/*
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
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* Copyright (c) 2016-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#ifdef HAVE_READAHEAD
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/* Check for glibc readahead argument passing bugs. */
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# ifdef __GLIBC__
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/*
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* glibc < 2.8 had an incorrect order of higher and lower parts of offset,
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* see https://sourceware.org/bugzilla/show_bug.cgi?id=5208
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*/
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# if !(defined __GLIBC_MINOR__ && \
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(__GLIBC__ << 16) + __GLIBC_MINOR__ >= (2 << 16) + 8)
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# undef HAVE_READAHEAD
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# endif /* glibc < 2.8 */
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/*
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* glibc < 2.25 had an incorrect implementation on mips n64,
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* see https://sourceware.org/bugzilla/show_bug.cgi?id=21026
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*/
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# if defined LINUX_MIPSN64 && !(defined __GLIBC_MINOR__ && \
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(__GLIBC__ << 16) + __GLIBC_MINOR__ >= (2 << 16) + 25)
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# undef HAVE_READAHEAD
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# endif /* LINUX_MIPSN64 && glibc < 2.25 */
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# endif /* __GLIBC__ */
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#endif /* HAVE_READAHEAD */
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#ifdef HAVE_READAHEAD
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# include <fcntl.h>
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# include <stdio.h>
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static const int fds[] = {
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-0x80000000,
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-100,
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-1,
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0,
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1,
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2,
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0x7fffffff,
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};
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static const off64_t offsets[] = {
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-0x8000000000000000LL,
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-0x5060708090a0b0c0LL,
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-1LL,
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0,
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1,
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0xbadfaced,
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0x7fffffffffffffffLL,
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};
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static const unsigned long counts[] = {
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0UL,
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0xdeadca75,
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(unsigned long) 0xface1e55beeff00dULL,
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(unsigned long) 0xffffffffffffffffULL,
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};
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int
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main(void)
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{
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unsigned i;
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unsigned j;
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unsigned k;
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ssize_t rc;
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for (i = 0; i < ARRAY_SIZE(fds); i++)
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for (j = 0; j < ARRAY_SIZE(offsets); j++)
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for (k = 0; k < ARRAY_SIZE(counts); k++) {
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rc = readahead(fds[i], offsets[j], counts[k]);
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printf("readahead(%d, %lld, %lu) = %s\n",
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fds[i], (long long) offsets[j],
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counts[k], sprintrc(rc));
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("HAVE_READAHEAD")
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#endif
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