Index: include/stddef.h =================================================================== --- include/stddef.h +++ include/stddef.h @@ -72,4 +72,12 @@ #define offsetof(type, member) __offsetof(type, member) +#if __EXT1_VISIBLE +/* ISO/IEC 9899:2011 K.3.3.2 */ +#ifndef _RSIZE_T_DECLARED +typedef size_t rsize_t; +#define _RSIZE_T_DECLARED +#endif +#endif /* __EXT1_VISIBLE */ + #endif /* _STDDEF_H_ */ Index: include/stdlib.h =================================================================== --- include/stdlib.h +++ include/stdlib.h @@ -323,6 +323,24 @@ extern char *suboptarg; /* getsubopt(3) external variable */ #endif /* __BSD_VISIBLE */ + +#if __EXT1_VISIBLE +/* K.3.6 */ +typedef void (*constraint_handler_t) (const char * restrict msg, + void * restrict ptr, + errno_t error); +/* K.3.6.1.1 */ +constraint_handler_t set_constraint_handler_s (constraint_handler_t + handler); +/* K.3.6.1.2 */ +void __attribute__((noreturn)) abort_handler_s(const char * restrict msg, + void * restrict ptr, + errno_t error); +/* K3.6.1.3 */ +void ignore_handler_s(const char * restrict msg, void * restrict ptr, + errno_t error); +#endif /* __EXT1_VISIBLE */ + __END_DECLS __NULLABILITY_PRAGMA_POP Index: include/string.h =================================================================== --- include/string.h +++ include/string.h @@ -141,6 +141,11 @@ #if __POSIX_VISIBLE >= 200809 || defined(_XLOCALE_H_) #include #endif + +#if __EXT1_VISIBLE +/* ISO/IEC 9899:2011 K.3.7.4.1.1 */ +errno_t memset_s(void *s, rsize_t smax, int c, rsize_t n); +#endif /* __EXT1_VISIBLE */ __END_DECLS #endif /* _STRING_H_ */ Index: lib/libc/stdlib/Makefile.inc =================================================================== --- lib/libc/stdlib/Makefile.inc +++ lib/libc/stdlib/Makefile.inc @@ -13,8 +13,8 @@ insque.c l64a.c labs.c ldiv.c llabs.c lldiv.c lsearch.c \ merge.c mergesort_b.c ptsname.c qsort.c qsort_r.c quick_exit.c \ radixsort.c rand.c \ - random.c reallocarray.c reallocf.c realpath.c remque.c strfmon.c \ - strtoimax.c \ + random.c reallocarray.c reallocf.c realpath.c remque.c \ + set_constraint_handler_s.c strfmon.c strtoimax.c \ strtol.c strtoll.c strtoq.c strtoul.c strtonum.c strtoull.c \ strtoumax.c strtouq.c system.c tdelete.c tfind.c tsearch.c twalk.c @@ -25,6 +25,8 @@ C99_Exit.c: ${LIBC_SRCTOP}/stdlib/_Exit.c .NOMETA ln -sf ${.ALLSRC} ${.TARGET} +CFLAGS.set_constraint_handler_s.c+= -D__STDC_WANT_LIB_EXT1__=1 + SYM_MAPS+= ${LIBC_SRCTOP}/stdlib/Symbol.map # machine-dependent stdlib sources Index: lib/libc/stdlib/Symbol.map =================================================================== --- lib/libc/stdlib/Symbol.map +++ lib/libc/stdlib/Symbol.map @@ -119,6 +119,9 @@ FBSD_1.5 { __cxa_thread_atexit; __cxa_thread_atexit_impl; + abort_handler_s; + ignore_handler_s; + set_constraint_handler_s; }; FBSDprivate_1.0 { Index: lib/libc/stdlib/set_constraint_handler_s.c =================================================================== --- /dev/null +++ lib/libc/stdlib/set_constraint_handler_s.c @@ -0,0 +1,71 @@ +/*- + * Copyright (c) 2017 Juniper Networks. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include + +/* rationale recommends allocating new memory each time */ +static constraint_handler_t *_ch = NULL; + +constraint_handler_t +set_constraint_handler_s(constraint_handler_t handler) +{ + constraint_handler_t ret = NULL; + + if (_ch != NULL) + ret = *_ch; + if (_ch == NULL) + _ch = (constraint_handler_t *) + malloc(sizeof(constraint_handler_t)); + if (_ch != NULL) + *_ch = handler; + return ret; +} + +void +__throw_constraint_handler_s(const char * restrict msg, errno_t error) +{ + + if (_ch && *_ch) + (*_ch)(msg, NULL, error); +} + +void +abort_handler_s(const char * restrict msg __unused, + void * restrict ptr __unused, errno_t error __unused) +{ + + abort(); +} + +void +ignore_handler_s(const char * restrict msg __unused, + void * restrict ptr __unused, errno_t error __unused) +{ +} Index: lib/libc/string/Makefile.inc =================================================================== --- lib/libc/string/Makefile.inc +++ lib/libc/string/Makefile.inc @@ -10,7 +10,7 @@ MISRCS+=bcmp.c bcopy.c bzero.c explicit_bzero.c \ ffs.c ffsl.c ffsll.c fls.c flsl.c flsll.c \ memccpy.c memchr.c memrchr.c memcmp.c \ - memcpy.c memmem.c memmove.c memset.c \ + memcpy.c memmem.c memmove.c memset.c memset_s.c \ stpcpy.c stpncpy.c strcasecmp.c \ strcat.c strcasestr.c strchr.c strchrnul.c strcmp.c strcoll.c strcpy.c\ strcspn.c strdup.c strerror.c strlcat.c strlcpy.c strlen.c strmode.c \ @@ -27,8 +27,9 @@ wmemcmp.c \ wmemcpy.c wmemmove.c wmemset.c -SYM_MAPS+= ${LIBC_SRCTOP}/string/Symbol.map +CFLAGS.memset_s.c+= -D__STDC_WANT_LIB_EXT1__=1 +SYM_MAPS+= ${LIBC_SRCTOP}/string/Symbol.map # machine-dependent string sources .sinclude "${LIBC_SRCTOP}/${LIBC_ARCH}/string/Makefile.inc" Index: lib/libc/string/Symbol.map =================================================================== --- lib/libc/string/Symbol.map +++ lib/libc/string/Symbol.map @@ -105,6 +105,7 @@ }; FBSD_1.5 { + memset_s; timingsafe_bcmp; timingsafe_memcmp; }; Index: lib/libc/string/memset_s.c =================================================================== --- /dev/null +++ lib/libc/string/memset_s.c @@ -0,0 +1,65 @@ +/*- + * Copyright (c) 2017 Juniper Networks. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include + +void __throw_constraint_handler_s(const char * restrict msg, + errno_t error); + +/* ISO/IEC 9899:2011 K.3.7.4.1 */ +errno_t +memset_s(void *s, rsize_t smax, int c, rsize_t n) +{ + errno_t ret; + rsize_t lim; + unsigned char v; + volatile unsigned char *dst; + + ret = EINVAL; + lim = smax; + v = (unsigned char)c; + dst = (unsigned char *)s; + if (s == NULL) { + __throw_constraint_handler_s("memset_s : s is NULL", ret); + } else if (smax > RSIZE_MAX) { + __throw_constraint_handler_s("memset_s : smax > RSIZE_MAX", + ret); + } else if (n > RSIZE_MAX) { + __throw_constraint_handler_s("memset_s : n > RSIZE_MAX", ret); + } else { + if (n < smax) + lim = n; + while (lim > 0) + dst[--lim] = v; + ret = 0; + } + return (ret); +} Index: lib/libc/tests/stdlib/Makefile =================================================================== --- lib/libc/tests/stdlib/Makefile +++ lib/libc/tests/stdlib/Makefile @@ -5,6 +5,7 @@ ATF_TESTS_C+= heapsort_test ATF_TESTS_C+= mergesort_test ATF_TESTS_C+= qsort_test +ATF_TESTS_C+= set_constraint_handler_s_test ATF_TESTS_C+= tsearch_test .if ${COMPILER_FEATURES:Mc++11} ATF_TESTS_CXX+= cxa_thread_atexit_test @@ -47,6 +48,8 @@ CFLAGS+= -I${.CURDIR} +CFLAGS.set_constraint_handler_s_test+= -D__STDC_WANT_LIB_EXT1__=1 + CXXFLAGS.cxa_thread_atexit_test+= -std=c++11 CXXFLAGS.cxa_thread_atexit_nothr_test+= -std=c++11 LIBADD.cxa_thread_atexit_test+= pthread Index: lib/libc/tests/stdlib/set_constraint_handler_s_test.c =================================================================== --- /dev/null +++ lib/libc/tests/stdlib/set_constraint_handler_s_test.c @@ -0,0 +1,64 @@ +/*- + * Copyright (c) 2017 Juniper Networks. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include + +#include +#include + +/* null */ +ATF_TC_WITHOUT_HEAD(null_handler); +ATF_TC_BODY(null_handler, tc) +{ + assert(set_constraint_handler_s(abort_handler_s) == NULL); +} + +/* abort handler */ +ATF_TC_WITHOUT_HEAD(abort_handler); +ATF_TC_BODY(abort_handler, tc) +{ + set_constraint_handler_s(abort_handler_s); + assert(set_constraint_handler_s(ignore_handler_s) == abort_handler_s); +} + +/* ignore handler */ +ATF_TC_WITHOUT_HEAD(ignore_handler); +ATF_TC_BODY(ignore_handler, tc) +{ + set_constraint_handler_s(ignore_handler_s); + assert(set_constraint_handler_s(abort_handler_s) == ignore_handler_s); +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, null_handler); + ATF_TP_ADD_TC(tp, abort_handler); + ATF_TP_ADD_TC(tp, ignore_handler); + return (atf_no_error()); +} Index: lib/libc/tests/string/Makefile =================================================================== --- lib/libc/tests/string/Makefile +++ lib/libc/tests/string/Makefile @@ -1,6 +1,7 @@ # $FreeBSD$ ATF_TESTS_C+= memcmp_test +ATF_TESTS_C+= memset_s_test ATF_TESTS_C+= stpncpy_test ATF_TESTS_C+= strerror2_test ATF_TESTS_C+= wcscasecmp_test @@ -30,6 +31,8 @@ .include "../Makefile.netbsd-tests" +CFLAGS.memset_s_test+= -D__STDC_WANT_LIB_EXT1__=1 + LIBADD.memchr_test+= md LIBADD.memcpy_test+= md Index: lib/libc/tests/string/memset_s_test.c =================================================================== --- /dev/null +++ lib/libc/tests/string/memset_s_test.c @@ -0,0 +1,185 @@ +/*- + * Copyright (c) 2017 Juniper Networks. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include + +#include +#include + +static errno_t e; +static const char * restrict m; + +void +h(const char * restrict msg, void * restrict ptr __unused, errno_t error) +{ + e = error; + m = msg; +} + +/* null ptr */ +ATF_TC_WITHOUT_HEAD(null_ptr); +ATF_TC_BODY(null_ptr, tc) +{ + assert(memset_s(0, 1, 1, 1) != 0); +} + +/* smax > rmax */ +ATF_TC_WITHOUT_HEAD(smax_gt_rmax); +ATF_TC_BODY(smax_gt_rmax, tc) +{ + char b; + assert(memset_s(&b, RSIZE_MAX + 1, 1, 1) != 0); +} + +/* smax < 0 */ +ATF_TC_WITHOUT_HEAD(smax_lt_zero); +ATF_TC_BODY(smax_lt_zero, tc) +{ + char b; + assert(memset_s(&b, -1, 1, 1) != 0); +} + +/* normal */ +ATF_TC_WITHOUT_HEAD(normal); +ATF_TC_BODY(normal, tc) +{ + char b = 3; + assert(memset_s(&b, 1, 5, 1) == 0); + assert(b == 5); +} + +/* n > rmax */ +ATF_TC_WITHOUT_HEAD(n_gt_rmax); +ATF_TC_BODY(n_gt_rmax, tc) +{ + char b; + assert(memset_s(&b, 1, 1, RSIZE_MAX + 1) != 0); +} + +/* n < 0 */ +ATF_TC_WITHOUT_HEAD(n_lt_zero); +ATF_TC_BODY(n_lt_zero, tc) +{ + char b; + assert(memset_s(&b, 1, 1, -1) != 0); +} + +/* n < smax */ +ATF_TC_WITHOUT_HEAD(n_lt_smax); +ATF_TC_BODY(n_lt_smax, tc) +{ + char b[3] = {1, 2, 3}; + assert(memset_s(&b[0], 3, 9, 1) == 0); + assert(b[0] == 9); + assert(b[1] == 2); + assert(b[2] == 3); +} + +/* n > smax */ +ATF_TC_WITHOUT_HEAD(n_gt_smax); +ATF_TC_BODY(n_gt_smax, tc) +{ + char b[3] = {1, 2, 3}; + assert(memset_s(&b[0], 1, 9, 3) == 0); + assert(b[0] == 9); + assert(b[1] == 2); + assert(b[2] == 3); +} + +/* smax > rmax, handler */ +ATF_TC_WITHOUT_HEAD(smax_gt_rmax_handler); +ATF_TC_BODY(smax_gt_rmax_handler, tc) +{ + char b; + e = 0; + m = NULL; + set_constraint_handler_s(h); + assert(memset_s(&b, RSIZE_MAX + 1, 1, 1) != 0); + assert(e > 0); + assert(strcmp(m, "memset_s : smax > RSIZE_MAX") == 0); +} + +/* smax < 0, handler */ +ATF_TC_WITHOUT_HEAD(smax_lt_zero_handler); +ATF_TC_BODY(smax_lt_zero_handler, tc) +{ + char b; + e = 0; + m = NULL; + set_constraint_handler_s(h); + assert(memset_s(&b, -1, 1, 1) != 0); + assert(e > 0); + assert(strcmp(m, "memset_s : smax > RSIZE_MAX") == 0); +} + +/* n > rmax, handler */ +ATF_TC_WITHOUT_HEAD(n_gt_rmax_handler); +ATF_TC_BODY(n_gt_rmax_handler, tc) +{ + char b; + e = 0; + m = NULL; + set_constraint_handler_s(h); + assert(memset_s(&b, 1, 1, RSIZE_MAX + 1) != 0); + assert(e > 0); + assert(strcmp(m, "memset_s : n > RSIZE_MAX") == 0); +} + +/* n < 0, handler */ +ATF_TC_WITHOUT_HEAD(n_lt_zero_handler); +ATF_TC_BODY(n_lt_zero_handler, tc) +{ + char b; + e = 0; + m = NULL; + set_constraint_handler_s(h); + assert(memset_s(&b, 1, 1, -1) != 0); + assert(e > 0); + assert(strcmp(m, "memset_s : n > RSIZE_MAX") == 0); +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, null_ptr); + ATF_TP_ADD_TC(tp, smax_gt_rmax); + ATF_TP_ADD_TC(tp, smax_lt_zero); + ATF_TP_ADD_TC(tp, normal); + ATF_TP_ADD_TC(tp, n_gt_rmax); + ATF_TP_ADD_TC(tp, n_lt_zero); + ATF_TP_ADD_TC(tp, n_gt_smax); + ATF_TP_ADD_TC(tp, n_lt_smax); + ATF_TP_ADD_TC(tp, smax_gt_rmax_handler); + ATF_TP_ADD_TC(tp, smax_lt_zero_handler); + ATF_TP_ADD_TC(tp, n_gt_rmax_handler); + ATF_TP_ADD_TC(tp, n_lt_zero_handler); + return (atf_no_error()); +} Index: sys/sys/cdefs.h =================================================================== --- sys/sys/cdefs.h +++ sys/sys/cdefs.h @@ -750,21 +750,32 @@ #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 1990 +#define __EXT1_VISIBLE 0 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ #define __POSIX_VISIBLE 0 #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 1999 +#define __EXT1_VISIBLE 0 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */ #define __POSIX_VISIBLE 0 #define __XSI_VISIBLE 0 #define __BSD_VISIBLE 0 #define __ISO_C_VISIBLE 2011 +#define __EXT1_VISIBLE 0 +#elif defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 +/* Localism to specify strict C11 Appendix K env. */ +#define __POSIX_VISIBLE 0 +#define __XSI_VISIBLE 0 +#define __BSD_VISIBLE 0 +#define __ISO_C_VISIBLE 2011 +#define __EXT1_VISIBLE 1 #else /* Default environment: show everything. */ #define __POSIX_VISIBLE 200809 #define __XSI_VISIBLE 700 #define __BSD_VISIBLE 1 #define __ISO_C_VISIBLE 2011 +#define __EXT1_VISIBLE 0 #endif #endif Index: sys/sys/errno.h =================================================================== --- sys/sys/errno.h +++ sys/sys/errno.h @@ -193,4 +193,9 @@ #define ERELOOKUP (-5) /* retry the directory lookup */ #endif +#if __EXT1_VISIBLE +/* ISO/IEC 9899:2011 K.3.2.2 */ +typedef int errno_t; +#endif /* __EXT1_VISIBLE */ + #endif Index: sys/sys/stdint.h =================================================================== --- sys/sys/stdint.h +++ sys/sys/stdint.h @@ -66,4 +66,11 @@ #define WCHAR_MIN __WCHAR_MIN #define WCHAR_MAX __WCHAR_MAX +#if __EXT1_VISIBLE +/* ISO/IEC 9899:2011 K.3.4.4 */ +#ifndef RSIZE_MAX +#define RSIZE_MAX (SIZE_MAX >> 1) +#endif +#endif /* __EXT1_VISIBLE */ + #endif /* !_SYS_STDINT_H_ */