1 /*
2 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
3 * Copyright (c) 2016-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "tests.h"
30 #include <asm/unistd.h>
31
32 #ifdef HAVE_READAHEAD
33 /* Check for glibc readahead argument passing bugs. */
34 # ifdef __GLIBC__
35 /*
36 * glibc < 2.8 had an incorrect order of higher and lower parts of offset,
37 * see https://sourceware.org/bugzilla/show_bug.cgi?id=5208
38 */
39 # if !(defined __GLIBC_MINOR__ && \
40 (__GLIBC__ << 16) + __GLIBC_MINOR__ >= (2 << 16) + 8)
41 # undef HAVE_READAHEAD
42 # endif /* glibc < 2.8 */
43 /*
44 * glibc < 2.25 had an incorrect implementation on mips n64,
45 * see https://sourceware.org/bugzilla/show_bug.cgi?id=21026
46 */
47 # if defined LINUX_MIPSN64 && !(defined __GLIBC_MINOR__ && \
48 (__GLIBC__ << 16) + __GLIBC_MINOR__ >= (2 << 16) + 25)
49 # undef HAVE_READAHEAD
50 # endif /* LINUX_MIPSN64 && glibc < 2.25 */
51 # endif /* __GLIBC__ */
52 #endif /* HAVE_READAHEAD */
53
54 #ifdef HAVE_READAHEAD
55
56 # include <fcntl.h>
57 # include <stdio.h>
58
59 static const int fds[] = {
60 -0x80000000,
61 -100,
62 -1,
63 0,
64 1,
65 2,
66 0x7fffffff,
67 };
68
69 static const off64_t offsets[] = {
70 -0x8000000000000000LL,
71 -0x5060708090a0b0c0LL,
72 -1LL,
73 0,
74 1,
75 0xbadfaced,
76 0x7fffffffffffffffLL,
77 };
78
79 static const unsigned long counts[] = {
80 0UL,
81 0xdeadca75,
82 (unsigned long) 0xface1e55beeff00dULL,
83 (unsigned long) 0xffffffffffffffffULL,
84 };
85
86 int
main(void)87 main(void)
88 {
89 unsigned i;
90 unsigned j;
91 unsigned k;
92 ssize_t rc;
93
94 for (i = 0; i < ARRAY_SIZE(fds); i++)
95 for (j = 0; j < ARRAY_SIZE(offsets); j++)
96 for (k = 0; k < ARRAY_SIZE(counts); k++) {
97 rc = readahead(fds[i], offsets[j], counts[k]);
98
99 printf("readahead(%d, %lld, %lu) = %s\n",
100 fds[i], (long long) offsets[j],
101 counts[k], sprintrc(rc));
102 }
103
104 puts("+++ exited with 0 +++");
105 return 0;
106 }
107
108 #else
109
110 SKIP_MAIN_UNDEFINED("HAVE_READAHEAD")
111
112 #endif
113