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0ad77036d9
isc_meminfo_totalphys() would return invalid memory size when sysconf()
call would fail, because ((size_t)-1 * -1) is very large number.
(cherry picked from commit 79ca724d46)
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <inttypes.h>
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#include <unistd.h>
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#include <isc/meminfo.h>
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#if defined(HAVE_SYS_SYSCTL_H) && !defined(__linux__)
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#include <sys/sysctl.h>
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#endif /* if defined(HAVE_SYS_SYSCTL_H) && !defined(__linux__) */
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uint64_t
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isc_meminfo_totalphys(void) {
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#if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE))
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int mib[2];
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mib[0] = CTL_HW;
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#if defined(HW_MEMSIZE)
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mib[1] = HW_MEMSIZE;
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#elif defined(HW_PHYSMEM64)
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mib[1] = HW_PHYSMEM64;
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#endif /* if defined(HW_MEMSIZE) */
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uint64_t size = 0;
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size_t len = sizeof(size);
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if (sysctl(mib, 2, &size, &len, NULL, 0) == 0) {
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return (size);
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}
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#endif /* if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE)) \
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* */
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#if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
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long pages = sysconf(_SC_PHYS_PAGES);
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long pagesize = sysconf(_SC_PAGESIZE);
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if (pages == -1 || pagesize == -1) {
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return (0);
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}
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return ((size_t)pages * pagesize);
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#endif /* if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE) */
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return (0);
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}
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