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/*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#ifdef HAVE_READAHEAD
/* Check for glibc readahead argument passing bugs. */
/*
* glibc < 2.8 had an incorrect order of higher and lower parts of offset,
* see https://sourceware.org/bugzilla/show_bug.cgi?id=5208
*/
# if GLIBC_PREREQ_LT(2, 8)
# undef HAVE_READAHEAD
# endif /* glibc < 2.8 */
/*
* glibc < 2.25 had an incorrect implementation on mips n64,
* see https://sourceware.org/bugzilla/show_bug.cgi?id=21026
*/
# if GLIBC_PREREQ_LT(2, 25) && defined LINUX_MIPSN64
# undef HAVE_READAHEAD
# endif /* LINUX_MIPSN64 && glibc < 2.25 */
#endif /* HAVE_READAHEAD */
#ifdef HAVE_READAHEAD
# include <fcntl.h>
# include <stdio.h>
static const int fds[] = {
-0x80000000,
-100,
-1,
0,
1,
2,
0x7fffffff,
};
static const off64_t offsets[] = {
-0x8000000000000000LL,
-0x5060708090a0b0c0LL,
-1LL,
0,
1,
0xbadfaced,
0x7fffffffffffffffLL,
};
static const unsigned long counts[] = {
0UL,
0xdeadca75,
(unsigned long) 0xface1e55beeff00dULL,
(unsigned long) 0xffffffffffffffffULL,
};
int
main(void)
{
ssize_t rc;
for (unsigned int i = 0; i < ARRAY_SIZE(fds); ++i)
for (unsigned int j = 0; j < ARRAY_SIZE(offsets); ++j)
for (unsigned int k = 0; k < ARRAY_SIZE(counts); ++k) {
rc = readahead(fds[i], offsets[j], counts[k]);
printf("readahead(%d, %lld, %lu) = %s\n",
fds[i], (long long) offsets[j],
counts[k], sprintrc(rc));
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("HAVE_READAHEAD")
#endif
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