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/archiveHeapLoader.hpp"
28 #include "cds/archiveHeapWriter.hpp"
29 #include "cds/cds_globals.hpp"
30 #include "cds/cdsConfig.hpp"
31 #include "cds/cdsProtectionDomain.hpp"
32 #include "cds/cds_globals.hpp"
33 #include "cds/classListParser.hpp"
34 #include "cds/classListWriter.hpp"
35 #include "cds/classPrelinker.hpp"
36 #include "cds/cppVtables.hpp"
37 #include "cds/dumpAllocStats.hpp"
38 #include "cds/dynamicArchive.hpp"
39 #include "cds/filemap.hpp"
40 #include "cds/heapShared.hpp"
41 #include "cds/lambdaFormInvokers.hpp"
42 #include "cds/metaspaceShared.hpp"
43 #include "classfile/classLoaderDataGraph.hpp"
44 #include "classfile/classLoaderDataShared.hpp"
45 #include "classfile/classLoaderExt.hpp"
46 #include "classfile/javaClasses.inline.hpp"
47 #include "classfile/loaderConstraints.hpp"
48 #include "classfile/modules.hpp"
49 #include "classfile/placeholders.hpp"
50 #include "classfile/stringTable.hpp"
51 #include "classfile/symbolTable.hpp"
52 #include "classfile/systemDictionary.hpp"
53 #include "classfile/systemDictionaryShared.hpp"
54 #include "classfile/vmClasses.hpp"
55 #include "classfile/vmSymbols.hpp"
56 #include "code/codeCache.hpp"
57 #include "gc/shared/gcVMOperations.hpp"
58 #include "interpreter/bytecodeStream.hpp"
59 #include "interpreter/bytecodes.hpp"
60 #include "jvm_io.h"
61 #include "logging/log.hpp"
62 #include "logging/logMessage.hpp"
63 #include "logging/logStream.hpp"
64 #include "memory/metaspace.hpp"
65 #include "memory/metaspaceClosure.hpp"
66 #include "memory/resourceArea.hpp"
67 #include "memory/universe.hpp"
68 #include "nmt/memTracker.hpp"
69 #include "oops/compressedKlass.hpp"
70 #include "oops/instanceMirrorKlass.hpp"
71 #include "oops/klass.inline.hpp"
72 #include "oops/objArrayOop.hpp"
73 #include "oops/oop.inline.hpp"
74 #include "oops/oopHandle.hpp"
75 #include "prims/jvmtiExport.hpp"
76 #include "runtime/arguments.hpp"
77 #include "runtime/globals.hpp"
78 #include "runtime/globals_extension.hpp"
79 #include "runtime/handles.inline.hpp"
80 #include "runtime/os.inline.hpp"
81 #include "runtime/safepointVerifiers.hpp"
82 #include "runtime/sharedRuntime.hpp"
83 #include "runtime/vmOperations.hpp"
84 #include "runtime/vmThread.hpp"
85 #include "sanitizers/leak.hpp"
86 #include "utilities/align.hpp"
87 #include "utilities/bitMap.inline.hpp"
88 #include "utilities/defaultStream.hpp"
89 #include "utilities/ostream.hpp"
90 #include "utilities/resourceHash.hpp"
91
92 ReservedSpace MetaspaceShared::_symbol_rs;
93 VirtualSpace MetaspaceShared::_symbol_vs;
94 bool MetaspaceShared::_archive_loading_failed = false;
95 bool MetaspaceShared::_remapped_readwrite = false;
96 void* MetaspaceShared::_shared_metaspace_static_top = nullptr;
97 intx MetaspaceShared::_relocation_delta;
98 char* MetaspaceShared::_requested_base_address;
99 bool MetaspaceShared::_use_optimized_module_handling = true;
100
101 // The CDS archive is divided into the following regions:
102 // rw - read-write metadata
103 // ro - read-only metadata and read-only tables
104 // hp - heap region
105 // bm - bitmap for relocating the above 7 regions.
106 //
107 // The rw and ro regions are linearly allocated, in the order of rw->ro.
108 // These regions are aligned with MetaspaceShared::core_region_alignment().
109 //
110 // These 2 regions are populated in the following steps:
111 // [0] All classes are loaded in MetaspaceShared::preload_classes(). All metadata are
112 // temporarily allocated outside of the shared regions.
113 // [1] We enter a safepoint and allocate a buffer for the rw/ro regions.
114 // [2] C++ vtables are copied into the rw region.
115 // [3] ArchiveBuilder copies RW metadata into the rw region.
116 // [4] ArchiveBuilder copies RO metadata into the ro region.
117 // [5] SymbolTable, StringTable, SystemDictionary, and a few other read-only data
118 // are copied into the ro region as read-only tables.
282 if (UseSharedSpaces) {
283 int size = FileMapInfo::get_number_of_shared_paths();
284 if (size > 0) {
285 CDSProtectionDomain::allocate_shared_data_arrays(size, CHECK);
286 if (!CDSConfig::is_dumping_dynamic_archive()) {
287 FileMapInfo* info;
288 if (FileMapInfo::dynamic_info() == nullptr) {
289 info = FileMapInfo::current_info();
290 } else {
291 info = FileMapInfo::dynamic_info();
292 }
293 ClassLoaderExt::init_paths_start_index(info->app_class_paths_start_index());
294 ClassLoaderExt::init_app_module_paths_start_index(info->app_module_paths_start_index());
295 }
296 }
297 }
298 }
299
300 static GrowableArrayCHeap<OopHandle, mtClassShared>* _extra_interned_strings = nullptr;
301 static GrowableArrayCHeap<Symbol*, mtClassShared>* _extra_symbols = nullptr;
302
303 void MetaspaceShared::read_extra_data(JavaThread* current, const char* filename) {
304 _extra_interned_strings = new GrowableArrayCHeap<OopHandle, mtClassShared>(10000);
305 _extra_symbols = new GrowableArrayCHeap<Symbol*, mtClassShared>(1000);
306
307 HashtableTextDump reader(filename);
308 reader.check_version("VERSION: 1.0");
309
310 while (reader.remain() > 0) {
311 int utf8_length;
312 int prefix_type = reader.scan_prefix(&utf8_length);
313 ResourceMark rm(current);
314 if (utf8_length == 0x7fffffff) {
315 // buf_len will overflown 32-bit value.
316 log_error(cds)("string length too large: %d", utf8_length);
317 MetaspaceShared::unrecoverable_loading_error();
318 }
319 int buf_len = utf8_length+1;
320 char* utf8_buffer = NEW_RESOURCE_ARRAY(char, buf_len);
321 reader.get_utf8(utf8_buffer, utf8_length);
332 if (HAS_PENDING_EXCEPTION) {
333 log_warning(cds, heap)("[line %d] extra interned string allocation failed; size too large: %d",
334 reader.last_line_no(), utf8_length);
335 CLEAR_PENDING_EXCEPTION;
336 } else {
337 #if INCLUDE_CDS_JAVA_HEAP
338 if (ArchiveHeapWriter::is_string_too_large_to_archive(str)) {
339 log_warning(cds, heap)("[line %d] extra interned string ignored; size too large: %d",
340 reader.last_line_no(), utf8_length);
341 continue;
342 }
343 // Make sure this string is included in the dumped interned string table.
344 assert(str != nullptr, "must succeed");
345 _extra_interned_strings->append(OopHandle(Universe::vm_global(), str));
346 #endif
347 }
348 }
349 }
350 }
351
352 // Read/write a data stream for restoring/preserving metadata pointers and
353 // miscellaneous data from/to the shared archive file.
354
355 void MetaspaceShared::serialize(SerializeClosure* soc) {
356 int tag = 0;
357 soc->do_tag(--tag);
358
359 // Verify the sizes of various metadata in the system.
360 soc->do_tag(sizeof(Method));
361 soc->do_tag(sizeof(ConstMethod));
362 soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
363 soc->do_tag(sizeof(ConstantPool));
364 soc->do_tag(sizeof(ConstantPoolCache));
365 soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
366 soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
367 soc->do_tag(sizeof(Symbol));
368
369 // Need to do this first, as subsequent steps may call virtual functions
370 // in archived Metadata objects.
371 CppVtables::serialize(soc);
372 soc->do_tag(--tag);
373
374 // Dump/restore miscellaneous metadata.
375 JavaClasses::serialize_offsets(soc);
376 Universe::serialize(soc);
377 soc->do_tag(--tag);
378
379 // Dump/restore references to commonly used names and signatures.
380 vmSymbols::serialize(soc);
381 soc->do_tag(--tag);
382
383 // Dump/restore the symbol/string/subgraph_info tables
384 SymbolTable::serialize_shared_table_header(soc);
385 StringTable::serialize_shared_table_header(soc);
386 HeapShared::serialize_tables(soc);
387 SystemDictionaryShared::serialize_dictionary_headers(soc);
388
389 InstanceMirrorKlass::serialize_offsets(soc);
390
391 // Dump/restore well known classes (pointers)
392 SystemDictionaryShared::serialize_vm_classes(soc);
393 soc->do_tag(--tag);
394
395 CDS_JAVA_HEAP_ONLY(Modules::serialize(soc);)
396 CDS_JAVA_HEAP_ONLY(ClassLoaderDataShared::serialize(soc);)
397
398 LambdaFormInvokers::serialize(soc);
399 soc->do_tag(666);
400 }
401
402 static void rewrite_nofast_bytecode(const methodHandle& method) {
403 BytecodeStream bcs(method);
404 while (!bcs.is_last_bytecode()) {
405 Bytecodes::Code opcode = bcs.next();
406 switch (opcode) {
407 case Bytecodes::_getfield: *bcs.bcp() = Bytecodes::_nofast_getfield; break;
408 case Bytecodes::_putfield: *bcs.bcp() = Bytecodes::_nofast_putfield; break;
409 case Bytecodes::_aload_0: *bcs.bcp() = Bytecodes::_nofast_aload_0; break;
410 case Bytecodes::_iload: {
411 if (!bcs.is_wide()) {
412 *bcs.bcp() = Bytecodes::_nofast_iload;
413 }
414 break;
415 }
416 default: break;
419 }
420
421 // [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
422 // at run time by RewriteBytecodes/RewriteFrequentPairs
423 // [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
424 void MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
425 for (int i = 0; i < ik->methods()->length(); i++) {
426 methodHandle m(thread, ik->methods()->at(i));
427 if (ik->can_be_verified_at_dumptime() && ik->is_linked()) {
428 rewrite_nofast_bytecode(m);
429 }
430 Fingerprinter fp(m);
431 // The side effect of this call sets method's fingerprint field.
432 fp.fingerprint();
433 }
434 }
435
436 class VM_PopulateDumpSharedSpace : public VM_Operation {
437 private:
438 ArchiveHeapInfo _heap_info;
439
440 void dump_java_heap_objects(GrowableArray<Klass*>* klasses) NOT_CDS_JAVA_HEAP_RETURN;
441 void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
442 log_info(cds)("Dumping symbol table ...");
443 SymbolTable::write_to_archive(symbols);
444 }
445 char* dump_read_only_tables();
446
447 public:
448
449 VM_PopulateDumpSharedSpace() : VM_Operation(), _heap_info() {}
450
451 bool skip_operation() const { return false; }
452
453 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
454 void doit(); // outline because gdb sucks
455 bool allow_nested_vm_operations() const { return true; }
456 }; // class VM_PopulateDumpSharedSpace
457
458 class StaticArchiveBuilder : public ArchiveBuilder {
459 public:
460 StaticArchiveBuilder() : ArchiveBuilder() {}
461
462 virtual void iterate_roots(MetaspaceClosure* it) {
463 FileMapInfo::metaspace_pointers_do(it);
464 SystemDictionaryShared::dumptime_classes_do(it);
465 Universe::metaspace_pointers_do(it);
466 vmSymbols::metaspace_pointers_do(it);
467
468 // The above code should find all the symbols that are referenced by the
469 // archived classes. We just need to add the extra symbols which
470 // may not be used by any of the archived classes -- these are usually
471 // symbols that we anticipate to be used at run time, so we can store
472 // them in the RO region, to be shared across multiple processes.
473 if (_extra_symbols != nullptr) {
474 for (int i = 0; i < _extra_symbols->length(); i++) {
475 it->push(_extra_symbols->adr_at(i));
476 }
477 }
478 }
479 };
480
481 char* VM_PopulateDumpSharedSpace::dump_read_only_tables() {
482 ArchiveBuilder::OtherROAllocMark mark;
483
484 SystemDictionaryShared::write_to_archive();
485
486 // Write lambform lines into archive
487 LambdaFormInvokers::dump_static_archive_invokers();
488 // Write module name into archive
489 CDS_JAVA_HEAP_ONLY(Modules::dump_main_module_name();)
490 // Write the other data to the output array.
491 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
492 char* start = ro_region->top();
493 WriteClosure wc(ro_region);
494 MetaspaceShared::serialize(&wc);
495
496 return start;
497 }
498
499 void VM_PopulateDumpSharedSpace::doit() {
500 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
501
502 FileMapInfo::check_nonempty_dir_in_shared_path_table();
503
504 NOT_PRODUCT(SystemDictionary::verify();)
505
506 // Block concurrent class unloading from changing the _dumptime_table
507 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
508 SystemDictionaryShared::check_excluded_classes();
509
510 StaticArchiveBuilder builder;
511 builder.gather_source_objs();
512 builder.reserve_buffer();
513
514 CppVtables::dumptime_init(&builder);
515
516 builder.sort_metadata_objs();
517 builder.dump_rw_metadata();
518 builder.dump_ro_metadata();
519 builder.relocate_metaspaceobj_embedded_pointers();
520
521 dump_java_heap_objects(builder.klasses());
522 dump_shared_symbol_table(builder.symbols());
523
524 log_info(cds)("Make classes shareable");
525 builder.make_klasses_shareable();
526
527 char* serialized_data = dump_read_only_tables();
528
529 SystemDictionaryShared::adjust_lambda_proxy_class_dictionary();
530
531 // The vtable clones contain addresses of the current process.
532 // We don't want to write these addresses into the archive.
533 CppVtables::zero_archived_vtables();
534
535 // relocate the data so that it can be mapped to MetaspaceShared::requested_base_address()
536 // without runtime relocation.
537 builder.relocate_to_requested();
538
539 // Write the archive file
540 const char* static_archive = CDSConfig::static_archive_path();
541 assert(static_archive != nullptr, "SharedArchiveFile not set?");
542 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
543 mapinfo->populate_header(MetaspaceShared::core_region_alignment());
544 mapinfo->set_serialized_data(serialized_data);
545 mapinfo->set_cloned_vtables(CppVtables::vtables_serialized_base());
546 mapinfo->open_for_write();
547 builder.write_archive(mapinfo, &_heap_info);
548
549 if (PrintSystemDictionaryAtExit) {
550 SystemDictionary::print();
551 }
552
553 if (AllowArchivingWithJavaAgent) {
554 log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
555 "for testing purposes only and should not be used in a production environment");
556 }
557 }
558
559 class CollectCLDClosure : public CLDClosure {
560 GrowableArray<ClassLoaderData*> _loaded_cld;
561 GrowableArray<OopHandle> _loaded_cld_handles; // keep the CLDs alive
562 Thread* _current_thread;
563 public:
564 CollectCLDClosure(Thread* thread) : _current_thread(thread) {}
565 ~CollectCLDClosure() {
566 for (int i = 0; i < _loaded_cld_handles.length(); i++) {
567 _loaded_cld_handles.at(i).release(Universe::vm_global());
568 }
569 }
570 void do_cld(ClassLoaderData* cld) {
571 assert(cld->is_alive(), "must be");
572 _loaded_cld.append(cld);
573 _loaded_cld_handles.append(OopHandle(Universe::vm_global(), cld->holder()));
574 }
575
576 int nof_cld() const { return _loaded_cld.length(); }
577 ClassLoaderData* cld_at(int index) { return _loaded_cld.at(index); }
578 };
579
580 // Check if we can eagerly link this class at dump time, so we can avoid the
581 // runtime linking overhead (especially verification)
582 bool MetaspaceShared::may_be_eagerly_linked(InstanceKlass* ik) {
583 if (!ik->can_be_verified_at_dumptime()) {
584 // For old classes, try to leave them in the unlinked state, so
585 // we can still store them in the archive. They must be
586 // linked/verified at runtime.
587 return false;
588 }
589 if (CDSConfig::is_dumping_dynamic_archive() && ik->is_shared_unregistered_class()) {
590 // Linking of unregistered classes at this stage may cause more
591 // classes to be resolved, resulting in calls to ClassLoader.loadClass()
592 // that may not be expected by custom class loaders.
593 //
594 // It's OK to do this for the built-in loaders as we know they can
595 // tolerate this.
596 return false;
597 }
598 return true;
599 }
600
601 bool MetaspaceShared::link_class_for_cds(InstanceKlass* ik, TRAPS) {
602 // Link the class to cause the bytecodes to be rewritten and the
603 // cpcache to be created. Class verification is done according
604 // to -Xverify setting.
605 bool res = MetaspaceShared::try_link_class(THREAD, ik);
606 ClassPrelinker::dumptime_resolve_constants(ik, CHECK_(false));
607 return res;
608 }
609
610 void MetaspaceShared::link_shared_classes(bool jcmd_request, TRAPS) {
611 ClassPrelinker::initialize();
612
613 if (!jcmd_request) {
614 LambdaFormInvokers::regenerate_holder_classes(CHECK);
615 }
616
617 // Collect all loaded ClassLoaderData.
618 CollectCLDClosure collect_cld(THREAD);
619 {
620 // ClassLoaderDataGraph::loaded_cld_do requires ClassLoaderDataGraph_lock.
621 // We cannot link the classes while holding this lock (or else we may run into deadlock).
622 // Therefore, we need to first collect all the CLDs, and then link their classes after
623 // releasing the lock.
624 MutexLocker lock(ClassLoaderDataGraph_lock);
625 ClassLoaderDataGraph::loaded_cld_do(&collect_cld);
626 }
627
628 while (true) {
629 bool has_linked = false;
630 for (int i = 0; i < collect_cld.nof_cld(); i++) {
631 ClassLoaderData* cld = collect_cld.cld_at(i);
632 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
633 if (klass->is_instance_klass()) {
634 InstanceKlass* ik = InstanceKlass::cast(klass);
635 if (may_be_eagerly_linked(ik)) {
636 has_linked |= link_class_for_cds(ik, CHECK);
637 }
638 }
639 }
640 }
641
642 if (!has_linked) {
643 break;
644 }
645 // Class linking includes verification which may load more classes.
646 // Keep scanning until we have linked no more classes.
647 }
648 }
649
650 void MetaspaceShared::prepare_for_dumping() {
651 assert(CDSConfig::is_dumping_archive(), "sanity");
652 CDSConfig::check_unsupported_dumping_module_options();
653 ClassLoader::initialize_shared_path(JavaThread::current());
654 }
655
656 // Preload classes from a list, populate the shared spaces and dump to a
657 // file.
658 void MetaspaceShared::preload_and_dump() {
659 EXCEPTION_MARK;
660 ResourceMark rm(THREAD);
661 preload_and_dump_impl(THREAD);
662 if (HAS_PENDING_EXCEPTION) {
663 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
664 log_error(cds)("Out of memory. Please run with a larger Java heap, current MaxHeapSize = "
665 SIZE_FORMAT "M", MaxHeapSize/M);
666 CLEAR_PENDING_EXCEPTION;
667 MetaspaceShared::unrecoverable_writing_error();
668 } else {
669 log_error(cds)("%s: %s", PENDING_EXCEPTION->klass()->external_name(),
670 java_lang_String::as_utf8_string(java_lang_Throwable::message(PENDING_EXCEPTION)));
671 CLEAR_PENDING_EXCEPTION;
672 MetaspaceShared::unrecoverable_writing_error("VM exits due to exception, use -Xlog:cds,exceptions=trace for detail");
673 }
674 }
675 }
676
677 #if INCLUDE_CDS_JAVA_HEAP && defined(_LP64)
678 void MetaspaceShared::adjust_heap_sizes_for_dumping() {
679 if (!CDSConfig::is_dumping_heap() || UseCompressedOops) {
680 return;
681 }
743 ClassListParser::parse_classlist(ExtraSharedClassListFile,
744 ClassListParser::_parse_all, CHECK);
745 }
746 if (classlist_path != default_classlist) {
747 struct stat statbuf;
748 if (os::stat(default_classlist, &statbuf) == 0) {
749 // File exists, let's use it.
750 ClassListParser::parse_classlist(default_classlist,
751 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
752 }
753 }
754
755 // Exercise the manifest processing code to ensure classes used by CDS at runtime
756 // are always archived
757 const char* dummy = "Manifest-Version: 1.0\n";
758 CDSProtectionDomain::create_jar_manifest(dummy, strlen(dummy), CHECK);
759
760 log_info(cds)("Loading classes to share: done.");
761 }
762
763 void MetaspaceShared::preload_and_dump_impl(TRAPS) {
764 preload_classes(CHECK);
765
766 if (SharedArchiveConfigFile) {
767 log_info(cds)("Reading extra data from %s ...", SharedArchiveConfigFile);
768 read_extra_data(THREAD, SharedArchiveConfigFile);
769 log_info(cds)("Reading extra data: done.");
770 }
771
772 // Rewrite and link classes
773 log_info(cds)("Rewriting and linking classes ...");
774
775 // Link any classes which got missed. This would happen if we have loaded classes that
776 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K
777 // fails verification, all other interfaces that were not specified in the classlist but
778 // are implemented by K are not verified.
779 link_shared_classes(false/*not from jcmd*/, CHECK);
780 log_info(cds)("Rewriting and linking classes: done");
781
782 #if INCLUDE_CDS_JAVA_HEAP
783 if (CDSConfig::is_dumping_heap()) {
784 if (!HeapShared::is_archived_boot_layer_available(THREAD)) {
785 log_info(cds)("archivedBootLayer not available, disabling full module graph");
786 CDSConfig::stop_dumping_full_module_graph();
787 }
788 HeapShared::init_for_dumping(CHECK);
789 ArchiveHeapWriter::init();
790 if (CDSConfig::is_dumping_full_module_graph()) {
791 HeapShared::reset_archived_object_states(CHECK);
792 }
793
794 // Do this at the very end, when no Java code will be executed. Otherwise
795 // some new strings may be added to the intern table.
796 StringTable::allocate_shared_strings_array(CHECK);
797 }
798 #endif
799
800 VM_PopulateDumpSharedSpace op;
801 VMThread::execute(&op);
802 }
803
804 // Returns true if the class's status has changed.
805 bool MetaspaceShared::try_link_class(JavaThread* current, InstanceKlass* ik) {
806 ExceptionMark em(current);
807 JavaThread* THREAD = current; // For exception macros.
808 assert(CDSConfig::is_dumping_archive(), "sanity");
809 if (!ik->is_shared() && ik->is_loaded() && !ik->is_linked() && ik->can_be_verified_at_dumptime() &&
810 !SystemDictionaryShared::has_class_failed_verification(ik)) {
811 bool saved = BytecodeVerificationLocal;
812 if (ik->is_shared_unregistered_class() && ik->class_loader() == nullptr) {
813 // The verification decision is based on BytecodeVerificationRemote
814 // for non-system classes. Since we are using the null classloader
815 // to load non-system classes for customized class loaders during dumping,
816 // we need to temporarily change BytecodeVerificationLocal to be the same as
817 // BytecodeVerificationRemote. Note this can cause the parent system
818 // classes also being verified. The extra overhead is acceptable during
819 // dumping.
820 BytecodeVerificationLocal = BytecodeVerificationRemote;
821 }
822 ik->link_class(THREAD);
823 if (HAS_PENDING_EXCEPTION) {
824 ResourceMark rm(THREAD);
825 log_warning(cds)("Preload Warning: Verification failed for %s",
826 ik->external_name());
827 CLEAR_PENDING_EXCEPTION;
828 SystemDictionaryShared::set_class_has_failed_verification(ik);
829 }
830 ik->compute_has_loops_flag_for_methods();
831 BytecodeVerificationLocal = saved;
832 return true;
833 } else {
834 return false;
835 }
836 }
837
838 #if INCLUDE_CDS_JAVA_HEAP
839 void VM_PopulateDumpSharedSpace::dump_java_heap_objects(GrowableArray<Klass*>* klasses) {
840 if(!HeapShared::can_write()) {
841 log_info(cds)(
842 "Archived java heap is not supported as UseG1GC "
843 "and UseCompressedClassPointers are required."
844 "Current settings: UseG1GC=%s, UseCompressedClassPointers=%s.",
845 BOOL_TO_STR(UseG1GC), BOOL_TO_STR(UseCompressedClassPointers));
846 return;
847 }
848 // Find all the interned strings that should be dumped.
849 int i;
850 for (i = 0; i < klasses->length(); i++) {
851 Klass* k = klasses->at(i);
852 if (k->is_instance_klass()) {
853 InstanceKlass* ik = InstanceKlass::cast(k);
854 if (ik->is_linked()) {
855 ik->constants()->add_dumped_interned_strings();
856 }
857 }
858 }
859 if (_extra_interned_strings != nullptr) {
860 for (i = 0; i < _extra_interned_strings->length(); i ++) {
861 OopHandle string = _extra_interned_strings->at(i);
862 HeapShared::add_to_dumped_interned_strings(string.resolve());
863 }
864 }
865
902 if (message != nullptr) {
903 log_error(cds)("%s", message);
904 }
905 vm_exit_during_initialization("Unable to use shared archive.", nullptr);
906 }
907
908 // This function is called when the JVM is unable to write the specified CDS archive due to an
909 // unrecoverable error.
910 void MetaspaceShared::unrecoverable_writing_error(const char* message) {
911 log_error(cds)("An error has occurred while writing the shared archive file.");
912 if (message != nullptr) {
913 log_error(cds)("%s", message);
914 }
915 vm_direct_exit(1);
916 }
917
918 void MetaspaceShared::initialize_runtime_shared_and_meta_spaces() {
919 assert(UseSharedSpaces, "Must be called when UseSharedSpaces is enabled");
920 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
921
922 FileMapInfo* static_mapinfo = open_static_archive();
923 FileMapInfo* dynamic_mapinfo = nullptr;
924
925 if (static_mapinfo != nullptr) {
926 log_info(cds)("Core region alignment: " SIZE_FORMAT, static_mapinfo->core_region_alignment());
927 dynamic_mapinfo = open_dynamic_archive();
928
929 // First try to map at the requested address
930 result = map_archives(static_mapinfo, dynamic_mapinfo, true);
931 if (result == MAP_ARCHIVE_MMAP_FAILURE) {
932 // Mapping has failed (probably due to ASLR). Let's map at an address chosen
933 // by the OS.
934 log_info(cds)("Try to map archive(s) at an alternative address");
935 result = map_archives(static_mapinfo, dynamic_mapinfo, false);
936 }
937 }
938
939 if (result == MAP_ARCHIVE_SUCCESS) {
940 bool dynamic_mapped = (dynamic_mapinfo != nullptr && dynamic_mapinfo->is_mapped());
941 char* cds_base = static_mapinfo->mapped_base();
942 char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
949 FileMapInfo::set_shared_path_table(dynamic_mapinfo);
950 // turn AutoCreateSharedArchive off if successfully mapped
951 AutoCreateSharedArchive = false;
952 } else {
953 FileMapInfo::set_shared_path_table(static_mapinfo);
954 }
955 } else {
956 set_shared_metaspace_range(nullptr, nullptr, nullptr);
957 if (CDSConfig::is_dumping_dynamic_archive()) {
958 log_warning(cds)("-XX:ArchiveClassesAtExit is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
959 }
960 UseSharedSpaces = false;
961 // The base archive cannot be mapped. We cannot dump the dynamic shared archive.
962 AutoCreateSharedArchive = false;
963 CDSConfig::disable_dumping_dynamic_archive();
964 log_info(cds)("Unable to map shared spaces");
965 if (PrintSharedArchiveAndExit) {
966 MetaspaceShared::unrecoverable_loading_error("Unable to use shared archive.");
967 } else if (RequireSharedSpaces) {
968 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
969 }
970 }
971
972 // If mapping failed and -XShare:on, the vm should exit
973 bool has_failed = false;
974 if (static_mapinfo != nullptr && !static_mapinfo->is_mapped()) {
975 has_failed = true;
976 delete static_mapinfo;
977 }
978 if (dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped()) {
979 has_failed = true;
980 delete dynamic_mapinfo;
981 }
982 if (RequireSharedSpaces && has_failed) {
983 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
984 }
985 }
986
987 FileMapInfo* MetaspaceShared::open_static_archive() {
988 const char* static_archive = CDSConfig::static_archive_path();
989 assert(static_archive != nullptr, "sanity");
990 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
991 if (!mapinfo->initialize()) {
992 delete(mapinfo);
993 return nullptr;
994 }
995 return mapinfo;
996 }
997
998 FileMapInfo* MetaspaceShared::open_dynamic_archive() {
999 if (CDSConfig::is_dumping_dynamic_archive()) {
1000 return nullptr;
1001 }
1002 const char* dynamic_archive = CDSConfig::dynamic_archive_path();
1003 if (dynamic_archive == nullptr) {
1004 return nullptr;
1005 }
1006
1007 FileMapInfo* mapinfo = new FileMapInfo(dynamic_archive, false);
1008 if (!mapinfo->initialize()) {
1009 delete(mapinfo);
1010 if (RequireSharedSpaces) {
1011 MetaspaceShared::unrecoverable_loading_error("Failed to initialize dynamic archive");
1012 }
1013 return nullptr;
1014 }
1015 return mapinfo;
1385 if (archive_space_rs.is_reserved()) {
1386 log_debug(cds)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
1387 archive_space_rs.release();
1388 }
1389 if (class_space_rs.is_reserved()) {
1390 log_debug(cds)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
1391 class_space_rs.release();
1392 }
1393 }
1394 }
1395
1396 static int archive_regions[] = { MetaspaceShared::rw, MetaspaceShared::ro };
1397 static int archive_regions_count = 2;
1398
1399 MapArchiveResult MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
1400 assert(UseSharedSpaces, "must be runtime");
1401 if (mapinfo == nullptr) {
1402 return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
1403 }
1404
1405 mapinfo->set_is_mapped(false);
1406 if (mapinfo->core_region_alignment() != (size_t)core_region_alignment()) {
1407 log_info(cds)("Unable to map CDS archive -- core_region_alignment() expected: " SIZE_FORMAT
1408 " actual: " SIZE_FORMAT, mapinfo->core_region_alignment(), core_region_alignment());
1409 return MAP_ARCHIVE_OTHER_FAILURE;
1410 }
1411
1412 MapArchiveResult result =
1413 mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
1414
1415 if (result != MAP_ARCHIVE_SUCCESS) {
1416 unmap_archive(mapinfo);
1417 return result;
1418 }
1419
1420 if (!mapinfo->validate_shared_path_table()) {
1421 unmap_archive(mapinfo);
1422 return MAP_ARCHIVE_OTHER_FAILURE;
1423 }
1424
1449 };
1450
1451 // Read the miscellaneous data from the shared file, and
1452 // serialize it out to its various destinations.
1453
1454 void MetaspaceShared::initialize_shared_spaces() {
1455 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
1456
1457 // Verify various attributes of the archive, plus initialize the
1458 // shared string/symbol tables.
1459 char* buffer = static_mapinfo->serialized_data();
1460 intptr_t* array = (intptr_t*)buffer;
1461 ReadClosure rc(&array);
1462 serialize(&rc);
1463
1464 // Finish up archived heap initialization. These must be
1465 // done after ReadClosure.
1466 static_mapinfo->patch_heap_embedded_pointers();
1467 ArchiveHeapLoader::finish_initialization();
1468 Universe::load_archived_object_instances();
1469
1470 // Close the mapinfo file
1471 static_mapinfo->close();
1472
1473 static_mapinfo->unmap_region(MetaspaceShared::bm);
1474
1475 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
1476 if (dynamic_mapinfo != nullptr) {
1477 intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
1478 ReadClosure rc(&buffer);
1479 ArchiveBuilder::serialize_dynamic_archivable_items(&rc);
1480 DynamicArchive::setup_array_klasses();
1481 dynamic_mapinfo->close();
1482 dynamic_mapinfo->unmap_region(MetaspaceShared::bm);
1483 }
1484
1485 // Set up LambdaFormInvokers::_lambdaform_lines for dynamic dump
1486 if (CDSConfig::is_dumping_dynamic_archive()) {
1487 // Read stored LF format lines stored in static archive
1488 LambdaFormInvokers::read_static_archive_invokers();
1489 }
1490
1491 if (PrintSharedArchiveAndExit) {
1492 // Print archive names
1493 if (dynamic_mapinfo != nullptr) {
1494 tty->print_cr("\n\nBase archive name: %s", CDSConfig::static_archive_path());
1495 tty->print_cr("Base archive version %d", static_mapinfo->version());
1496 } else {
1497 tty->print_cr("Static archive name: %s", static_mapinfo->full_path());
1498 tty->print_cr("Static archive version %d", static_mapinfo->version());
1499 }
1500
1501 SystemDictionaryShared::print_shared_archive(tty);
1502 if (dynamic_mapinfo != nullptr) {
1503 tty->print_cr("\n\nDynamic archive name: %s", dynamic_mapinfo->full_path());
1504 tty->print_cr("Dynamic archive version %d", dynamic_mapinfo->version());
1505 SystemDictionaryShared::print_shared_archive(tty, false/*dynamic*/);
1506 }
1507
1508 // collect shared symbols and strings
1509 CountSharedSymbols cl;
1510 SymbolTable::shared_symbols_do(&cl);
1511 tty->print_cr("Number of shared symbols: %d", cl.total());
1512 tty->print_cr("Number of shared strings: %zu", StringTable::shared_entry_count());
1513 tty->print_cr("VM version: %s\r\n", static_mapinfo->vm_version());
1514 if (FileMapInfo::current_info() == nullptr || _archive_loading_failed) {
1515 tty->print_cr("archive is invalid");
1516 vm_exit(1);
1517 } else {
1518 tty->print_cr("archive is valid");
1519 vm_exit(0);
1520 }
1521 }
1522 }
1523
1524 // JVM/TI RedefineClasses() support:
1525 bool MetaspaceShared::remap_shared_readonly_as_readwrite() {
1526 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
|
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/archiveHeapLoader.hpp"
28 #include "cds/archiveHeapWriter.hpp"
29 #include "cds/cds_globals.hpp"
30 #include "cds/cdsAccess.hpp"
31 #include "cds/cdsConfig.hpp"
32 #include "cds/cdsProtectionDomain.hpp"
33 #include "cds/cds_globals.hpp"
34 #include "cds/classListParser.hpp"
35 #include "cds/classListWriter.hpp"
36 #include "cds/classPreinitializer.hpp"
37 #include "cds/classPrelinker.hpp"
38 #include "cds/classPreloader.hpp"
39 #include "cds/cppVtables.hpp"
40 #include "cds/dumpAllocStats.hpp"
41 #include "cds/dynamicArchive.hpp"
42 #include "cds/filemap.hpp"
43 #include "cds/finalImageRecipes.hpp"
44 #include "cds/heapShared.hpp"
45 #include "cds/lambdaFormInvokers.hpp"
46 #include "cds/metaspaceShared.hpp"
47 #include "classfile/classLoaderDataGraph.hpp"
48 #include "classfile/classLoaderDataShared.hpp"
49 #include "classfile/classLoaderExt.hpp"
50 #include "classfile/javaClasses.inline.hpp"
51 #include "classfile/loaderConstraints.hpp"
52 #include "classfile/modules.hpp"
53 #include "classfile/placeholders.hpp"
54 #include "classfile/stringTable.hpp"
55 #include "classfile/symbolTable.hpp"
56 #include "classfile/systemDictionary.hpp"
57 #include "classfile/systemDictionaryShared.hpp"
58 #include "classfile/vmClasses.hpp"
59 #include "classfile/vmSymbols.hpp"
60 #include "code/codeCache.hpp"
61 #include "code/SCCache.hpp"
62 #include "compiler/compileBroker.hpp"
63 #include "compiler/precompiler.hpp"
64 #include "gc/shared/gcVMOperations.hpp"
65 #include "interpreter/bytecodeStream.hpp"
66 #include "interpreter/bytecodes.hpp"
67 #include "jvm_io.h"
68 #include "logging/log.hpp"
69 #include "logging/logMessage.hpp"
70 #include "logging/logStream.hpp"
71 #include "memory/metaspace.hpp"
72 #include "memory/metaspaceClosure.hpp"
73 #include "memory/resourceArea.hpp"
74 #include "memory/universe.hpp"
75 #include "nmt/memTracker.hpp"
76 #include "oops/compressedKlass.hpp"
77 #include "oops/instanceMirrorKlass.hpp"
78 #include "oops/klass.inline.hpp"
79 #include "oops/method.inline.hpp"
80 #include "oops/objArrayOop.hpp"
81 #include "oops/oop.inline.hpp"
82 #include "oops/oopHandle.hpp"
83 #include "oops/trainingData.hpp"
84 #include "prims/jvmtiExport.hpp"
85 #include "prims/whitebox.hpp"
86 #include "runtime/arguments.hpp"
87 #include "runtime/globals.hpp"
88 #include "runtime/globals_extension.hpp"
89 #include "runtime/handles.inline.hpp"
90 #include "runtime/javaCalls.hpp"
91 #include "runtime/os.inline.hpp"
92 #include "runtime/safepointVerifiers.hpp"
93 #include "runtime/sharedRuntime.hpp"
94 #include "runtime/vmOperations.hpp"
95 #include "runtime/vmThread.hpp"
96 #include "sanitizers/leak.hpp"
97 #include "utilities/align.hpp"
98 #include "utilities/bitMap.inline.hpp"
99 #include "utilities/defaultStream.hpp"
100 #include "utilities/ostream.hpp"
101 #include "utilities/resourceHash.hpp"
102
103 ReservedSpace MetaspaceShared::_symbol_rs;
104 VirtualSpace MetaspaceShared::_symbol_vs;
105 bool MetaspaceShared::_archive_loading_failed = false;
106 bool MetaspaceShared::_remapped_readwrite = false;
107 void* MetaspaceShared::_shared_metaspace_static_top = nullptr;
108 intx MetaspaceShared::_relocation_delta;
109 char* MetaspaceShared::_requested_base_address;
110 Array<Method*>* MetaspaceShared::_archived_method_handle_intrinsics = nullptr;
111 bool MetaspaceShared::_use_optimized_module_handling = true;
112
113 // The CDS archive is divided into the following regions:
114 // rw - read-write metadata
115 // ro - read-only metadata and read-only tables
116 // hp - heap region
117 // bm - bitmap for relocating the above 7 regions.
118 //
119 // The rw and ro regions are linearly allocated, in the order of rw->ro.
120 // These regions are aligned with MetaspaceShared::core_region_alignment().
121 //
122 // These 2 regions are populated in the following steps:
123 // [0] All classes are loaded in MetaspaceShared::preload_classes(). All metadata are
124 // temporarily allocated outside of the shared regions.
125 // [1] We enter a safepoint and allocate a buffer for the rw/ro regions.
126 // [2] C++ vtables are copied into the rw region.
127 // [3] ArchiveBuilder copies RW metadata into the rw region.
128 // [4] ArchiveBuilder copies RO metadata into the ro region.
129 // [5] SymbolTable, StringTable, SystemDictionary, and a few other read-only data
130 // are copied into the ro region as read-only tables.
294 if (UseSharedSpaces) {
295 int size = FileMapInfo::get_number_of_shared_paths();
296 if (size > 0) {
297 CDSProtectionDomain::allocate_shared_data_arrays(size, CHECK);
298 if (!CDSConfig::is_dumping_dynamic_archive()) {
299 FileMapInfo* info;
300 if (FileMapInfo::dynamic_info() == nullptr) {
301 info = FileMapInfo::current_info();
302 } else {
303 info = FileMapInfo::dynamic_info();
304 }
305 ClassLoaderExt::init_paths_start_index(info->app_class_paths_start_index());
306 ClassLoaderExt::init_app_module_paths_start_index(info->app_module_paths_start_index());
307 }
308 }
309 }
310 }
311
312 static GrowableArrayCHeap<OopHandle, mtClassShared>* _extra_interned_strings = nullptr;
313 static GrowableArrayCHeap<Symbol*, mtClassShared>* _extra_symbols = nullptr;
314 static GrowableArray<Method*>* _method_handle_intrinsics = nullptr;
315
316 void MetaspaceShared::read_extra_data(JavaThread* current, const char* filename) {
317 _extra_interned_strings = new GrowableArrayCHeap<OopHandle, mtClassShared>(10000);
318 _extra_symbols = new GrowableArrayCHeap<Symbol*, mtClassShared>(1000);
319
320 HashtableTextDump reader(filename);
321 reader.check_version("VERSION: 1.0");
322
323 while (reader.remain() > 0) {
324 int utf8_length;
325 int prefix_type = reader.scan_prefix(&utf8_length);
326 ResourceMark rm(current);
327 if (utf8_length == 0x7fffffff) {
328 // buf_len will overflown 32-bit value.
329 log_error(cds)("string length too large: %d", utf8_length);
330 MetaspaceShared::unrecoverable_loading_error();
331 }
332 int buf_len = utf8_length+1;
333 char* utf8_buffer = NEW_RESOURCE_ARRAY(char, buf_len);
334 reader.get_utf8(utf8_buffer, utf8_length);
345 if (HAS_PENDING_EXCEPTION) {
346 log_warning(cds, heap)("[line %d] extra interned string allocation failed; size too large: %d",
347 reader.last_line_no(), utf8_length);
348 CLEAR_PENDING_EXCEPTION;
349 } else {
350 #if INCLUDE_CDS_JAVA_HEAP
351 if (ArchiveHeapWriter::is_string_too_large_to_archive(str)) {
352 log_warning(cds, heap)("[line %d] extra interned string ignored; size too large: %d",
353 reader.last_line_no(), utf8_length);
354 continue;
355 }
356 // Make sure this string is included in the dumped interned string table.
357 assert(str != nullptr, "must succeed");
358 _extra_interned_strings->append(OopHandle(Universe::vm_global(), str));
359 #endif
360 }
361 }
362 }
363 }
364
365 void MetaspaceShared::make_method_handle_intrinsics_shareable() {
366 for (int i = 0; i < _method_handle_intrinsics->length(); i++) {
367 Method* m = ArchiveBuilder::current()->get_buffered_addr(_method_handle_intrinsics->at(i));
368 m->remove_unshareable_info();
369 // Each method has its own constant pool (which is distinct from m->method_holder()->constants());
370 m->constants()->remove_unshareable_info();
371 }
372 }
373
374 void MetaspaceShared::write_method_handle_intrinsics() {
375 int len = _method_handle_intrinsics->length();
376 _archived_method_handle_intrinsics = ArchiveBuilder::new_ro_array<Method*>(len);
377 for (int i = 0; i < len; i++) {
378 ArchiveBuilder::current()->write_pointer_in_buffer(_archived_method_handle_intrinsics->adr_at(i),
379 _method_handle_intrinsics->at(i));
380 }
381 log_info(cds)("Archived %d method handle intrinsics", len);
382 }
383
384 // Read/write a data stream for restoring/preserving metadata pointers and
385 // miscellaneous data from/to the shared archive file.
386
387 void MetaspaceShared::serialize(SerializeClosure* soc) {
388 int tag = 0;
389 soc->do_tag(--tag);
390
391 // Verify the sizes of various metadata in the system.
392 soc->do_tag(sizeof(Method));
393 soc->do_tag(sizeof(ConstMethod));
394 soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
395 soc->do_tag(sizeof(ConstantPool));
396 soc->do_tag(sizeof(ConstantPoolCache));
397 soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
398 soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
399 soc->do_tag(sizeof(Symbol));
400
401 // Need to do this first, as subsequent steps may call virtual functions
402 // in archived Metadata objects.
403 CppVtables::serialize(soc);
404 soc->do_tag(--tag);
405
406 // Dump/restore miscellaneous metadata.
407 JavaClasses::serialize_offsets(soc);
408 HeapShared::serialize_misc_info(soc);
409 Universe::serialize(soc);
410 soc->do_tag(--tag);
411
412 // Dump/restore references to commonly used names and signatures.
413 vmSymbols::serialize(soc);
414 soc->do_tag(--tag);
415
416 // Dump/restore the symbol/string/subgraph_info tables
417 SymbolTable::serialize_shared_table_header(soc);
418 StringTable::serialize_shared_table_header(soc);
419 HeapShared::serialize_tables(soc);
420 SystemDictionaryShared::serialize_dictionary_headers(soc);
421 ClassPreloader::serialize(soc, true);
422 FinalImageRecipes::serialize(soc, true);
423 TrainingData::serialize_training_data(soc);
424 InstanceMirrorKlass::serialize_offsets(soc);
425
426 // Dump/restore well known classes (pointers)
427 SystemDictionaryShared::serialize_vm_classes(soc);
428 soc->do_tag(--tag);
429
430 CDS_JAVA_HEAP_ONLY(Modules::serialize(soc);)
431 CDS_JAVA_HEAP_ONLY(ClassLoaderDataShared::serialize(soc);)
432 soc->do_ptr((void**)&_archived_method_handle_intrinsics);
433
434
435 LambdaFormInvokers::serialize(soc);
436 soc->do_tag(666);
437 }
438
439 static void rewrite_nofast_bytecode(const methodHandle& method) {
440 BytecodeStream bcs(method);
441 while (!bcs.is_last_bytecode()) {
442 Bytecodes::Code opcode = bcs.next();
443 switch (opcode) {
444 case Bytecodes::_getfield: *bcs.bcp() = Bytecodes::_nofast_getfield; break;
445 case Bytecodes::_putfield: *bcs.bcp() = Bytecodes::_nofast_putfield; break;
446 case Bytecodes::_aload_0: *bcs.bcp() = Bytecodes::_nofast_aload_0; break;
447 case Bytecodes::_iload: {
448 if (!bcs.is_wide()) {
449 *bcs.bcp() = Bytecodes::_nofast_iload;
450 }
451 break;
452 }
453 default: break;
456 }
457
458 // [1] Rewrite all bytecodes as needed, so that the ConstMethod* will not be modified
459 // at run time by RewriteBytecodes/RewriteFrequentPairs
460 // [2] Assign a fingerprint, so one doesn't need to be assigned at run-time.
461 void MetaspaceShared::rewrite_nofast_bytecodes_and_calculate_fingerprints(Thread* thread, InstanceKlass* ik) {
462 for (int i = 0; i < ik->methods()->length(); i++) {
463 methodHandle m(thread, ik->methods()->at(i));
464 if (ik->can_be_verified_at_dumptime() && ik->is_linked()) {
465 rewrite_nofast_bytecode(m);
466 }
467 Fingerprinter fp(m);
468 // The side effect of this call sets method's fingerprint field.
469 fp.fingerprint();
470 }
471 }
472
473 class VM_PopulateDumpSharedSpace : public VM_Operation {
474 private:
475 ArchiveHeapInfo _heap_info;
476 void dump_java_heap_objects(GrowableArray<Klass*>* klasses) NOT_CDS_JAVA_HEAP_RETURN;
477 void dump_shared_symbol_table(GrowableArray<Symbol*>* symbols) {
478 log_info(cds)("Dumping symbol table ...");
479 SymbolTable::write_to_archive(symbols);
480 }
481 char* dump_read_only_tables();
482 StaticArchiveBuilder& _builder;
483 FileMapInfo* _mapinfo;
484 public:
485
486 VM_PopulateDumpSharedSpace(StaticArchiveBuilder& b) :
487 VM_Operation(), _heap_info(), _builder(b), _mapinfo(nullptr) {}
488
489 bool skip_operation() const { return false; }
490
491 VMOp_Type type() const { return VMOp_PopulateDumpSharedSpace; }
492 void doit(); // outline because gdb sucks
493 bool allow_nested_vm_operations() const { return true; }
494 FileMapInfo* mapinfo() const { return _mapinfo; }
495 ArchiveHeapInfo* heap_info() { return &_heap_info; }
496 }; // class VM_PopulateDumpSharedSpace
497
498 class StaticArchiveBuilder : public ArchiveBuilder {
499 public:
500 StaticArchiveBuilder() : ArchiveBuilder() {}
501
502 virtual void iterate_roots(MetaspaceClosure* it) {
503 FileMapInfo::metaspace_pointers_do(it);
504 SystemDictionaryShared::dumptime_classes_do(it);
505 Universe::metaspace_pointers_do(it);
506 vmSymbols::metaspace_pointers_do(it);
507 TrainingData::iterate_roots(it);
508
509 // The above code should find all the symbols that are referenced by the
510 // archived classes. We just need to add the extra symbols which
511 // may not be used by any of the archived classes -- these are usually
512 // symbols that we anticipate to be used at run time, so we can store
513 // them in the RO region, to be shared across multiple processes.
514 if (_extra_symbols != nullptr) {
515 for (int i = 0; i < _extra_symbols->length(); i++) {
516 it->push(_extra_symbols->adr_at(i));
517 }
518 }
519
520 for (int i = 0; i < _method_handle_intrinsics->length(); i++) {
521 it->push(_method_handle_intrinsics->adr_at(i));
522 }
523 }
524 };
525
526 char* VM_PopulateDumpSharedSpace::dump_read_only_tables() {
527 ArchiveBuilder::OtherROAllocMark mark;
528
529 SystemDictionaryShared::write_to_archive();
530 ClassPreloader::record_initiated_classes(true);
531 ClassPreloader::record_unregistered_classes();
532 TrainingData::dump_training_data();
533 MetaspaceShared::write_method_handle_intrinsics();
534
535 // Write lambform lines into archive
536 LambdaFormInvokers::dump_static_archive_invokers();
537 // Write module name into archive
538 CDS_JAVA_HEAP_ONLY(Modules::dump_main_module_name();)
539 // Write the other data to the output array.
540 DumpRegion* ro_region = ArchiveBuilder::current()->ro_region();
541 char* start = ro_region->top();
542 WriteClosure wc(ro_region);
543 MetaspaceShared::serialize(&wc);
544
545 return start;
546 }
547
548 void VM_PopulateDumpSharedSpace::doit() {
549 DEBUG_ONLY(SystemDictionaryShared::NoClassLoadingMark nclm);
550
551 FileMapInfo::check_nonempty_dir_in_shared_path_table();
552
553 NOT_PRODUCT(SystemDictionary::verify();)
554
555 // Block concurrent class unloading from changing the _dumptime_table
556 MutexLocker ml(DumpTimeTable_lock, Mutex::_no_safepoint_check_flag);
557 SystemDictionaryShared::check_excluded_classes();
558
559 _builder.gather_source_objs();
560 _builder.reserve_buffer();
561
562 CppVtables::dumptime_init(&_builder);
563
564 _builder.sort_metadata_objs();
565 _builder.dump_rw_metadata();
566 _builder.dump_ro_metadata();
567 _builder.relocate_metaspaceobj_embedded_pointers();
568
569 dump_java_heap_objects(_builder.klasses());
570 dump_shared_symbol_table(_builder.symbols());
571
572 {
573 ArchiveBuilder::OtherROAllocMark mark;
574 ClassPreloader::record_preloaded_classes(true);
575 if (CDSConfig::is_dumping_preimage_static_archive()) {
576 FinalImageRecipes::record_recipes();
577 }
578 }
579
580 log_info(cds)("Make classes shareable");
581 _builder.make_klasses_shareable();
582 MetaspaceShared::make_method_handle_intrinsics_shareable();
583
584 char* serialized_data = dump_read_only_tables();
585
586 SystemDictionaryShared::adjust_lambda_proxy_class_dictionary();
587
588 log_info(cds)("Adjust method info dictionary");
589 SystemDictionaryShared::adjust_method_info_dictionary();
590
591 log_info(cds)("Make training data shareable");
592 _builder.make_training_data_shareable();
593
594 // The vtable clones contain addresses of the current process.
595 // We don't want to write these addresses into the archive.
596 CppVtables::zero_archived_vtables();
597
598 // Write the archive file
599 const char* static_archive;
600 if (CDSConfig::is_dumping_final_static_archive()) {
601 static_archive = CacheDataStore;
602 assert(FileMapInfo::current_info() != nullptr, "sanity");
603 delete FileMapInfo::current_info();
604 } else {
605 static_archive = CDSConfig::static_archive_path();
606 }
607 assert(static_archive != nullptr, "SharedArchiveFile not set?");
608 _mapinfo = new FileMapInfo(static_archive, true);
609 _mapinfo->populate_header(MetaspaceShared::core_region_alignment());
610 _mapinfo->set_serialized_data(serialized_data);
611 _mapinfo->set_cloned_vtables(CppVtables::vtables_serialized_base());
612 }
613
614 class CollectCLDClosure : public CLDClosure {
615 GrowableArray<ClassLoaderData*> _loaded_cld;
616 GrowableArray<OopHandle> _loaded_cld_handles; // keep the CLDs alive
617 Thread* _current_thread;
618 public:
619 CollectCLDClosure(Thread* thread) : _current_thread(thread) {}
620 ~CollectCLDClosure() {
621 for (int i = 0; i < _loaded_cld_handles.length(); i++) {
622 _loaded_cld_handles.at(i).release(Universe::vm_global());
623 }
624 }
625 void do_cld(ClassLoaderData* cld) {
626 assert(cld->is_alive(), "must be");
627 _loaded_cld.append(cld);
628 _loaded_cld_handles.append(OopHandle(Universe::vm_global(), cld->holder()));
629 }
630
631 int nof_cld() const { return _loaded_cld.length(); }
632 ClassLoaderData* cld_at(int index) { return _loaded_cld.at(index); }
633 };
634
635 // Check if we can eagerly link this class at dump time, so we can avoid the
636 // runtime linking overhead (especially verification)
637 bool MetaspaceShared::may_be_eagerly_linked(InstanceKlass* ik) {
638 if (CDSConfig::preserve_all_dumptime_verification_states(ik)) {
639 assert(ik->can_be_verified_at_dumptime(), "sanity");
640 }
641 if (!ik->can_be_verified_at_dumptime()) {
642 // For old classes, try to leave them in the unlinked state, so
643 // we can still store them in the archive. They must be
644 // linked/verified at runtime.
645 return false;
646 }
647
648 if (CDSConfig::is_dumping_dynamic_archive() && ik->is_shared_unregistered_class()) {
649 // Linking of unregistered classes at this stage may cause more
650 // classes to be resolved, resulting in calls to ClassLoader.loadClass()
651 // that may not be expected by custom class loaders.
652 //
653 // It's OK to do this for the built-in loaders as we know they can
654 // tolerate this.
655 return false;
656 }
657 return true;
658 }
659
660 void MetaspaceShared::link_shared_classes(bool jcmd_request, TRAPS) {
661 ClassPreloader::initialize();
662 ClassPrelinker::initialize();
663
664 if (!jcmd_request && !CDSConfig::is_dumping_dynamic_archive()
665 && !CDSConfig::is_dumping_preimage_static_archive()
666 && !CDSConfig::is_dumping_final_static_archive()) {
667 // If we have regenerated invoker classes in the dynamic archive,
668 // they will conflict with the resolved CONSTANT_Klass references that are stored
669 // in the static archive. This is not easy to handle. Let's disable
670 // it for dynamic archive for now.
671 LambdaFormInvokers::regenerate_holder_classes(CHECK);
672 }
673
674 // Collect all loaded ClassLoaderData.
675 CollectCLDClosure collect_cld(THREAD);
676 {
677 // ClassLoaderDataGraph::loaded_cld_do requires ClassLoaderDataGraph_lock.
678 // We cannot link the classes while holding this lock (or else we may run into deadlock).
679 // Therefore, we need to first collect all the CLDs, and then link their classes after
680 // releasing the lock.
681 MutexLocker lock(ClassLoaderDataGraph_lock);
682 ClassLoaderDataGraph::loaded_cld_do(&collect_cld);
683 }
684
685 while (true) {
686 bool has_linked = false;
687 for (int i = 0; i < collect_cld.nof_cld(); i++) {
688 ClassLoaderData* cld = collect_cld.cld_at(i);
689 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
690 if (klass->is_instance_klass()) {
691 InstanceKlass* ik = InstanceKlass::cast(klass);
692 if (may_be_eagerly_linked(ik)) {
693 has_linked |= try_link_class(THREAD, ik);
694 }
695 if (CDSConfig::is_dumping_heap() && ik->is_linked() && !ik->is_initialized()) {
696 ClassPreinitializer::maybe_preinit_class(ik, CHECK);
697 }
698 }
699 }
700 }
701
702 if (!has_linked) {
703 break;
704 }
705 // Class linking includes verification which may load more classes.
706 // Keep scanning until we have linked no more classes.
707 }
708
709 // Resolve constant pool entries -- we don't load any new classes during this stage
710 for (int i = 0; i < collect_cld.nof_cld(); i++) {
711 ClassLoaderData* cld = collect_cld.cld_at(i);
712 for (Klass* klass = cld->klasses(); klass != nullptr; klass = klass->next_link()) {
713 if (klass->is_instance_klass()) {
714 InstanceKlass* ik = InstanceKlass::cast(klass);
715 ClassPrelinker::dumptime_resolve_constants(ik, CHECK);
716 if (CDSConfig::is_dumping_preimage_static_archive()) {
717 FinalImageRecipes::add_reflection_data_flags(ik, CHECK);
718 }
719 }
720 }
721 }
722
723 if (CDSConfig::is_dumping_preimage_static_archive()) {
724 // Do this after all classes are verified by the above loop.
725 // Any classes loaded from here on will be automatically excluded, so
726 // there's no need to force verification or resolve CP entries.
727 RecordTraining = false;
728 SystemDictionaryShared::ignore_new_classes();
729 LambdaFormInvokers::regenerate_holder_classes(CHECK);
730 RecordTraining = true;
731 }
732
733 if (CDSConfig::is_dumping_final_static_archive()) {
734 FinalImageRecipes::apply_recipes(CHECK);
735 }
736 }
737
738 void MetaspaceShared::prepare_for_dumping() {
739 assert(CDSConfig::is_dumping_archive(), "sanity");
740 CDSConfig::check_unsupported_dumping_module_options();
741 ClassLoader::initialize_shared_path(JavaThread::current());
742 }
743
744 // Preload classes from a list, populate the shared spaces and dump to a
745 // file.
746 void MetaspaceShared::preload_and_dump() {
747 EXCEPTION_MARK;
748 ResourceMark rm(THREAD);
749 HandleMark hm(THREAD);
750
751 if (CDSConfig::is_dumping_final_static_archive() && PrintTrainingInfo) {
752 tty->print_cr("==================== archived_training_data ** before dumping ====================");
753 TrainingData::print_archived_training_data_on(tty);
754 }
755
756 StaticArchiveBuilder builder;
757 preload_and_dump_impl(builder, THREAD);
758 if (HAS_PENDING_EXCEPTION) {
759 if (PENDING_EXCEPTION->is_a(vmClasses::OutOfMemoryError_klass())) {
760 log_error(cds)("Out of memory. Please run with a larger Java heap, current MaxHeapSize = "
761 SIZE_FORMAT "M", MaxHeapSize/M);
762 CLEAR_PENDING_EXCEPTION;
763 MetaspaceShared::unrecoverable_writing_error();
764 } else {
765 log_error(cds)("%s: %s", PENDING_EXCEPTION->klass()->external_name(),
766 java_lang_String::as_utf8_string(java_lang_Throwable::message(PENDING_EXCEPTION)));
767 CLEAR_PENDING_EXCEPTION;
768 MetaspaceShared::unrecoverable_writing_error("VM exits due to exception, use -Xlog:cds,exceptions=trace for detail");
769 }
770 }
771 }
772
773 #if INCLUDE_CDS_JAVA_HEAP && defined(_LP64)
774 void MetaspaceShared::adjust_heap_sizes_for_dumping() {
775 if (!CDSConfig::is_dumping_heap() || UseCompressedOops) {
776 return;
777 }
839 ClassListParser::parse_classlist(ExtraSharedClassListFile,
840 ClassListParser::_parse_all, CHECK);
841 }
842 if (classlist_path != default_classlist) {
843 struct stat statbuf;
844 if (os::stat(default_classlist, &statbuf) == 0) {
845 // File exists, let's use it.
846 ClassListParser::parse_classlist(default_classlist,
847 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
848 }
849 }
850
851 // Exercise the manifest processing code to ensure classes used by CDS at runtime
852 // are always archived
853 const char* dummy = "Manifest-Version: 1.0\n";
854 CDSProtectionDomain::create_jar_manifest(dummy, strlen(dummy), CHECK);
855
856 log_info(cds)("Loading classes to share: done.");
857 }
858
859 void MetaspaceShared::preload_and_dump_impl(StaticArchiveBuilder& builder, TRAPS) {
860 if (CDSConfig::is_dumping_classic_static_archive()) {
861 // We are running with -Xshare:dump
862 preload_classes(CHECK);
863
864 if (SharedArchiveConfigFile) {
865 log_info(cds)("Reading extra data from %s ...", SharedArchiveConfigFile);
866 read_extra_data(THREAD, SharedArchiveConfigFile);
867 log_info(cds)("Reading extra data: done.");
868 }
869 }
870
871 if (CDSConfig::is_dumping_preimage_static_archive()) {
872 log_info(cds)("Reading lambda form invokers of in JDK default classlist ...");
873 char default_classlist[JVM_MAXPATHLEN];
874 get_default_classlist(default_classlist, sizeof(default_classlist));
875 struct stat statbuf;
876 if (os::stat(default_classlist, &statbuf) == 0) {
877 ClassListParser::parse_classlist(default_classlist,
878 ClassListParser::_parse_lambda_forms_invokers_only, CHECK);
879 }
880 }
881
882 #if INCLUDE_CDS_JAVA_HEAP
883 if (CDSConfig::is_dumping_heap() && ArchiveInvokeDynamic) {
884 // We also assume no other Java threads are running
885 // This makes sure that the MethodType and MethodTypeForm objects are clean.
886 JavaValue result(T_VOID);
887 JavaCalls::call_static(&result, vmClasses::MethodType_klass(),
888 vmSymbols::dumpSharedArchive(),
889 vmSymbols::void_method_signature(),
890 CHECK);
891 }
892 #endif
893
894 // Rewrite and link classes
895 log_info(cds)("Rewriting and linking classes ...");
896 // Link any classes which got missed. This would happen if we have loaded classes that
897 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K
898 // fails verification, all other interfaces that were not specified in the classlist but
899 // are implemented by K are not verified.
900 link_shared_classes(false/*not from jcmd*/, CHECK);
901 log_info(cds)("Rewriting and linking classes: done");
902
903 if (CDSConfig::is_dumping_final_static_archive()) {
904 assert(RecordTraining == false, "must be");
905 RecordTraining = true;
906 }
907
908 TrainingData::init_dumptime_table(CHECK); // captures TrainingDataSetLocker
909
910 _method_handle_intrinsics = new (mtClassShared) GrowableArray<Method*>(256, mtClassShared);
911 SystemDictionary::get_all_method_handle_intrinsics(_method_handle_intrinsics);
912
913 #if INCLUDE_CDS_JAVA_HEAP
914 if (CDSConfig::is_dumping_heap()) {
915 if (!HeapShared::is_archived_boot_layer_available(THREAD)) {
916 log_info(cds)("archivedBootLayer not available, disabling full module graph");
917 CDSConfig::stop_dumping_full_module_graph();
918 }
919 HeapShared::init_for_dumping(CHECK);
920 ArchiveHeapWriter::init();
921 if (CDSConfig::is_dumping_full_module_graph()) {
922 HeapShared::reset_archived_object_states(CHECK);
923 }
924
925 if (ArchiveLoaderLookupCache) {
926 SystemDictionaryShared::create_loader_positive_lookup_cache(CHECK);
927 }
928
929 // Do this at the very end, when no Java code will be executed. Otherwise
930 // some new strings may be added to the intern table.
931 StringTable::allocate_shared_strings_array(CHECK);
932 }
933 #endif
934
935 VM_PopulateDumpSharedSpace op(builder);
936 VMThread::execute(&op);
937 FileMapInfo* mapinfo = op.mapinfo();
938 ArchiveHeapInfo* heap_info = op.heap_info();
939
940 if (CDSConfig::is_dumping_preimage_static_archive()) {
941 write_static_archive(&builder, mapinfo, heap_info);
942 fork_and_dump_final_static_archive();
943 } else if (CDSConfig::is_dumping_final_static_archive()) {
944 RecordTraining = false;
945 if (StoreCachedCode && CachedCodeFile != nullptr) { // FIXME: new workflow -- remove the CachedCodeFile flag
946 if (log_is_enabled(Info, cds, jit)) {
947 CDSAccess::test_heap_access_api();
948 }
949
950 // We have just created the final image. Let's run the AOT compiler
951 if (PrintTrainingInfo) {
952 tty->print_cr("==================== archived_training_data ** after dumping ====================");
953 TrainingData::print_archived_training_data_on(tty);
954 }
955
956 CDSConfig::enable_dumping_cached_code();
957 {
958 builder.start_cc_region();
959 Precompiler::compile_cached_code(&builder, CHECK);
960 builder.end_cc_region();
961 }
962 CDSConfig::disable_dumping_cached_code();
963
964 SCCache::close(); // Write final data and close archive
965 }
966 write_static_archive(&builder, mapinfo, heap_info);
967 } else {
968 write_static_archive(&builder, mapinfo, heap_info);
969 }
970 }
971
972 void MetaspaceShared::write_static_archive(ArchiveBuilder* builder, FileMapInfo *mapinfo, ArchiveHeapInfo* heap_info) {
973 // relocate the data so that it can be mapped to MetaspaceShared::requested_base_address()
974 // without runtime relocation.
975 builder->relocate_to_requested();
976
977 mapinfo->open_for_write();
978 builder->write_archive(mapinfo, heap_info);
979
980 if (PrintSystemDictionaryAtExit) {
981 SystemDictionary::print();
982 }
983
984 if (AllowArchivingWithJavaAgent) {
985 log_warning(cds)("This archive was created with AllowArchivingWithJavaAgent. It should be used "
986 "for testing purposes only and should not be used in a production environment");
987 }
988 }
989
990 void MetaspaceShared::fork_and_dump_final_static_archive() {
991 assert(CDSConfig::is_dumping_preimage_static_archive(), "sanity");
992
993 ResourceMark rm;
994 stringStream st;
995 st.print("%s%sbin%sjava", Arguments::get_java_home(), os::file_separator(), os::file_separator());
996 const char* cp = Arguments::get_appclasspath();
997 if (cp != nullptr && strlen(cp) > 0 && strcmp(cp, ".") != 0) {
998 st.print(" -cp "); st.print_raw(cp);
999 }
1000 for (int i = 0; i < Arguments::num_jvm_flags(); i++) {
1001 st.print(" %s", Arguments::jvm_flags_array()[i]);
1002 }
1003 for (int i = 0; i < Arguments::num_jvm_args(); i++) {
1004 st.print(" %s", Arguments::jvm_args_array()[i]);
1005 }
1006 st.print(" -XX:CDSPreimage=%s", SharedArchiveFile);
1007
1008 const char* cmd = st.freeze();
1009 if (CDSManualFinalImage) {
1010 tty->print_cr("-XX:+CDSManualFinalImage is specified");
1011 tty->print_cr("Please manually execute the following command to create the final CDS image:");
1012 tty->print(" "); tty->print_raw_cr(cmd);
1013 } else {
1014 log_info(cds)("Launching child process to create final CDS image:");
1015 log_info(cds)(" %s", cmd);
1016 int status = os::fork_and_exec(cmd);
1017 if (status != 0) {
1018 log_error(cds)("Child process finished; status = %d", status);
1019 log_error(cds)("To reproduce the error");
1020 ResourceMark rm;
1021 LogStream ls(Log(cds)::error());
1022 ls.print(" "); ls.print_raw_cr(cmd);
1023 vm_direct_exit(status);
1024 } else {
1025 log_info(cds)("Child process finished; status = %d", status);
1026 status = remove(SharedArchiveFile);
1027 if (status != 0) {
1028 log_error(cds)("Failed to remove CDSPreimage file %s", SharedArchiveFile);
1029 } else {
1030 log_info(cds)("Removed CDSPreimage file %s", SharedArchiveFile);
1031 }
1032 }
1033 }
1034 }
1035
1036 // Returns true if the class's status has changed.
1037 bool MetaspaceShared::try_link_class(JavaThread* current, InstanceKlass* ik) {
1038 ExceptionMark em(current);
1039 JavaThread* THREAD = current; // For exception macros.
1040 assert(CDSConfig::is_dumping_archive(), "sanity");
1041
1042 if (ik->is_shared() && !CDSConfig::is_dumping_final_static_archive()) {
1043 assert(CDSConfig::is_dumping_dynamic_archive(), "must be");
1044 return false;
1045 }
1046
1047 if (ik->is_loaded() && !ik->is_linked() && ik->can_be_verified_at_dumptime() &&
1048 !SystemDictionaryShared::has_class_failed_verification(ik)) {
1049 bool saved = BytecodeVerificationLocal;
1050 if (ik->is_shared_unregistered_class() && ik->class_loader() == nullptr) {
1051 // The verification decision is based on BytecodeVerificationRemote
1052 // for non-system classes. Since we are using the null classloader
1053 // to load non-system classes for customized class loaders during dumping,
1054 // we need to temporarily change BytecodeVerificationLocal to be the same as
1055 // BytecodeVerificationRemote. Note this can cause the parent system
1056 // classes also being verified. The extra overhead is acceptable during
1057 // dumping.
1058 BytecodeVerificationLocal = BytecodeVerificationRemote;
1059 }
1060 ik->link_class(THREAD);
1061 if (HAS_PENDING_EXCEPTION) {
1062 ResourceMark rm(THREAD);
1063 log_warning(cds)("Preload Warning: Verification failed for %s",
1064 ik->external_name());
1065 CLEAR_PENDING_EXCEPTION;
1066 SystemDictionaryShared::set_class_has_failed_verification(ik);
1067 }
1068 ik->compute_has_loops_flag_for_methods();
1069 BytecodeVerificationLocal = saved;
1070 return true;
1071 } else {
1072 return false;
1073 }
1074 }
1075
1076 #if INCLUDE_CDS_JAVA_HEAP
1077 void VM_PopulateDumpSharedSpace::dump_java_heap_objects(GrowableArray<Klass*>* klasses) {
1078 if(!HeapShared::can_write()) {
1079 if (!CDSConfig::is_dumping_preimage_static_archive()) {
1080 log_info(cds)(
1081 "Archived java heap is not supported as UseG1GC "
1082 "and UseCompressedClassPointers are required."
1083 "Current settings: UseG1GC=%s, UseCompressedClassPointers=%s.",
1084 BOOL_TO_STR(UseG1GC), BOOL_TO_STR(UseCompressedClassPointers));
1085 }
1086 return;
1087 }
1088 // Find all the interned strings that should be dumped.
1089 int i;
1090 for (i = 0; i < klasses->length(); i++) {
1091 Klass* k = klasses->at(i);
1092 if (k->is_instance_klass()) {
1093 InstanceKlass* ik = InstanceKlass::cast(k);
1094 if (ik->is_linked()) {
1095 ik->constants()->add_dumped_interned_strings();
1096 }
1097 }
1098 }
1099 if (_extra_interned_strings != nullptr) {
1100 for (i = 0; i < _extra_interned_strings->length(); i ++) {
1101 OopHandle string = _extra_interned_strings->at(i);
1102 HeapShared::add_to_dumped_interned_strings(string.resolve());
1103 }
1104 }
1105
1142 if (message != nullptr) {
1143 log_error(cds)("%s", message);
1144 }
1145 vm_exit_during_initialization("Unable to use shared archive.", nullptr);
1146 }
1147
1148 // This function is called when the JVM is unable to write the specified CDS archive due to an
1149 // unrecoverable error.
1150 void MetaspaceShared::unrecoverable_writing_error(const char* message) {
1151 log_error(cds)("An error has occurred while writing the shared archive file.");
1152 if (message != nullptr) {
1153 log_error(cds)("%s", message);
1154 }
1155 vm_direct_exit(1);
1156 }
1157
1158 void MetaspaceShared::initialize_runtime_shared_and_meta_spaces() {
1159 assert(UseSharedSpaces, "Must be called when UseSharedSpaces is enabled");
1160 MapArchiveResult result = MAP_ARCHIVE_OTHER_FAILURE;
1161
1162 FileMapInfo* static_mapinfo = FileMapInfo::current_info();
1163 FileMapInfo* dynamic_mapinfo = nullptr;
1164
1165 if (static_mapinfo != nullptr) {
1166 log_info(cds)("Core region alignment: " SIZE_FORMAT, static_mapinfo->core_region_alignment());
1167 dynamic_mapinfo = open_dynamic_archive();
1168
1169 // First try to map at the requested address
1170 result = map_archives(static_mapinfo, dynamic_mapinfo, true);
1171 if (result == MAP_ARCHIVE_MMAP_FAILURE) {
1172 // Mapping has failed (probably due to ASLR). Let's map at an address chosen
1173 // by the OS.
1174 log_info(cds)("Try to map archive(s) at an alternative address");
1175 result = map_archives(static_mapinfo, dynamic_mapinfo, false);
1176 }
1177 }
1178
1179 if (result == MAP_ARCHIVE_SUCCESS) {
1180 bool dynamic_mapped = (dynamic_mapinfo != nullptr && dynamic_mapinfo->is_mapped());
1181 char* cds_base = static_mapinfo->mapped_base();
1182 char* cds_end = dynamic_mapped ? dynamic_mapinfo->mapped_end() : static_mapinfo->mapped_end();
1189 FileMapInfo::set_shared_path_table(dynamic_mapinfo);
1190 // turn AutoCreateSharedArchive off if successfully mapped
1191 AutoCreateSharedArchive = false;
1192 } else {
1193 FileMapInfo::set_shared_path_table(static_mapinfo);
1194 }
1195 } else {
1196 set_shared_metaspace_range(nullptr, nullptr, nullptr);
1197 if (CDSConfig::is_dumping_dynamic_archive()) {
1198 log_warning(cds)("-XX:ArchiveClassesAtExit is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.");
1199 }
1200 UseSharedSpaces = false;
1201 // The base archive cannot be mapped. We cannot dump the dynamic shared archive.
1202 AutoCreateSharedArchive = false;
1203 CDSConfig::disable_dumping_dynamic_archive();
1204 log_info(cds)("Unable to map shared spaces");
1205 if (PrintSharedArchiveAndExit) {
1206 MetaspaceShared::unrecoverable_loading_error("Unable to use shared archive.");
1207 } else if (RequireSharedSpaces) {
1208 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1209 } else if (CDSConfig::is_dumping_final_static_archive()) {
1210 assert(CDSPreimage != nullptr, "must be");
1211 log_error(cds)("Unable to map shared spaces for CDSPreimage = %s", CDSPreimage);
1212 MetaspaceShared::unrecoverable_loading_error();
1213 }
1214 }
1215
1216 // If mapping failed and -XShare:on, the vm should exit
1217 bool has_failed = false;
1218 if (static_mapinfo != nullptr && !static_mapinfo->is_mapped()) {
1219 has_failed = true;
1220 delete static_mapinfo;
1221 }
1222 if (dynamic_mapinfo != nullptr && !dynamic_mapinfo->is_mapped()) {
1223 has_failed = true;
1224 delete dynamic_mapinfo;
1225 }
1226 if (RequireSharedSpaces && has_failed) {
1227 // static archive mapped but dynamic archive failed
1228 MetaspaceShared::unrecoverable_loading_error("Unable to map shared spaces");
1229 }
1230 }
1231
1232 // This is called very early at VM start up to get the size of the cached_code region, which
1233 // is used in CodeCache::initialize_heaps()
1234 void MetaspaceShared::open_static_archive() {
1235 if (!UseSharedSpaces) {
1236 return;
1237 }
1238 const char* static_archive = CDSConfig::static_archive_path();
1239 assert(static_archive != nullptr, "sanity");
1240 FileMapInfo* mapinfo = new FileMapInfo(static_archive, true);
1241 if (!mapinfo->initialize()) {
1242 delete(mapinfo);
1243 } else {
1244 FileMapRegion* r = mapinfo->region_at(MetaspaceShared::cc);
1245 CDSAccess::set_cached_code_size(r->used());
1246 }
1247 }
1248
1249 FileMapInfo* MetaspaceShared::open_dynamic_archive() {
1250 if (CDSConfig::is_dumping_dynamic_archive()) {
1251 return nullptr;
1252 }
1253 const char* dynamic_archive = CDSConfig::dynamic_archive_path();
1254 if (dynamic_archive == nullptr) {
1255 return nullptr;
1256 }
1257
1258 FileMapInfo* mapinfo = new FileMapInfo(dynamic_archive, false);
1259 if (!mapinfo->initialize()) {
1260 delete(mapinfo);
1261 if (RequireSharedSpaces) {
1262 MetaspaceShared::unrecoverable_loading_error("Failed to initialize dynamic archive");
1263 }
1264 return nullptr;
1265 }
1266 return mapinfo;
1636 if (archive_space_rs.is_reserved()) {
1637 log_debug(cds)("Released shared space (archive) " INTPTR_FORMAT, p2i(archive_space_rs.base()));
1638 archive_space_rs.release();
1639 }
1640 if (class_space_rs.is_reserved()) {
1641 log_debug(cds)("Released shared space (classes) " INTPTR_FORMAT, p2i(class_space_rs.base()));
1642 class_space_rs.release();
1643 }
1644 }
1645 }
1646
1647 static int archive_regions[] = { MetaspaceShared::rw, MetaspaceShared::ro };
1648 static int archive_regions_count = 2;
1649
1650 MapArchiveResult MetaspaceShared::map_archive(FileMapInfo* mapinfo, char* mapped_base_address, ReservedSpace rs) {
1651 assert(UseSharedSpaces, "must be runtime");
1652 if (mapinfo == nullptr) {
1653 return MAP_ARCHIVE_SUCCESS; // The dynamic archive has not been specified. No error has happened -- trivially succeeded.
1654 }
1655
1656 if (!mapinfo->validate_leyden_config()) {
1657 return MAP_ARCHIVE_OTHER_FAILURE;
1658 }
1659
1660 mapinfo->set_is_mapped(false);
1661 if (mapinfo->core_region_alignment() != (size_t)core_region_alignment()) {
1662 log_info(cds)("Unable to map CDS archive -- core_region_alignment() expected: " SIZE_FORMAT
1663 " actual: " SIZE_FORMAT, mapinfo->core_region_alignment(), core_region_alignment());
1664 return MAP_ARCHIVE_OTHER_FAILURE;
1665 }
1666
1667 MapArchiveResult result =
1668 mapinfo->map_regions(archive_regions, archive_regions_count, mapped_base_address, rs);
1669
1670 if (result != MAP_ARCHIVE_SUCCESS) {
1671 unmap_archive(mapinfo);
1672 return result;
1673 }
1674
1675 if (!mapinfo->validate_shared_path_table()) {
1676 unmap_archive(mapinfo);
1677 return MAP_ARCHIVE_OTHER_FAILURE;
1678 }
1679
1704 };
1705
1706 // Read the miscellaneous data from the shared file, and
1707 // serialize it out to its various destinations.
1708
1709 void MetaspaceShared::initialize_shared_spaces() {
1710 FileMapInfo *static_mapinfo = FileMapInfo::current_info();
1711
1712 // Verify various attributes of the archive, plus initialize the
1713 // shared string/symbol tables.
1714 char* buffer = static_mapinfo->serialized_data();
1715 intptr_t* array = (intptr_t*)buffer;
1716 ReadClosure rc(&array);
1717 serialize(&rc);
1718
1719 // Finish up archived heap initialization. These must be
1720 // done after ReadClosure.
1721 static_mapinfo->patch_heap_embedded_pointers();
1722 ArchiveHeapLoader::finish_initialization();
1723 Universe::load_archived_object_instances();
1724 SCCache::new_workflow_load_cache();
1725
1726 // Close the mapinfo file
1727 static_mapinfo->close();
1728
1729 static_mapinfo->unmap_region(MetaspaceShared::bm);
1730
1731 FileMapInfo *dynamic_mapinfo = FileMapInfo::dynamic_info();
1732 if (dynamic_mapinfo != nullptr) {
1733 intptr_t* buffer = (intptr_t*)dynamic_mapinfo->serialized_data();
1734 ReadClosure rc(&buffer);
1735 ArchiveBuilder::serialize_dynamic_archivable_items(&rc);
1736 DynamicArchive::setup_array_klasses();
1737 dynamic_mapinfo->close();
1738 dynamic_mapinfo->unmap_region(MetaspaceShared::bm);
1739 }
1740
1741 // Set up LambdaFormInvokers::_lambdaform_lines for dynamic dump
1742 if (CDSConfig::is_dumping_dynamic_archive()) {
1743 // Read stored LF format lines stored in static archive
1744 LambdaFormInvokers::read_static_archive_invokers();
1745 }
1746
1747 if (PrintSharedArchiveAndExit) {
1748 // Print archive names
1749 if (dynamic_mapinfo != nullptr) {
1750 tty->print_cr("\n\nBase archive name: %s", CDSConfig::static_archive_path());
1751 tty->print_cr("Base archive version %d", static_mapinfo->version());
1752 } else {
1753 tty->print_cr("Static archive name: %s", static_mapinfo->full_path());
1754 tty->print_cr("Static archive version %d", static_mapinfo->version());
1755 }
1756
1757 SystemDictionaryShared::print_shared_archive(tty);
1758 if (dynamic_mapinfo != nullptr) {
1759 tty->print_cr("\n\nDynamic archive name: %s", dynamic_mapinfo->full_path());
1760 tty->print_cr("Dynamic archive version %d", dynamic_mapinfo->version());
1761 SystemDictionaryShared::print_shared_archive(tty, false/*dynamic*/);
1762 }
1763 TrainingData::print_archived_training_data_on(tty);
1764
1765 if (LoadCachedCode) {
1766 tty->print_cr("\n\nCached Code file: %s", CachedCodeFile);
1767 SCCache::print_on(tty);
1768 }
1769
1770 // collect shared symbols and strings
1771 CountSharedSymbols cl;
1772 SymbolTable::shared_symbols_do(&cl);
1773 tty->print_cr("Number of shared symbols: %d", cl.total());
1774 tty->print_cr("Number of shared strings: %zu", StringTable::shared_entry_count());
1775 tty->print_cr("VM version: %s\r\n", static_mapinfo->vm_version());
1776 if (FileMapInfo::current_info() == nullptr || _archive_loading_failed) {
1777 tty->print_cr("archive is invalid");
1778 vm_exit(1);
1779 } else {
1780 tty->print_cr("archive is valid");
1781 vm_exit(0);
1782 }
1783 }
1784 }
1785
1786 // JVM/TI RedefineClasses() support:
1787 bool MetaspaceShared::remap_shared_readonly_as_readwrite() {
1788 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
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