Mercurial > hg > graal-compiler
comparison src/share/vm/memory/metaspaceShared.cpp @ 20804:7848fc12602b
Merge with jdk8u40-b25
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Tue, 07 Apr 2015 14:58:49 +0200 |
parents | eaf39a954227 0558eb13dcf3 |
children |
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20184:84105dcdb05b | 20804:7848fc12602b |
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22 * | 22 * |
23 */ | 23 */ |
24 | 24 |
25 #include "precompiled.hpp" | 25 #include "precompiled.hpp" |
26 #include "classfile/dictionary.hpp" | 26 #include "classfile/dictionary.hpp" |
27 #include "classfile/classLoaderExt.hpp" | |
27 #include "classfile/loaderConstraints.hpp" | 28 #include "classfile/loaderConstraints.hpp" |
28 #include "classfile/placeholders.hpp" | 29 #include "classfile/placeholders.hpp" |
30 #include "classfile/sharedClassUtil.hpp" | |
29 #include "classfile/symbolTable.hpp" | 31 #include "classfile/symbolTable.hpp" |
30 #include "classfile/systemDictionary.hpp" | 32 #include "classfile/systemDictionary.hpp" |
31 #include "code/codeCache.hpp" | 33 #include "code/codeCache.hpp" |
32 #include "memory/filemap.hpp" | 34 #include "memory/filemap.hpp" |
33 #include "memory/gcLocker.hpp" | 35 #include "memory/gcLocker.hpp" |
36 #include "oops/objArrayOop.hpp" | 38 #include "oops/objArrayOop.hpp" |
37 #include "oops/oop.inline.hpp" | 39 #include "oops/oop.inline.hpp" |
38 #include "runtime/signature.hpp" | 40 #include "runtime/signature.hpp" |
39 #include "runtime/vm_operations.hpp" | 41 #include "runtime/vm_operations.hpp" |
40 #include "runtime/vmThread.hpp" | 42 #include "runtime/vmThread.hpp" |
43 #include "utilities/hashtable.hpp" | |
41 #include "utilities/hashtable.inline.hpp" | 44 #include "utilities/hashtable.inline.hpp" |
42 | 45 |
43 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC | 46 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
44 | 47 |
45 int MetaspaceShared::_max_alignment = 0; | 48 int MetaspaceShared::_max_alignment = 0; |
46 | 49 |
47 ReservedSpace* MetaspaceShared::_shared_rs = NULL; | 50 ReservedSpace* MetaspaceShared::_shared_rs = NULL; |
48 | 51 |
52 bool MetaspaceShared::_link_classes_made_progress; | |
53 bool MetaspaceShared::_check_classes_made_progress; | |
54 bool MetaspaceShared::_has_error_classes; | |
55 bool MetaspaceShared::_archive_loading_failed = false; | |
49 // Read/write a data stream for restoring/preserving metadata pointers and | 56 // Read/write a data stream for restoring/preserving metadata pointers and |
50 // miscellaneous data from/to the shared archive file. | 57 // miscellaneous data from/to the shared archive file. |
51 | 58 |
52 void MetaspaceShared::serialize(SerializeClosure* soc) { | 59 void MetaspaceShared::serialize(SerializeClosure* soc) { |
53 int tag = 0; | 60 int tag = 0; |
443 _global_klass_objects = new GrowableArray<Klass*>(1000); | 450 _global_klass_objects = new GrowableArray<Klass*>(1000); |
444 Universe::basic_type_classes_do(collect_classes); | 451 Universe::basic_type_classes_do(collect_classes); |
445 SystemDictionary::classes_do(collect_classes); | 452 SystemDictionary::classes_do(collect_classes); |
446 | 453 |
447 tty->print_cr("Number of classes %d", _global_klass_objects->length()); | 454 tty->print_cr("Number of classes %d", _global_klass_objects->length()); |
455 { | |
456 int num_type_array = 0, num_obj_array = 0, num_inst = 0; | |
457 for (int i = 0; i < _global_klass_objects->length(); i++) { | |
458 Klass* k = _global_klass_objects->at(i); | |
459 if (k->oop_is_instance()) { | |
460 num_inst ++; | |
461 } else if (k->oop_is_objArray()) { | |
462 num_obj_array ++; | |
463 } else { | |
464 assert(k->oop_is_typeArray(), "sanity"); | |
465 num_type_array ++; | |
466 } | |
467 } | |
468 tty->print_cr(" instance classes = %5d", num_inst); | |
469 tty->print_cr(" obj array classes = %5d", num_obj_array); | |
470 tty->print_cr(" type array classes = %5d", num_type_array); | |
471 } | |
448 | 472 |
449 // Update all the fingerprints in the shared methods. | 473 // Update all the fingerprints in the shared methods. |
450 tty->print("Calculating fingerprints ... "); | 474 tty->print("Calculating fingerprints ... "); |
451 calculate_fingerprints(); | 475 calculate_fingerprints(); |
452 tty->print_cr("done. "); | 476 tty->print_cr("done. "); |
508 SymbolTable::copy_table(&md_top, md_end); | 532 SymbolTable::copy_table(&md_top, md_end); |
509 SystemDictionary::copy_table(&md_top, md_end); | 533 SystemDictionary::copy_table(&md_top, md_end); |
510 ClassLoader::verify(); | 534 ClassLoader::verify(); |
511 ClassLoader::copy_package_info_table(&md_top, md_end); | 535 ClassLoader::copy_package_info_table(&md_top, md_end); |
512 ClassLoader::verify(); | 536 ClassLoader::verify(); |
537 | |
538 ClassLoaderExt::copy_lookup_cache_to_archive(&md_top, md_end); | |
513 | 539 |
514 // Write the other data to the output array. | 540 // Write the other data to the output array. |
515 WriteClosure wc(md_top, md_end); | 541 WriteClosure wc(md_top, md_end); |
516 MetaspaceShared::serialize(&wc); | 542 MetaspaceShared::serialize(&wc); |
517 md_top = wc.get_top(); | 543 md_top = wc.get_top(); |
609 dac.dump_stats(int(ro_bytes), int(rw_bytes), int(md_bytes), int(mc_bytes)); | 635 dac.dump_stats(int(ro_bytes), int(rw_bytes), int(md_bytes), int(mc_bytes)); |
610 } | 636 } |
611 #undef fmt_space | 637 #undef fmt_space |
612 } | 638 } |
613 | 639 |
614 static void link_shared_classes(Klass* obj, TRAPS) { | 640 |
641 void MetaspaceShared::link_one_shared_class(Klass* obj, TRAPS) { | |
615 Klass* k = obj; | 642 Klass* k = obj; |
616 if (k->oop_is_instance()) { | 643 if (k->oop_is_instance()) { |
617 InstanceKlass* ik = (InstanceKlass*) k; | 644 InstanceKlass* ik = (InstanceKlass*) k; |
618 // Link the class to cause the bytecodes to be rewritten and the | 645 // Link the class to cause the bytecodes to be rewritten and the |
619 // cpcache to be created. | 646 // cpcache to be created. Class verification is done according |
620 if (ik->init_state() < InstanceKlass::linked) { | 647 // to -Xverify setting. |
621 ik->link_class(THREAD); | 648 _link_classes_made_progress |= try_link_class(ik, THREAD); |
622 guarantee(!HAS_PENDING_EXCEPTION, "exception in class rewriting"); | 649 guarantee(!HAS_PENDING_EXCEPTION, "exception in link_class"); |
623 } | 650 } |
624 } | 651 } |
625 } | 652 |
626 | 653 void MetaspaceShared::check_one_shared_class(Klass* k) { |
627 | 654 if (k->oop_is_instance() && InstanceKlass::cast(k)->check_sharing_error_state()) { |
628 // Support for a simple checksum of the contents of the class list | 655 _check_classes_made_progress = true; |
629 // file to prevent trivial tampering. The algorithm matches that in | 656 } |
630 // the MakeClassList program used by the J2SE build process. | 657 } |
631 #define JSUM_SEED ((jlong)CONST64(0xcafebabebabecafe)) | 658 |
632 static jlong | 659 void MetaspaceShared::link_and_cleanup_shared_classes(TRAPS) { |
633 jsum(jlong start, const char *buf, const int len) | 660 // We need to iterate because verification may cause additional classes |
634 { | 661 // to be loaded. |
635 jlong h = start; | 662 do { |
636 char *p = (char *)buf, *e = p + len; | 663 _link_classes_made_progress = false; |
637 while (p < e) { | 664 SystemDictionary::classes_do(link_one_shared_class, THREAD); |
638 char c = *p++; | 665 guarantee(!HAS_PENDING_EXCEPTION, "exception in link_class"); |
639 if (c <= ' ') { | 666 } while (_link_classes_made_progress); |
640 /* Skip spaces and control characters */ | 667 |
641 continue; | 668 if (_has_error_classes) { |
642 } | 669 // Mark all classes whose super class or interfaces failed verification. |
643 h = 31 * h + c; | 670 do { |
644 } | 671 // Not completely sure if we need to do this iteratively. Anyway, |
645 return h; | 672 // we should come here only if there are unverifiable classes, which |
673 // shouldn't happen in normal cases. So better safe than sorry. | |
674 _check_classes_made_progress = false; | |
675 SystemDictionary::classes_do(check_one_shared_class); | |
676 } while (_check_classes_made_progress); | |
677 | |
678 if (IgnoreUnverifiableClassesDuringDump) { | |
679 // This is useful when running JCK or SQE tests. You should not | |
680 // enable this when running real apps. | |
681 SystemDictionary::remove_classes_in_error_state(); | |
682 } else { | |
683 tty->print_cr("Please remove the unverifiable classes from your class list and try again"); | |
684 exit(1); | |
685 } | |
686 } | |
687 } | |
688 | |
689 void MetaspaceShared::prepare_for_dumping() { | |
690 ClassLoader::initialize_shared_path(); | |
691 FileMapInfo::allocate_classpath_entry_table(); | |
646 } | 692 } |
647 | 693 |
648 // Preload classes from a list, populate the shared spaces and dump to a | 694 // Preload classes from a list, populate the shared spaces and dump to a |
649 // file. | 695 // file. |
650 void MetaspaceShared::preload_and_dump(TRAPS) { | 696 void MetaspaceShared::preload_and_dump(TRAPS) { |
651 TraceTime timer("Dump Shared Spaces", TraceStartupTime); | 697 TraceTime timer("Dump Shared Spaces", TraceStartupTime); |
652 ResourceMark rm; | 698 ResourceMark rm; |
653 | 699 |
700 tty->print_cr("Allocated shared space: %d bytes at " PTR_FORMAT, | |
701 MetaspaceShared::shared_rs()->size(), | |
702 MetaspaceShared::shared_rs()->base()); | |
703 | |
654 // Preload classes to be shared. | 704 // Preload classes to be shared. |
655 // Should use some os:: method rather than fopen() here. aB. | 705 // Should use some os:: method rather than fopen() here. aB. |
656 // Construct the path to the class list (in jre/lib) | 706 const char* class_list_path; |
657 // Walk up two directories from the location of the VM and | 707 if (SharedClassListFile == NULL) { |
658 // optionally tack on "lib" (depending on platform) | 708 // Construct the path to the class list (in jre/lib) |
659 char class_list_path[JVM_MAXPATHLEN]; | 709 // Walk up two directories from the location of the VM and |
660 os::jvm_path(class_list_path, sizeof(class_list_path)); | 710 // optionally tack on "lib" (depending on platform) |
661 for (int i = 0; i < 3; i++) { | 711 char class_list_path_str[JVM_MAXPATHLEN]; |
662 char *end = strrchr(class_list_path, *os::file_separator()); | 712 os::jvm_path(class_list_path_str, sizeof(class_list_path_str)); |
663 if (end != NULL) *end = '\0'; | 713 for (int i = 0; i < 3; i++) { |
664 } | 714 char *end = strrchr(class_list_path_str, *os::file_separator()); |
665 int class_list_path_len = (int)strlen(class_list_path); | 715 if (end != NULL) *end = '\0'; |
666 if (class_list_path_len >= 3) { | 716 } |
667 if (strcmp(class_list_path + class_list_path_len - 3, "lib") != 0) { | 717 int class_list_path_len = (int)strlen(class_list_path_str); |
668 strcat(class_list_path, os::file_separator()); | 718 if (class_list_path_len >= 3) { |
669 strcat(class_list_path, "lib"); | 719 if (strcmp(class_list_path_str + class_list_path_len - 3, "lib") != 0) { |
670 } | 720 strcat(class_list_path_str, os::file_separator()); |
671 } | 721 strcat(class_list_path_str, "lib"); |
672 strcat(class_list_path, os::file_separator()); | 722 } |
673 strcat(class_list_path, "classlist"); | 723 } |
674 | 724 strcat(class_list_path_str, os::file_separator()); |
725 strcat(class_list_path_str, "classlist"); | |
726 class_list_path = class_list_path_str; | |
727 } else { | |
728 class_list_path = SharedClassListFile; | |
729 } | |
730 | |
731 int class_count = 0; | |
732 GrowableArray<Klass*>* class_promote_order = new GrowableArray<Klass*>(); | |
733 | |
734 // sun.io.Converters | |
735 static const char obj_array_sig[] = "[[Ljava/lang/Object;"; | |
736 SymbolTable::new_permanent_symbol(obj_array_sig, THREAD); | |
737 | |
738 // java.util.HashMap | |
739 static const char map_entry_array_sig[] = "[Ljava/util/Map$Entry;"; | |
740 SymbolTable::new_permanent_symbol(map_entry_array_sig, THREAD); | |
741 | |
742 tty->print_cr("Loading classes to share ..."); | |
743 _has_error_classes = false; | |
744 class_count += preload_and_dump(class_list_path, class_promote_order, | |
745 THREAD); | |
746 if (ExtraSharedClassListFile) { | |
747 class_count += preload_and_dump(ExtraSharedClassListFile, class_promote_order, | |
748 THREAD); | |
749 } | |
750 tty->print_cr("Loading classes to share: done."); | |
751 | |
752 ClassLoaderExt::init_lookup_cache(THREAD); | |
753 | |
754 if (PrintSharedSpaces) { | |
755 tty->print_cr("Shared spaces: preloaded %d classes", class_count); | |
756 } | |
757 | |
758 // Rewrite and link classes | |
759 tty->print_cr("Rewriting and linking classes ..."); | |
760 | |
761 // Link any classes which got missed. This would happen if we have loaded classes that | |
762 // were not explicitly specified in the classlist. E.g., if an interface implemented by class K | |
763 // fails verification, all other interfaces that were not specified in the classlist but | |
764 // are implemented by K are not verified. | |
765 link_and_cleanup_shared_classes(CATCH); | |
766 tty->print_cr("Rewriting and linking classes: done"); | |
767 | |
768 // Create and dump the shared spaces. Everything so far is loaded | |
769 // with the null class loader. | |
770 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); | |
771 VM_PopulateDumpSharedSpace op(loader_data, class_promote_order); | |
772 VMThread::execute(&op); | |
773 | |
774 // Since various initialization steps have been undone by this process, | |
775 // it is not reasonable to continue running a java process. | |
776 exit(0); | |
777 } | |
778 | |
779 int MetaspaceShared::preload_and_dump(const char * class_list_path, | |
780 GrowableArray<Klass*>* class_promote_order, | |
781 TRAPS) { | |
675 FILE* file = fopen(class_list_path, "r"); | 782 FILE* file = fopen(class_list_path, "r"); |
783 char class_name[256]; | |
784 int class_count = 0; | |
785 | |
676 if (file != NULL) { | 786 if (file != NULL) { |
677 jlong computed_jsum = JSUM_SEED; | |
678 jlong file_jsum = 0; | |
679 | |
680 char class_name[256]; | |
681 int class_count = 0; | |
682 GrowableArray<Klass*>* class_promote_order = new GrowableArray<Klass*>(); | |
683 | |
684 // sun.io.Converters | |
685 static const char obj_array_sig[] = "[[Ljava/lang/Object;"; | |
686 SymbolTable::new_permanent_symbol(obj_array_sig, THREAD); | |
687 | |
688 // java.util.HashMap | |
689 static const char map_entry_array_sig[] = "[Ljava/util/Map$Entry;"; | |
690 SymbolTable::new_permanent_symbol(map_entry_array_sig, THREAD); | |
691 | |
692 tty->print("Loading classes to share ... "); | |
693 while ((fgets(class_name, sizeof class_name, file)) != NULL) { | 787 while ((fgets(class_name, sizeof class_name, file)) != NULL) { |
694 if (*class_name == '#') { | 788 if (*class_name == '#') { // comment |
695 jint fsh, fsl; | |
696 if (sscanf(class_name, "# %8x%8x\n", &fsh, &fsl) == 2) { | |
697 file_jsum = ((jlong)(fsh) << 32) | (fsl & 0xffffffff); | |
698 } | |
699 | |
700 continue; | 789 continue; |
701 } | 790 } |
702 // Remove trailing newline | 791 // Remove trailing newline |
703 size_t name_len = strlen(class_name); | 792 size_t name_len = strlen(class_name); |
704 class_name[name_len-1] = '\0'; | 793 if (class_name[name_len-1] == '\n') { |
705 | 794 class_name[name_len-1] = '\0'; |
706 computed_jsum = jsum(computed_jsum, class_name, (const int)name_len - 1); | 795 } |
707 | 796 |
708 // Got a class name - load it. | 797 // Got a class name - load it. |
709 TempNewSymbol class_name_symbol = SymbolTable::new_permanent_symbol(class_name, THREAD); | 798 TempNewSymbol class_name_symbol = SymbolTable::new_permanent_symbol(class_name, THREAD); |
710 guarantee(!HAS_PENDING_EXCEPTION, "Exception creating a symbol."); | 799 guarantee(!HAS_PENDING_EXCEPTION, "Exception creating a symbol."); |
711 Klass* klass = SystemDictionary::resolve_or_null(class_name_symbol, | 800 Klass* klass = SystemDictionary::resolve_or_null(class_name_symbol, |
712 THREAD); | 801 THREAD); |
713 guarantee(!HAS_PENDING_EXCEPTION, "Exception resolving a class."); | 802 CLEAR_PENDING_EXCEPTION; |
714 if (klass != NULL) { | 803 if (klass != NULL) { |
715 if (PrintSharedSpaces && Verbose && WizardMode) { | 804 if (PrintSharedSpaces && Verbose && WizardMode) { |
716 tty->print_cr("Shared spaces preloaded: %s", class_name); | 805 tty->print_cr("Shared spaces preloaded: %s", class_name); |
717 } | 806 } |
718 | 807 |
719 | |
720 InstanceKlass* ik = InstanceKlass::cast(klass); | 808 InstanceKlass* ik = InstanceKlass::cast(klass); |
721 | 809 |
722 // Should be class load order as per -XX:+TraceClassLoadingPreorder | 810 // Should be class load order as per -XX:+TraceClassLoadingPreorder |
723 class_promote_order->append(ik); | 811 class_promote_order->append(ik); |
724 | 812 |
725 // Link the class to cause the bytecodes to be rewritten and the | 813 // Link the class to cause the bytecodes to be rewritten and the |
726 // cpcache to be created. The linking is done as soon as classes | 814 // cpcache to be created. The linking is done as soon as classes |
727 // are loaded in order that the related data structures (klass and | 815 // are loaded in order that the related data structures (klass and |
728 // cpCache) are located together. | 816 // cpCache) are located together. |
729 | 817 try_link_class(ik, THREAD); |
730 if (ik->init_state() < InstanceKlass::linked) { | 818 guarantee(!HAS_PENDING_EXCEPTION, "exception in link_class"); |
731 ik->link_class(THREAD); | |
732 guarantee(!(HAS_PENDING_EXCEPTION), "exception in class rewriting"); | |
733 } | |
734 | |
735 // TODO: Resolve klasses in constant pool | |
736 ik->constants()->resolve_class_constants(THREAD); | |
737 | 819 |
738 class_count++; | 820 class_count++; |
739 } else { | 821 } else { |
740 if (PrintSharedSpaces && Verbose && WizardMode) { | 822 //tty->print_cr("Preload failed: %s", class_name); |
741 tty->cr(); | |
742 tty->print_cr(" Preload failed: %s", class_name); | |
743 } | |
744 } | 823 } |
745 file_jsum = 0; // Checksum must be on last line of file | 824 } |
746 } | 825 fclose(file); |
747 if (computed_jsum != file_jsum) { | |
748 tty->cr(); | |
749 tty->print_cr("Preload failed: checksum of class list was incorrect."); | |
750 exit(1); | |
751 } | |
752 | |
753 tty->print_cr("done. "); | |
754 | |
755 if (PrintSharedSpaces) { | |
756 tty->print_cr("Shared spaces: preloaded %d classes", class_count); | |
757 } | |
758 | |
759 // Rewrite and unlink classes. | |
760 tty->print("Rewriting and linking classes ... "); | |
761 | |
762 // Link any classes which got missed. (It's not quite clear why | |
763 // they got missed.) This iteration would be unsafe if we weren't | |
764 // single-threaded at this point; however we can't do it on the VM | |
765 // thread because it requires object allocation. | |
766 SystemDictionary::classes_do(link_shared_classes, CATCH); | |
767 tty->print_cr("done. "); | |
768 | |
769 // Create and dump the shared spaces. Everything so far is loaded | |
770 // with the null class loader. | |
771 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); | |
772 VM_PopulateDumpSharedSpace op(loader_data, class_promote_order); | |
773 VMThread::execute(&op); | |
774 | |
775 } else { | 826 } else { |
776 char errmsg[JVM_MAXPATHLEN]; | 827 char errmsg[JVM_MAXPATHLEN]; |
777 os::lasterror(errmsg, JVM_MAXPATHLEN); | 828 os::lasterror(errmsg, JVM_MAXPATHLEN); |
778 tty->print_cr("Loading classlist failed: %s", errmsg); | 829 tty->print_cr("Loading classlist failed: %s", errmsg); |
779 exit(1); | 830 exit(1); |
780 } | 831 } |
781 | 832 |
782 // Since various initialization steps have been undone by this process, | 833 return class_count; |
783 // it is not reasonable to continue running a java process. | 834 } |
784 exit(0); | 835 |
785 } | 836 // Returns true if the class's status has changed |
786 | 837 bool MetaspaceShared::try_link_class(InstanceKlass* ik, TRAPS) { |
838 assert(DumpSharedSpaces, "should only be called during dumping"); | |
839 if (ik->init_state() < InstanceKlass::linked) { | |
840 bool saved = BytecodeVerificationLocal; | |
841 if (!SharedClassUtil::is_shared_boot_class(ik)) { | |
842 // The verification decision is based on BytecodeVerificationRemote | |
843 // for non-system classes. Since we are using the NULL classloader | |
844 // to load non-system classes during dumping, we need to temporarily | |
845 // change BytecodeVerificationLocal to be the same as | |
846 // BytecodeVerificationRemote. Note this can cause the parent system | |
847 // classes also being verified. The extra overhead is acceptable during | |
848 // dumping. | |
849 BytecodeVerificationLocal = BytecodeVerificationRemote; | |
850 } | |
851 ik->link_class(THREAD); | |
852 if (HAS_PENDING_EXCEPTION) { | |
853 ResourceMark rm; | |
854 tty->print_cr("Preload Warning: Verification failed for %s", | |
855 ik->external_name()); | |
856 CLEAR_PENDING_EXCEPTION; | |
857 ik->set_in_error_state(); | |
858 _has_error_classes = true; | |
859 } | |
860 BytecodeVerificationLocal = saved; | |
861 return true; | |
862 } else { | |
863 return false; | |
864 } | |
865 } | |
787 | 866 |
788 // Closure for serializing initialization data in from a data area | 867 // Closure for serializing initialization data in from a data area |
789 // (ptr_array) read from the shared file. | 868 // (ptr_array) read from the shared file. |
790 | 869 |
791 class ReadClosure : public SerializeClosure { | 870 class ReadClosure : public SerializeClosure { |
869 mapinfo->verify_region_checksum(rw) && | 948 mapinfo->verify_region_checksum(rw) && |
870 (_md_base = mapinfo->map_region(md)) != NULL && | 949 (_md_base = mapinfo->map_region(md)) != NULL && |
871 mapinfo->verify_region_checksum(md) && | 950 mapinfo->verify_region_checksum(md) && |
872 (_mc_base = mapinfo->map_region(mc)) != NULL && | 951 (_mc_base = mapinfo->map_region(mc)) != NULL && |
873 mapinfo->verify_region_checksum(mc) && | 952 mapinfo->verify_region_checksum(mc) && |
874 (image_alignment == (size_t)max_alignment())) { | 953 (image_alignment == (size_t)max_alignment()) && |
954 mapinfo->validate_classpath_entry_table()) { | |
875 // Success (no need to do anything) | 955 // Success (no need to do anything) |
876 return true; | 956 return true; |
877 } else { | 957 } else { |
878 // If there was a failure in mapping any of the spaces, unmap the ones | 958 // If there was a failure in mapping any of the spaces, unmap the ones |
879 // that succeeded | 959 // that succeeded |
885 // Release the entire mapped region | 965 // Release the entire mapped region |
886 shared_rs.release(); | 966 shared_rs.release(); |
887 #endif | 967 #endif |
888 // If -Xshare:on is specified, print out the error message and exit VM, | 968 // If -Xshare:on is specified, print out the error message and exit VM, |
889 // otherwise, set UseSharedSpaces to false and continue. | 969 // otherwise, set UseSharedSpaces to false and continue. |
890 if (RequireSharedSpaces) { | 970 if (RequireSharedSpaces || PrintSharedArchiveAndExit) { |
891 vm_exit_during_initialization("Unable to use shared archive.", NULL); | 971 vm_exit_during_initialization("Unable to use shared archive.", "Failed map_region for using -Xshare:on."); |
892 } else { | 972 } else { |
893 FLAG_SET_DEFAULT(UseSharedSpaces, false); | 973 FLAG_SET_DEFAULT(UseSharedSpaces, false); |
894 } | 974 } |
895 return false; | 975 return false; |
896 } | 976 } |
980 | 1060 |
981 len = *(intptr_t*)buffer; // skip over package info table char[] arrays. | 1061 len = *(intptr_t*)buffer; // skip over package info table char[] arrays. |
982 buffer += sizeof(intptr_t); | 1062 buffer += sizeof(intptr_t); |
983 buffer += len; | 1063 buffer += len; |
984 | 1064 |
1065 buffer = ClassLoaderExt::restore_lookup_cache_from_archive(buffer); | |
1066 | |
985 intptr_t* array = (intptr_t*)buffer; | 1067 intptr_t* array = (intptr_t*)buffer; |
986 ReadClosure rc(&array); | 1068 ReadClosure rc(&array); |
987 serialize(&rc); | 1069 serialize(&rc); |
988 | 1070 |
989 // Close the mapinfo file | 1071 // Close the mapinfo file |
990 mapinfo->close(); | 1072 mapinfo->close(); |
1073 | |
1074 if (PrintSharedArchiveAndExit) { | |
1075 if (PrintSharedDictionary) { | |
1076 tty->print_cr("\nShared classes:\n"); | |
1077 SystemDictionary::print_shared(false); | |
1078 } | |
1079 if (_archive_loading_failed) { | |
1080 tty->print_cr("archive is invalid"); | |
1081 vm_exit(1); | |
1082 } else { | |
1083 tty->print_cr("archive is valid"); | |
1084 vm_exit(0); | |
1085 } | |
1086 } | |
991 } | 1087 } |
992 | 1088 |
993 // JVM/TI RedefineClasses() support: | 1089 // JVM/TI RedefineClasses() support: |
994 bool MetaspaceShared::remap_shared_readonly_as_readwrite() { | 1090 bool MetaspaceShared::remap_shared_readonly_as_readwrite() { |
995 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | 1091 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
1001 return false; | 1097 return false; |
1002 } | 1098 } |
1003 } | 1099 } |
1004 return true; | 1100 return true; |
1005 } | 1101 } |
1102 | |
1103 int MetaspaceShared::count_class(const char* classlist_file) { | |
1104 if (classlist_file == NULL) { | |
1105 return 0; | |
1106 } | |
1107 char class_name[256]; | |
1108 int class_count = 0; | |
1109 FILE* file = fopen(classlist_file, "r"); | |
1110 if (file != NULL) { | |
1111 while ((fgets(class_name, sizeof class_name, file)) != NULL) { | |
1112 if (*class_name == '#') { // comment | |
1113 continue; | |
1114 } | |
1115 class_count++; | |
1116 } | |
1117 fclose(file); | |
1118 } else { | |
1119 char errmsg[JVM_MAXPATHLEN]; | |
1120 os::lasterror(errmsg, JVM_MAXPATHLEN); | |
1121 tty->print_cr("Loading classlist failed: %s", errmsg); | |
1122 exit(1); | |
1123 } | |
1124 | |
1125 return class_count; | |
1126 } | |
1127 | |
1128 // the sizes are good for typical large applications that have a lot of shared | |
1129 // classes | |
1130 void MetaspaceShared::estimate_regions_size() { | |
1131 int class_count = count_class(SharedClassListFile); | |
1132 class_count += count_class(ExtraSharedClassListFile); | |
1133 | |
1134 if (class_count > LargeThresholdClassCount) { | |
1135 if (class_count < HugeThresholdClassCount) { | |
1136 SET_ESTIMATED_SIZE(Large, ReadOnly); | |
1137 SET_ESTIMATED_SIZE(Large, ReadWrite); | |
1138 SET_ESTIMATED_SIZE(Large, MiscData); | |
1139 SET_ESTIMATED_SIZE(Large, MiscCode); | |
1140 } else { | |
1141 SET_ESTIMATED_SIZE(Huge, ReadOnly); | |
1142 SET_ESTIMATED_SIZE(Huge, ReadWrite); | |
1143 SET_ESTIMATED_SIZE(Huge, MiscData); | |
1144 SET_ESTIMATED_SIZE(Huge, MiscCode); | |
1145 } | |
1146 } | |
1147 } |