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 "memory/allocation.inline.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/arguments.hpp"
29 #include "runtime/globals.hpp"
30 #include "runtime/globals_extension.hpp"
31 #include "runtime/os.hpp"
32 #include "trace/tracing.hpp"
33 #include "utilities/macros.hpp"
34 #include "utilities/ostream.hpp"
35 #include "utilities/top.hpp"
36 #if INCLUDE_ALL_GCS
37 #include "gc/g1/g1_globals.hpp"
38 #endif // INCLUDE_ALL_GCS
39 #ifdef COMPILER1
40 #include "c1/c1_globals.hpp"
41 #endif
42 #ifdef COMPILER2
43 #include "opto/c2_globals.hpp"
44 #endif
45 #ifdef SHARK
46 #include "shark/shark_globals.hpp"
47 #endif
48
49 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
50
51 RUNTIME_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
52 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
53 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
54 MATERIALIZE_NOTPRODUCT_FLAG, \
55 MATERIALIZE_MANAGEABLE_FLAG, MATERIALIZE_PRODUCT_RW_FLAG, \
56 MATERIALIZE_LP64_PRODUCT_FLAG)
57
58 RUNTIME_OS_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PD_DEVELOPER_FLAG, \
59 MATERIALIZE_PRODUCT_FLAG, MATERIALIZE_PD_PRODUCT_FLAG, \
60 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_NOTPRODUCT_FLAG)
61
62 ARCH_FLAGS(MATERIALIZE_DEVELOPER_FLAG, MATERIALIZE_PRODUCT_FLAG, \
63 MATERIALIZE_DIAGNOSTIC_FLAG, MATERIALIZE_EXPERIMENTAL_FLAG, \
64 MATERIALIZE_NOTPRODUCT_FLAG)
65
66 MATERIALIZE_FLAGS_EXT
67
68
69 static bool is_product_build() {
70 #ifdef PRODUCT
71 return true;
72 #else
73 return false;
74 #endif
75 }
76
77 void Flag::check_writable() {
78 if (is_constant_in_binary()) {
79 fatal(err_msg("flag is constant: %s", _name));
80 }
81 }
82
83 bool Flag::is_bool() const {
84 return strcmp(_type, "bool") == 0;
85 }
86
87 bool Flag::get_bool() const {
88 return *((bool*) _addr);
314 }
315 get_locked_message_ext(buf, buflen);
316 }
317
318 bool Flag::is_writeable() const {
319 return is_manageable() || (is_product() && is_read_write()) || is_writeable_ext();
320 }
321
322 // All flags except "manageable" are assumed to be internal flags.
323 // Long term, we need to define a mechanism to specify which flags
324 // are external/stable and change this function accordingly.
325 bool Flag::is_external() const {
326 return is_manageable() || is_external_ext();
327 }
328
329
330 // Length of format string (e.g. "%.1234s") for printing ccstr below
331 #define FORMAT_BUFFER_LEN 16
332
333 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
334 void Flag::print_on(outputStream* st, bool withComments) {
335 // Don't print notproduct and develop flags in a product build.
336 if (is_constant_in_binary()) {
337 return;
338 }
339
340 st->print("%9s %-40s %c= ", _type, _name, (!is_default() ? ':' : ' '));
341
342 if (is_bool()) {
343 st->print("%-16s", get_bool() ? "true" : "false");
344 }
345 if (is_int()) {
346 st->print("%-16d", get_int());
347 }
348 if (is_uint()) {
349 st->print("%-16u", get_uint());
350 }
351 if (is_intx()) {
352 st->print("%-16ld", get_intx());
353 }
354 if (is_uintx()) {
355 st->print("%-16lu", get_uintx());
356 }
357 if (is_uint64_t()) {
358 st->print("%-16lu", get_uint64_t());
359 }
360 if (is_size_t()) {
361 st->print(SIZE_FORMAT_W(-16), get_size_t());
362 }
363 if (is_double()) {
364 st->print("%-16f", get_double());
365 }
366 if (is_ccstr()) {
367 const char* cp = get_ccstr();
368 if (cp != NULL) {
369 const char* eol;
370 while ((eol = strchr(cp, '\n')) != NULL) {
371 char format_buffer[FORMAT_BUFFER_LEN];
372 size_t llen = pointer_delta(eol, cp, sizeof(char));
373 jio_snprintf(format_buffer, FORMAT_BUFFER_LEN,
374 "%%." SIZE_FORMAT "s", llen);
375 PRAGMA_DIAG_PUSH
376 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
377 st->print(format_buffer, cp);
378 PRAGMA_DIAG_POP
379 st->cr();
380 cp = eol+1;
381 st->print("%5s %-35s += ", "", _name);
382 }
383 st->print("%-16s", cp);
384 }
385 else st->print("%-16s", "");
386 }
387
388 st->print("%-20s", " ");
389 print_kind(st);
390
391 if (withComments) {
392 #ifndef PRODUCT
393 st->print("%s", _doc);
394 #endif
395 }
396 st->cr();
397 }
398
399 void Flag::print_kind(outputStream* st) {
400 struct Data {
401 int flag;
402 const char* name;
403 };
404
405 Data data[] = {
406 { KIND_C1, "C1" },
407 { KIND_C2, "C2" },
408 { KIND_ARCH, "ARCH" },
409 { KIND_SHARK, "SHARK" },
410 { KIND_PLATFORM_DEPENDENT, "pd" },
411 { KIND_PRODUCT, "product" },
412 { KIND_MANAGEABLE, "manageable" },
413 { KIND_DIAGNOSTIC, "diagnostic" },
414 { KIND_EXPERIMENTAL, "experimental" },
415 { KIND_COMMERCIAL, "commercial" },
416 { KIND_NOT_PRODUCT, "notproduct" },
514 #define C2_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DIAGNOSTIC) },
515 #define C2_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_EXPERIMENTAL) },
516 #define C2_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP) },
517 #define C2_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
518 #define C2_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_C2 | Flag::KIND_NOT_PRODUCT) },
519
520 #define ARCH_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_PRODUCT) },
521 #define ARCH_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DIAGNOSTIC) },
522 #define ARCH_EXPERIMENTAL_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_EXPERIMENTAL) },
523 #define ARCH_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_DEVELOP) },
524 #define ARCH_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_ARCH | Flag::KIND_NOT_PRODUCT) },
525
526 #define SHARK_PRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT) },
527 #define SHARK_PD_PRODUCT_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_PRODUCT | Flag::KIND_PLATFORM_DEPENDENT) },
528 #define SHARK_DIAGNOSTIC_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), &name, NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DIAGNOSTIC) },
529 #define SHARK_DEVELOP_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP) },
530 #define SHARK_PD_DEVELOP_FLAG_STRUCT( type, name, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_DEVELOP | Flag::KIND_PLATFORM_DEPENDENT) },
531 #define SHARK_NOTPRODUCT_FLAG_STRUCT( type, name, value, doc) { #type, XSTR(name), NAME(name), NOT_PRODUCT_ARG(doc) Flag::Flags(Flag::DEFAULT | Flag::KIND_SHARK | Flag::KIND_NOT_PRODUCT) },
532
533 static Flag flagTable[] = {
534 RUNTIME_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT, RUNTIME_LP64_PRODUCT_FLAG_STRUCT)
535 RUNTIME_OS_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT)
536 #if INCLUDE_ALL_GCS
537 G1_FLAGS(RUNTIME_DEVELOP_FLAG_STRUCT, RUNTIME_PD_DEVELOP_FLAG_STRUCT, RUNTIME_PRODUCT_FLAG_STRUCT, RUNTIME_PD_PRODUCT_FLAG_STRUCT, RUNTIME_DIAGNOSTIC_FLAG_STRUCT, RUNTIME_EXPERIMENTAL_FLAG_STRUCT, RUNTIME_NOTPRODUCT_FLAG_STRUCT, RUNTIME_MANAGEABLE_FLAG_STRUCT, RUNTIME_PRODUCT_RW_FLAG_STRUCT)
538 #endif // INCLUDE_ALL_GCS
539 #ifdef COMPILER1
540 C1_FLAGS(C1_DEVELOP_FLAG_STRUCT, C1_PD_DEVELOP_FLAG_STRUCT, C1_PRODUCT_FLAG_STRUCT, C1_PD_PRODUCT_FLAG_STRUCT, C1_DIAGNOSTIC_FLAG_STRUCT, C1_NOTPRODUCT_FLAG_STRUCT)
541 #endif
542 #ifdef COMPILER2
543 C2_FLAGS(C2_DEVELOP_FLAG_STRUCT, C2_PD_DEVELOP_FLAG_STRUCT, C2_PRODUCT_FLAG_STRUCT, C2_PD_PRODUCT_FLAG_STRUCT, C2_DIAGNOSTIC_FLAG_STRUCT, C2_EXPERIMENTAL_FLAG_STRUCT, C2_NOTPRODUCT_FLAG_STRUCT)
544 #endif
545 #ifdef SHARK
546 SHARK_FLAGS(SHARK_DEVELOP_FLAG_STRUCT, SHARK_PD_DEVELOP_FLAG_STRUCT, SHARK_PRODUCT_FLAG_STRUCT, SHARK_PD_PRODUCT_FLAG_STRUCT, SHARK_DIAGNOSTIC_FLAG_STRUCT, SHARK_NOTPRODUCT_FLAG_STRUCT)
547 #endif
548 ARCH_FLAGS(ARCH_DEVELOP_FLAG_STRUCT, ARCH_PRODUCT_FLAG_STRUCT, ARCH_DIAGNOSTIC_FLAG_STRUCT, ARCH_EXPERIMENTAL_FLAG_STRUCT, ARCH_NOTPRODUCT_FLAG_STRUCT)
549 FLAGTABLE_EXT
550 {0, NULL, NULL}
551 };
552
553 Flag* Flag::flags = flagTable;
554 size_t Flag::numFlags = (sizeof(flagTable) / sizeof(Flag));
555
556 inline bool str_equal(const char* s, const char* q, size_t len) {
557 // s is null terminated, q is not!
558 if (strlen(s) != (unsigned int) len) return false;
559 return strncmp(s, q, len) == 0;
560 }
561
562 // Search the flag table for a named flag
563 Flag* Flag::find_flag(const char* name, size_t length, bool allow_locked, bool return_flag) {
564 for (Flag* current = &flagTable[0]; current->_name != NULL; current++) {
565 if (str_equal(current->_name, name, length)) {
566 // Found a matching entry.
567 // Don't report notproduct and develop flags in product builds.
568 if (current->is_constant_in_binary()) {
569 return (return_flag == true ? current : NULL);
570 }
571 // Report locked flags only if allowed.
572 if (!(current->is_unlocked() || current->is_unlocker())) {
573 if (!allow_locked) {
574 // disable use of locked flags, e.g. diagnostic, experimental,
575 // commercial... until they are explicitly unlocked
576 return NULL;
577 }
578 }
579 return current;
580 }
581 }
582 // Flag name is not in the flag table
583 return NULL;
584 }
585
586 // Compute string similarity based on Dice's coefficient
587 static float str_similar(const char* str1, const char* str2, size_t len2) {
588 int len1 = (int) strlen(str1);
589 int total = len1 + (int) len2;
644 bool CommandLineFlagsEx::is_ergo(CommandLineFlag flag) {
645 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
646 Flag* f = &Flag::flags[flag];
647 return f->is_ergonomic();
648 }
649
650 bool CommandLineFlagsEx::is_cmdline(CommandLineFlag flag) {
651 assert((size_t)flag < Flag::numFlags, "bad command line flag index");
652 Flag* f = &Flag::flags[flag];
653 return f->is_command_line();
654 }
655
656 bool CommandLineFlags::wasSetOnCmdline(const char* name, bool* value) {
657 Flag* result = Flag::find_flag((char*)name, strlen(name));
658 if (result == NULL) return false;
659 *value = result->is_command_line();
660 return true;
661 }
662
663 template<class E, class T>
664 static void trace_flag_changed(const char* name, const T old_value, const T new_value, const Flag::Flags origin)
665 {
666 E e;
667 e.set_name(name);
668 e.set_old_value(old_value);
669 e.set_new_value(new_value);
670 e.set_origin(origin);
671 e.commit();
672 }
673
674 bool CommandLineFlags::boolAt(const char* name, size_t len, bool* value, bool allow_locked, bool return_flag) {
675 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
676 if (result == NULL) return false;
677 if (!result->is_bool()) return false;
678 *value = result->get_bool();
679 return true;
680 }
681
682 bool CommandLineFlags::boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin) {
683 Flag* result = Flag::find_flag(name, len);
684 if (result == NULL) return false;
685 if (!result->is_bool()) return false;
686 bool old_value = result->get_bool();
687 trace_flag_changed<EventBooleanFlagChanged, bool>(name, old_value, *value, origin);
688 result->set_bool(*value);
689 *value = old_value;
690 result->set_origin(origin);
691 return true;
692 }
693
694 void CommandLineFlagsEx::boolAtPut(CommandLineFlagWithType flag, bool value, Flag::Flags origin) {
695 Flag* faddr = address_of_flag(flag);
696 guarantee(faddr != NULL && faddr->is_bool(), "wrong flag type");
697 trace_flag_changed<EventBooleanFlagChanged, bool>(faddr->_name, faddr->get_bool(), value, origin);
698 faddr->set_bool(value);
699 faddr->set_origin(origin);
700 }
701
702 bool CommandLineFlags::intAt(const char* name, size_t len, int* value, bool allow_locked, bool return_flag) {
703 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
704 if (result == NULL) return false;
705 if (!result->is_int()) return false;
706 *value = result->get_int();
707 return true;
708 }
709
710 bool CommandLineFlags::intAtPut(const char* name, size_t len, int* value, Flag::Flags origin) {
711 Flag* result = Flag::find_flag(name, len);
712 if (result == NULL) return false;
713 if (!result->is_int()) return false;
714 int old_value = result->get_int();
715 trace_flag_changed<EventIntFlagChanged, s4>(name, old_value, *value, origin);
716 result->set_int(*value);
717 *value = old_value;
718 result->set_origin(origin);
719 return true;
720 }
721
722 void CommandLineFlagsEx::intAtPut(CommandLineFlagWithType flag, int value, Flag::Flags origin) {
723 Flag* faddr = address_of_flag(flag);
724 guarantee(faddr != NULL && faddr->is_int(), "wrong flag type");
725 trace_flag_changed<EventIntFlagChanged, s4>(faddr->_name, faddr->get_int(), value, origin);
726 faddr->set_int(value);
727 faddr->set_origin(origin);
728 }
729
730 bool CommandLineFlags::uintAt(const char* name, size_t len, uint* value, bool allow_locked, bool return_flag) {
731 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
732 if (result == NULL) return false;
733 if (!result->is_uint()) return false;
734 *value = result->get_uint();
735 return true;
736 }
737
738 bool CommandLineFlags::uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin) {
739 Flag* result = Flag::find_flag(name, len);
740 if (result == NULL) return false;
741 if (!result->is_uint()) return false;
742 uint old_value = result->get_uint();
743 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(name, old_value, *value, origin);
744 result->set_uint(*value);
745 *value = old_value;
746 result->set_origin(origin);
747 return true;
748 }
749
750 void CommandLineFlagsEx::uintAtPut(CommandLineFlagWithType flag, uint value, Flag::Flags origin) {
751 Flag* faddr = address_of_flag(flag);
752 guarantee(faddr != NULL && faddr->is_uint(), "wrong flag type");
753 trace_flag_changed<EventUnsignedIntFlagChanged, u4>(faddr->_name, faddr->get_uint(), value, origin);
754 faddr->set_uint(value);
755 faddr->set_origin(origin);
756 }
757
758 bool CommandLineFlags::intxAt(const char* name, size_t len, intx* value, bool allow_locked, bool return_flag) {
759 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
760 if (result == NULL) return false;
761 if (!result->is_intx()) return false;
762 *value = result->get_intx();
763 return true;
764 }
765
766 bool CommandLineFlags::intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin) {
767 Flag* result = Flag::find_flag(name, len);
768 if (result == NULL) return false;
769 if (!result->is_intx()) return false;
770 intx old_value = result->get_intx();
771 trace_flag_changed<EventLongFlagChanged, s8>(name, old_value, *value, origin);
772 result->set_intx(*value);
773 *value = old_value;
774 result->set_origin(origin);
775 return true;
776 }
777
778 void CommandLineFlagsEx::intxAtPut(CommandLineFlagWithType flag, intx value, Flag::Flags origin) {
779 Flag* faddr = address_of_flag(flag);
780 guarantee(faddr != NULL && faddr->is_intx(), "wrong flag type");
781 trace_flag_changed<EventLongFlagChanged, s8>(faddr->_name, faddr->get_intx(), value, origin);
782 faddr->set_intx(value);
783 faddr->set_origin(origin);
784 }
785
786 bool CommandLineFlags::uintxAt(const char* name, size_t len, uintx* value, bool allow_locked, bool return_flag) {
787 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
788 if (result == NULL) return false;
789 if (!result->is_uintx()) return false;
790 *value = result->get_uintx();
791 return true;
792 }
793
794 bool CommandLineFlags::uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin) {
795 Flag* result = Flag::find_flag(name, len);
796 if (result == NULL) return false;
797 if (!result->is_uintx()) return false;
798 uintx old_value = result->get_uintx();
799 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
800 result->set_uintx(*value);
801 *value = old_value;
802 result->set_origin(origin);
803 return true;
804 }
805
806 void CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType flag, uintx value, Flag::Flags origin) {
807 Flag* faddr = address_of_flag(flag);
808 guarantee(faddr != NULL && faddr->is_uintx(), "wrong flag type");
809 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uintx(), value, origin);
810 faddr->set_uintx(value);
811 faddr->set_origin(origin);
812 }
813
814 bool CommandLineFlags::uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked, bool return_flag) {
815 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
816 if (result == NULL) return false;
817 if (!result->is_uint64_t()) return false;
818 *value = result->get_uint64_t();
819 return true;
820 }
821
822 bool CommandLineFlags::uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin) {
823 Flag* result = Flag::find_flag(name, len);
824 if (result == NULL) return false;
825 if (!result->is_uint64_t()) return false;
826 uint64_t old_value = result->get_uint64_t();
827 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
828 result->set_uint64_t(*value);
829 *value = old_value;
830 result->set_origin(origin);
831 return true;
832 }
833
834 void CommandLineFlagsEx::uint64_tAtPut(CommandLineFlagWithType flag, uint64_t value, Flag::Flags origin) {
835 Flag* faddr = address_of_flag(flag);
836 guarantee(faddr != NULL && faddr->is_uint64_t(), "wrong flag type");
837 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_uint64_t(), value, origin);
838 faddr->set_uint64_t(value);
839 faddr->set_origin(origin);
840 }
841
842 bool CommandLineFlags::size_tAt(const char* name, size_t len, size_t* value, bool allow_locked, bool return_flag) {
843 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
844 if (result == NULL) return false;
845 if (!result->is_size_t()) return false;
846 *value = result->get_size_t();
847 return true;
848 }
849
850 bool CommandLineFlags::size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin) {
851 Flag* result = Flag::find_flag(name, len);
852 if (result == NULL) return false;
853 if (!result->is_size_t()) return false;
854 size_t old_value = result->get_size_t();
855 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(name, old_value, *value, origin);
856 result->set_size_t(*value);
857 *value = old_value;
858 result->set_origin(origin);
859 return true;
860 }
861
862 void CommandLineFlagsEx::size_tAtPut(CommandLineFlagWithType flag, size_t value, Flag::Flags origin) {
863 Flag* faddr = address_of_flag(flag);
864 guarantee(faddr != NULL && faddr->is_size_t(), "wrong flag type");
865 trace_flag_changed<EventUnsignedLongFlagChanged, u8>(faddr->_name, faddr->get_size_t(), value, origin);
866 faddr->set_size_t(value);
867 faddr->set_origin(origin);
868 }
869
870 bool CommandLineFlags::doubleAt(const char* name, size_t len, double* value, bool allow_locked, bool return_flag) {
871 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
872 if (result == NULL) return false;
873 if (!result->is_double()) return false;
874 *value = result->get_double();
875 return true;
876 }
877
878 bool CommandLineFlags::doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin) {
879 Flag* result = Flag::find_flag(name, len);
880 if (result == NULL) return false;
881 if (!result->is_double()) return false;
882 double old_value = result->get_double();
883 trace_flag_changed<EventDoubleFlagChanged, double>(name, old_value, *value, origin);
884 result->set_double(*value);
885 *value = old_value;
886 result->set_origin(origin);
887 return true;
888 }
889
890 void CommandLineFlagsEx::doubleAtPut(CommandLineFlagWithType flag, double value, Flag::Flags origin) {
891 Flag* faddr = address_of_flag(flag);
892 guarantee(faddr != NULL && faddr->is_double(), "wrong flag type");
893 trace_flag_changed<EventDoubleFlagChanged, double>(faddr->_name, faddr->get_double(), value, origin);
894 faddr->set_double(value);
895 faddr->set_origin(origin);
896 }
897
898 bool CommandLineFlags::ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked, bool return_flag) {
899 Flag* result = Flag::find_flag(name, len, allow_locked, return_flag);
900 if (result == NULL) return false;
901 if (!result->is_ccstr()) return false;
902 *value = result->get_ccstr();
903 return true;
904 }
905
906 bool CommandLineFlags::ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin) {
907 Flag* result = Flag::find_flag(name, len);
908 if (result == NULL) return false;
909 if (!result->is_ccstr()) return false;
910 ccstr old_value = result->get_ccstr();
911 trace_flag_changed<EventStringFlagChanged, const char*>(name, old_value, *value, origin);
912 char* new_value = NULL;
913 if (*value != NULL) {
914 new_value = os::strdup_check_oom(*value);
915 }
916 result->set_ccstr(new_value);
917 if (result->is_default() && old_value != NULL) {
918 // Prior value is NOT heap allocated, but was a literal constant.
919 old_value = os::strdup_check_oom(old_value);
920 }
921 *value = old_value;
922 result->set_origin(origin);
923 return true;
924 }
925
926 void CommandLineFlagsEx::ccstrAtPut(CommandLineFlagWithType flag, ccstr value, Flag::Flags origin) {
927 Flag* faddr = address_of_flag(flag);
928 guarantee(faddr != NULL && faddr->is_ccstr(), "wrong flag type");
929 ccstr old_value = faddr->get_ccstr();
930 trace_flag_changed<EventStringFlagChanged, const char*>(faddr->_name, old_value, value, origin);
931 char* new_value = os::strdup_check_oom(value);
932 faddr->set_ccstr(new_value);
933 if (!faddr->is_default() && old_value != NULL) {
934 // Prior value is heap allocated so free it.
935 FREE_C_HEAP_ARRAY(char, old_value);
936 }
937 faddr->set_origin(origin);
938 }
939
940 extern "C" {
941 static int compare_flags(const void* void_a, const void* void_b) {
942 return strcmp((*((Flag**) void_a))->_name, (*((Flag**) void_b))->_name);
943 }
944 }
945
946 void CommandLineFlags::printSetFlags(outputStream* out) {
947 // Print which flags were set on the command line
948 // note: this method is called before the thread structure is in place
949 // which means resource allocation cannot be used.
950
951 // The last entry is the null entry.
952 const size_t length = Flag::numFlags - 1;
953
954 // Sort
955 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
956 for (size_t i = 0; i < length; i++) {
957 array[i] = &flagTable[i];
958 }
959 qsort(array, length, sizeof(Flag*), compare_flags);
960
961 // Print
962 for (size_t i = 0; i < length; i++) {
963 if (array[i]->get_origin() /* naked field! */) {
964 array[i]->print_as_flag(out);
965 out->print(" ");
966 }
967 }
968 out->cr();
969 FREE_C_HEAP_ARRAY(Flag*, array);
970 }
971
972 #ifndef PRODUCT
973
974
975 void CommandLineFlags::verify() {
976 assert(Arguments::check_vm_args_consistency(), "Some flag settings conflict");
977 }
978
979 #endif // PRODUCT
980
981 void CommandLineFlags::printFlags(outputStream* out, bool withComments) {
982 // Print the flags sorted by name
983 // note: this method is called before the thread structure is in place
984 // which means resource allocation cannot be used.
985
986 // The last entry is the null entry.
987 const size_t length = Flag::numFlags - 1;
988
989 // Sort
990 Flag** array = NEW_C_HEAP_ARRAY(Flag*, length, mtInternal);
991 for (size_t i = 0; i < length; i++) {
992 array[i] = &flagTable[i];
993 }
994 qsort(array, length, sizeof(Flag*), compare_flags);
995
996 // Print
997 out->print_cr("[Global flags]");
998 for (size_t i = 0; i < length; i++) {
999 if (array[i]->is_unlocked()) {
1000 array[i]->print_on(out, withComments);
1001 }
1002 }
1003 FREE_C_HEAP_ARRAY(Flag*, array);
1004 }
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