regions, "must be");
185 verify_universe("After CDS dynamic dump");
186 }
187
188 virtual void iterate_roots(MetaspaceClosure* it) {
189 FileMapInfo::metaspace_pointers_do(it);
190 SystemDictionaryShared::dumptime_classes_do(it);
191 TrainingData::iterate_roots(it);
192 iterate_primitive_array_klasses(it);
193 }
194
195 void iterate_primitive_array_klasses(MetaspaceClosure* it) {
196 for (int i = T_BOOLEAN; i <= T_LONG; i++) {
197 assert(is_java_primitive((BasicType)i), "sanity");
198 Klass* k = Universe::typeArrayKlass((BasicType)i); // this give you "[I", etc
199 assert(MetaspaceShared::is_shared_static((void*)k),
200 "one-dimensional primitive array should be in static archive");
201 ArrayKlass* ak = ArrayKlass::cast(k);
202 while (ak != nullptr && ak->is_shared()) {
203 Klass* next_k = ak->array_klass_or_null();
204 if (next_k != nullptr) {
205 ak = ArrayKlass::cast(next_k);
206 } else {
207 ak = nullptr;
208 }
209 }
210 if (ak != nullptr) {
211 assert(ak->dimension() > 1, "sanity");
212 // this is the lowest dimension that's not in the static archive
213 it->push(&ak);
214 }
215 }
216 }
217 };
218
219 void DynamicArchiveBuilder::init_header() {
220 FileMapInfo* mapinfo = new FileMapInfo(_archive_name, false);
221 assert(FileMapInfo::dynamic_info() == mapinfo, "must be");
222 FileMapInfo* base_info = FileMapInfo::current_info();
223 // header only be available after populate_header
224 mapinfo->populate_header(base_info->core_region_alignment());
225 _header = mapinfo->dynamic_header();
226
227 _header->set_base_header_crc(base_info->crc());
228 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
229 _header->set_base_region_crc(i, base_info->region_crc(i));
230 }
231 }
232
233 void DynamicArchiveBuilder::release_header() {
234 // We temporarily allocated a dynamic FileMapInfo for dumping, which makes it appear we
235 // have mapped a dynamic archive, but we actually have not. We are in a safepoint now.
236 // Let's free it so that if class loading happens after we leave the safepoint, nothing
237 // bad will happen.
238 assert(SafepointSynchronize::is_at_safepoint(), "must be");
239 FileMapInfo *mapinfo = FileMapInfo::dynamic_info();
240 assert(mapinfo != nullptr && _header == mapinfo->dynamic_header(), "must be");
241 delete mapinfo;
242 assert(!DynamicArchive::is_mapped(), "must be");
243 _header = nullptr;
244 }
245
246 void DynamicArchiveBuilder::post_dump() {
247 ArchivePtrMarker::reset_map_and_vs();
248 AOTClassLinker::dispose();
249 }
250
251 void DynamicArchiveBuilder::sort_methods() {
252 InstanceKlass::disable_method_binary_search();
253 for (int i = 0; i < klasses()->length(); i++) {
254 Klass* k = get_buffered_addr(klasses()->at(i));
255 if (k->is_instance_klass()) {
256 sort_methods(InstanceKlass::cast(k));
257 }
258 }
259 }
260
261 // The address order of the copied Symbols may be different than when the original
262 // klasses were created. Re-sort all the tables. See Method::sort_methods().
263 void DynamicArchiveBuilder::sort_methods(InstanceKlass* ik) const {
264 assert(ik != nullptr, "DynamicArchiveBuilder currently doesn't support dumping the base archive");
265 if (MetaspaceShared::is_in_shared_metaspace(ik)) {
266 // We have reached a supertype that's already in the base archive
267 return;
268 }
269 assert(is_in_buffer_space(ik), "method sorting must be done on buffered class, not original class");
270 if (ik->java_mirror() == nullptr) {
271 // null mirror means this class has already been visited and methods are already sorted
272 return;
273 }
274 ik->remove_java_mirror();
275
276 if (log_is_enabled(Debug, cds, dynamic)) {
277 ResourceMark rm;
278 log_debug(cds, dynamic)("sorting methods for " PTR_FORMAT " (" PTR_FORMAT ") %s",
279 p2i(ik), p2i(to_requested(ik)), ik->external_name());
280 }
281
282 // Method sorting may re-layout the [iv]tables, which would change the offset(s)
283 // of the locations in an InstanceKlass that would contain pointers. Let's clear
284 // all the existing pointer marking bits, and re-mark the pointers after sorting.
285 remark_pointers_for_instance_klass(ik, false);
286
287 // Make sure all supertypes have been sorted
288 sort_methods(ik->java_super());
289 Array<InstanceKlass*>* interfaces = ik->local_interfaces();
290 int len = interfaces->length();
291 for (int i = 0; i < len; i++) {
292 sort_methods(interfaces->at(i));
293 }
294
295 #ifdef ASSERT
296 if (ik->methods() != nullptr) {
297 for (int m = 0; m < ik->methods()->length(); m++) {
298 Symbol* name = ik->methods()->at(m)->name();
299 assert(MetaspaceShared::is_in_shared_metaspace(name) || is_in_buffer_space(name), "must be");
300 }
301 }
302 if (ik->default_methods() != nullptr) {
303 for (int m = 0; m < ik->default_methods()->length(); m++) {
304 Symbol* name = ik->default_methods()->at(m)->name();
305 assert(MetaspaceShared::is_in_shared_metaspace(name) || is_in_buffer_space(name), "must be");
306 }
307 }
308 #endif
309
310 Method::sort_methods(ik->methods(), /*set_idnums=*/true, dynamic_dump_method_comparator);
311 if (ik->default_methods() != nullptr) {
312 Method::sort_methods(ik->default_methods(), /*set_idnums=*/false, dynamic_dump_method_comparator);
313 }
314 if (ik->is_linked()) {
315 // If the class has already been linked, we must relayout the i/v tables, whose order depends
316 // on the method sorting order.
317 // If the class is unlinked, we cannot layout the i/v tables yet. This is OK, as the
318 // i/v tables will be initialized at runtime after bytecode verification.
319 ik->vtable().initialize_vtable();
320 ik->itable().initialize_itable();
321 }
322
323 // Set all the pointer marking bits after sorting.
324 remark_pointers_for_instance_klass(ik, true);
325 }
326
327 template<bool should_mark>
328 class PointerRemarker: public MetaspaceClosure {
329 public:
330 virtual bool do_ref(Ref* ref, bool read_only) {
331 if (should_mark) {
332 ArchivePtrMarker::mark_pointer(ref->addr());
333 } else {
334 ArchivePtrMarker::clear_pointer(ref->addr());
335 }
336 return false; // don't recurse
337 }
338 };
339
340 void DynamicArchiveBuilder::remark_pointers_for_instance_klass(InstanceKlass* k, bool should_mark) const {
341 if (should_mark) {
342 PointerRemarker<true> marker;
343 k->metaspace_pointers_do(&marker);
344 marker.finish();
345 } else {
346 PointerRemarker<false> marker;
347 k->metaspace_pointers_do(&marker);
348 marker.finish();
349 }
350 }
351
352 void DynamicArchiveBuilder::write_archive(char* serialized_data) {
353 _header->set_shared_path_table(FileMapInfo::shared_path_table().table());
354 _header->set_serialized_data(serialized_data);
355
356 FileMapInfo* dynamic_info = FileMapInfo::dynamic_info();
357 assert(dynamic_info != nullptr, "Sanity");
358
359 dynamic_info->open_for_write();
360 ArchiveHeapInfo no_heap_for_dynamic_dump;
361 ArchiveBuilder::write_archive(dynamic_info, &no_heap_for_dynamic_dump);
362
363 address base = _requested_dynamic_archive_bottom;
364 address top = _requested_dynamic_archive_top;
365 size_t file_size = pointer_delta(top, base, sizeof(char));
366
367 log_info(cds, dynamic)("Written dynamic archive " PTR_FORMAT " - " PTR_FORMAT
368 " [" UINT32_FORMAT " bytes header, " SIZE_FORMAT " bytes total]",
369 p2i(base), p2i(top), _header->header_size(), file_size);
370
371 log_info(cds, dynamic)("%d klasses; %d symbols", klasses()->length(), symbols()->length());
372 }
373
374 void DynamicArchiveBuilder::gather_array_klasses() {
375 for (int i = 0; i < klasses()->length(); i++) {
376 if (klasses()->at(i)->is_objArray_klass()) {
377 ObjArrayKlass* oak = ObjArrayKlass::cast(klasses()->at(i));
378 Klass* elem = oak->element_klass();
379 if (MetaspaceShared::is_shared_static(elem)) {
380 // Only capture the array klass whose element_klass is in the static archive.
381 // During run time, setup (see DynamicArchive::setup_array_klasses()) is needed
382 // so that the element_klass can find its array klasses from the dynamic archive.
383 DynamicArchive::append_array_klass(oak);
384 } else {
385 // The element_klass and its array klasses are in the same archive.
386 assert(!MetaspaceShared::is_shared_static(oak),
387 "we should not gather klasses that are already in the static archive");
388 }
389 }
390 }
391 log_debug(cds)("Total array klasses gathered for dynamic archive: %d", DynamicArchive::num_array_klasses());
392 }
393
394 class VM_PopulateDynamicDumpSharedSpace: public VM_GC_Sync_Operation {
395 DynamicArchiveBuilder _builder;
396 public:
397 VM_PopulateDynamicDumpSharedSpace(const char* archive_name)
398 : VM_GC_Sync_Operation(), _builder(archive_name) {}
399 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
400 void doit() {
401 ResourceMark rm;
402 if (AllowArchivingWithJavaAgent) {
403 log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
404 "for testing purposes only and should not be used in a production environment");
405 }
406 FileMapInfo::check_nonempty_dir_in_shared_path_table();
407
408 _builder.doit();
409 }
410 ~VM_PopulateDynamicDumpSharedSpace() {
411 RegeneratedClasses::cleanup();
412 }
413 };
414
415 // _array_klasses and _dynamic_archive_array_klasses only hold the array klasses
416 // which have element klass in the static archive.
417 GrowableArray<ObjArrayKlass*>* DynamicArchive::_array_klasses = nullptr;
418 Array<ObjArrayKlass*>* DynamicArchive::_dynamic_archive_array_klasses = nullptr;
419
420 void DynamicArchive::append_array_klass(ObjArrayKlass* ak) {
421 if (_array_klasses == nullptr) {
422 _array_klasses = new (mtClassShared) GrowableArray<ObjArrayKlass*>(50, mtClassShared);
423 }
424 _array_klasses->append(ak);
425 }
426
427 void DynamicArchive::dump_array_klasses() {
428 assert(CDSConfig::is_dumping_dynamic_archive(), "sanity");
429 if (_array_klasses != nullptr) {
430 ArchiveBuilder* builder = ArchiveBuilder::current();
431 int num_array_klasses = _array_klasses->length();
432 _dynamic_archive_array_klasses =
433 ArchiveBuilder::new_ro_array<ObjArrayKlass*>(num_array_klasses);
434 for (int i = 0; i < num_array_klasses; i++) {
435 builder->write_pointer_in_buffer(_dynamic_archive_array_klasses->adr_at(i), _array_klasses->at(i));
436 }
437 }
438 }
439
440 void DynamicArchive::setup_array_klasses() {
441 if (_dynamic_archive_array_klasses != nullptr) {
442 for (int i = 0; i < _dynamic_archive_array_klasses->length(); i++) {
443 ObjArrayKlass* oak = _dynamic_archive_array_klasses->at(i);
444 assert(!oak->is_typeArray_klass(), "all type array classes must be in static archive");
445
446 Klass* elm = oak->element_klass();
447 assert(MetaspaceShared::is_shared_static((void*)elm), "must be");
448
449 if (elm->is_instance_klass()) {
450 assert(InstanceKlass::cast(elm)->array_klasses() == nullptr, "must be");
451 InstanceKlass::cast(elm)->set_array_klasses(oak);
452 } else {
453 assert(elm->is_array_klass(), "sanity");
454 assert(ArrayKlass::cast(elm)->higher_dimension() == nullptr, "must be");
455 ArrayKlass::cast(elm)->set_higher_dimension(oak);
456 }
457 }
458 log_debug(cds)("Total array klasses read from dynamic archive: %d", _dynamic_archive_array_klasses->length());
459 }
460 }
461
462 void DynamicArchive::serialize_array_klasses(SerializeClosure* soc) {
463 soc->do_ptr(&_dynamic_archive_array_klasses);
464 }
465
466 void DynamicArchive::make_array_klasses_shareable() {
467 if (_array_klasses != nullptr) {
468 int num_array_klasses = _array_klasses->length();
469 for (int i = 0; i < num_array_klasses; i++) {
470 ObjArrayKlass* k = ArchiveBuilder::current()->get_buffered_addr(_array_klasses->at(i));
471 k->remove_unshareable_info();
472 }
473 }
474 }
475
476 void DynamicArchive::post_dump() {
477 if (_array_klasses != nullptr) {
478 delete _array_klasses;
479 _array_klasses = nullptr;
480 }
481 }
482
483 int DynamicArchive::num_array_klasses() {
484 return _array_klasses != nullptr ? _array_klasses->length() : 0;
485 }
486
487 void DynamicArchive::check_for_dynamic_dump() {
488 if (CDSConfig::is_dumping_dynamic_archive() && !CDSConfig::is_using_archive()) {
489 // This could happen if SharedArchiveFile has failed to load:
490 // - -Xshare:off was specified
491 // - SharedArchiveFile points to an non-existent file.
492 // - SharedArchiveFile points to an archive that has failed CRC check
493 // - SharedArchiveFile is not specified and the VM doesn't have a compatible default archive
494
495 #define __THEMSG " is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info."
496 if (RecordDynamicDumpInfo) {
497 log_error(cds)("-XX:+RecordDynamicDumpInfo%s", __THEMSG);
498 MetaspaceShared::unrecoverable_loading_error();
499 } else {
500 assert(ArchiveClassesAtExit != nullptr, "sanity");
501 log_warning(cds)("-XX:ArchiveClassesAtExit" __THEMSG);
502 }
503 #undef __THEMSG
504 CDSConfig::disable_dumping_dynamic_archive();
505 }
506 }
507
508 void DynamicArchive::dump_at_exit(JavaThread* current, const char* archive_name) {
509 ExceptionMark em(current);
510 ResourceMark rm(current);
511
512 if (!CDSConfig::is_dumping_dynamic_archive() || archive_name == nullptr) {
513 return;
514 }
515
516 log_info(cds, dynamic)("Preparing for dynamic dump at exit in thread %s", current->name());
517
518 JavaThread* THREAD = current; // For TRAPS processing related to link_shared_classes
519
520 {
521 // FIXME-HACK - make sure we have at least one class in the dynamic archive
522 TempNewSymbol class_name = SymbolTable::new_symbol("sun/nio/cs/IBM850"); // unusual class; shouldn't be used by our tests cases.
523 SystemDictionary::resolve_or_null(class_name, Handle(), Handle(), THREAD);
524 guarantee(!HAS_PENDING_EXCEPTION, "must have this class");
525 }
526
527 MetaspaceShared::link_shared_classes(false/*not from jcmd*/, THREAD);
528 if (!HAS_PENDING_EXCEPTION) {
529 // copy shared path table to saved.
530 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
531 if (!HAS_PENDING_EXCEPTION) {
532 VM_PopulateDynamicDumpSharedSpace op(archive_name);
533 VMThread::execute(&op);
534 return;
535 }
536 }
537
538 // One of the prepatory steps failed
539 oop ex = current->pending_exception();
540 log_error(cds)("Dynamic dump has failed");
541 log_error(cds)("%s: %s", ex->klass()->external_name(),
542 java_lang_String::as_utf8_string(java_lang_Throwable::message(ex)));
543 CLEAR_PENDING_EXCEPTION;
544 CDSConfig::disable_dumping_dynamic_archive(); // Just for good measure
545 }
546
547 // This is called by "jcmd VM.cds dynamic_dump"
548 void DynamicArchive::dump_for_jcmd(const char* archive_name, TRAPS) {
549 assert(CDSConfig::is_using_archive() && RecordDynamicDumpInfo, "already checked in arguments.cpp");
550 assert(ArchiveClassesAtExit == nullptr, "already checked in arguments.cpp");
551 assert(CDSConfig::is_dumping_dynamic_archive(), "already checked by check_for_dynamic_dump() during VM startup");
552 MetaspaceShared::link_shared_classes(true/*from jcmd*/, CHECK);
553 // copy shared path table to saved.
554 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
555 VM_PopulateDynamicDumpSharedSpace op(archive_name);
556 VMThread::execute(&op);
557 }
558
559 bool DynamicArchive::validate(FileMapInfo* dynamic_info) {
560 assert(!dynamic_info->is_static(), "must be");
561 // Check if the recorded base archive matches with the current one
562 FileMapInfo* base_info = FileMapInfo::current_info();
563 DynamicArchiveHeader* dynamic_header = dynamic_info->dynamic_header();
564
565 // Check the header crc
566 if (dynamic_header->base_header_crc() != base_info->crc()) {
567 log_warning(cds)("Dynamic archive cannot be used: static archive header checksum verification failed.");
568 return false;
569 }
570
571 // Check each space's crc
572 for (int i = 0; i < MetaspaceShared::n_regions; i++) {
573 if (dynamic_header->base_region_crc(i) != base_info->region_crc(i)) {
574 log_warning(cds)("Dynamic archive cannot be used: static archive region #%d checksum verification failed.", i);
575 return false;
576 }
577 }
578
579 return true;
580 }
581
582 void DynamicArchiveHeader::print(outputStream* st) {
583 ResourceMark rm;
584
585 st->print_cr("- base_header_crc: 0x%08x", base_header_crc());
586 for (int i = 0; i < NUM_CDS_REGIONS; i++) {
587 st->print_cr("- base_region_crc[%d]: 0x%08x", i, base_region_crc(i));
588 }
589 }