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comparison src/share/vm/memory/universe.cpp @ 23466:92a6cfbf2d94

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8022865: [TESTBUG] Compressed Oops testing needs to be revised Summary: Rewrote compressed oops tests Reviewed-by: kvn, coleenp, mseledtsov
author dbuck
date Tue, 08 Dec 2015 14:23:56 +0000
parents d3f3f7677537
children 88ae10297731
comparison
equal deleted inserted replaced
23465:3ad3f93fe3d2 23466:92a6cfbf2d94
845 // This also makes implicit null checking work, because the 845 // This also makes implicit null checking work, because the
846 // memory+1 page below heap_base needs to cause a signal. 846 // memory+1 page below heap_base needs to cause a signal.
847 // See needs_explicit_null_check. 847 // See needs_explicit_null_check.
848 // Only set the heap base for compressed oops because it indicates 848 // Only set the heap base for compressed oops because it indicates
849 // compressed oops for pstack code. 849 // compressed oops for pstack code.
850 bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose);
851 if (verbose) {
852 tty->cr();
853 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB",
854 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M);
855 }
856 if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) { 850 if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) {
857 // Can't reserve heap below 32Gb. 851 // Can't reserve heap below 32Gb.
858 // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() 852 // keep the Universe::narrow_oop_base() set in Universe::reserve_heap()
859 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); 853 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
860 #ifdef AIX 854 #ifdef AIX
861 // There is no protected page before the heap. This assures all oops 855 // There is no protected page before the heap. This assures all oops
862 // are decoded so that NULL is preserved, so this page will not be accessed. 856 // are decoded so that NULL is preserved, so this page will not be accessed.
863 Universe::set_narrow_oop_use_implicit_null_checks(false); 857 Universe::set_narrow_oop_use_implicit_null_checks(false);
864 #endif 858 #endif
865 if (verbose) {
866 tty->print(", %s: "PTR_FORMAT,
867 narrow_oop_mode_to_string(HeapBasedNarrowOop),
868 Universe::narrow_oop_base());
869 }
870 } else { 859 } else {
871 Universe::set_narrow_oop_base(0); 860 Universe::set_narrow_oop_base(0);
872 if (verbose) {
873 tty->print(", %s", narrow_oop_mode_to_string(ZeroBasedNarrowOop));
874 }
875 #ifdef _WIN64 861 #ifdef _WIN64
876 if (!Universe::narrow_oop_use_implicit_null_checks()) { 862 if (!Universe::narrow_oop_use_implicit_null_checks()) {
877 // Don't need guard page for implicit checks in indexed addressing 863 // Don't need guard page for implicit checks in indexed addressing
878 // mode with zero based Compressed Oops. 864 // mode with zero based Compressed Oops.
879 Universe::set_narrow_oop_use_implicit_null_checks(true); 865 Universe::set_narrow_oop_use_implicit_null_checks(true);
882 if((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) { 868 if((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) {
883 // Can't reserve heap below 4Gb. 869 // Can't reserve heap below 4Gb.
884 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); 870 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
885 } else { 871 } else {
886 Universe::set_narrow_oop_shift(0); 872 Universe::set_narrow_oop_shift(0);
887 if (verbose) {
888 tty->print(", %s", narrow_oop_mode_to_string(UnscaledNarrowOop));
889 }
890 } 873 }
891 } 874 }
892 875
893 if (verbose) {
894 tty->cr();
895 tty->cr();
896 }
897 Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); 876 Universe::set_narrow_ptrs_base(Universe::narrow_oop_base());
877
878 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
879 Universe::print_compressed_oops_mode();
880 }
898 } 881 }
899 // Universe::narrow_oop_base() is one page below the heap. 882 // Universe::narrow_oop_base() is one page below the heap.
900 assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - 883 assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() -
901 os::vm_page_size()) || 884 os::vm_page_size()) ||
902 Universe::narrow_oop_base() == NULL, "invalid value"); 885 Universe::narrow_oop_base() == NULL, "invalid value");
913 ThreadLocalAllocBuffer::startup_initialization(); 896 ThreadLocalAllocBuffer::startup_initialization();
914 } 897 }
915 return JNI_OK; 898 return JNI_OK;
916 } 899 }
917 900
901 void Universe::print_compressed_oops_mode() {
902 tty->cr();
903 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB",
904 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M);
905
906 tty->print(", Compressed Oops mode: %s", narrow_oop_mode_to_string(narrow_oop_mode()));
907
908 if (Universe::narrow_oop_base() != 0) {
909 tty->print(":" PTR_FORMAT, Universe::narrow_oop_base());
910 }
911
912 if (Universe::narrow_oop_shift() != 0) {
913 tty->print(", Oop shift amount: %d", Universe::narrow_oop_shift());
914 }
915
916 tty->cr();
917 tty->cr();
918 }
918 919
919 // Reserve the Java heap, which is now the same for all GCs. 920 // Reserve the Java heap, which is now the same for all GCs.
920 ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { 921 ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) {
921 assert(alignment <= Arguments::conservative_max_heap_alignment(), 922 assert(alignment <= Arguments::conservative_max_heap_alignment(),
922 err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT, 923 err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT,
982 983
983 984
984 const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) { 985 const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) {
985 switch (mode) { 986 switch (mode) {
986 case UnscaledNarrowOop: 987 case UnscaledNarrowOop:
987 return "32-bits Oops"; 988 return "32-bit";
988 case ZeroBasedNarrowOop: 989 case ZeroBasedNarrowOop:
989 return "zero based Compressed Oops"; 990 return "Zero based";
990 case HeapBasedNarrowOop: 991 case HeapBasedNarrowOop:
991 return "Compressed Oops with base"; 992 return "Non-zero based";
992 } 993 }
993 994
994 ShouldNotReachHere(); 995 ShouldNotReachHere();
995 return ""; 996 return "";
996 } 997 }