1 /* Measure string and memory functions.
2 Copyright (C) 2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #include <sys/cdefs.h>
27 extern impl_t __start_impls
[], __stop_impls
[];
29 #define IMPL(name, test) \
31 __attribute__ ((section ("impls"), aligned (sizeof (void *)))) \
32 = { __STRING (name), (void (*) (void))name, test };
40 # undef __USE_STRING_INLINES
45 # include <sys/mman.h>
46 # include <sys/param.h>
52 # include <ifunc-impl-list.h>
55 # include <hp-timing.h>
58 # define TEST_FUNCTION test_main ()
59 # define TIMEOUT (4 * 60)
60 # define OPT_ITERATIONS 10000
61 # define OPT_RANDOM 10001
62 # define OPT_SEED 10002
64 unsigned char *buf1
, *buf2
;
69 hp_timing_t _dl_hp_timing_overhead
;
72 size_t iterations
= 100000;
73 # define ITERATIONS_OPTIONS \
74 { "iterations", required_argument, NULL, OPT_ITERATIONS },
75 # define ITERATIONS_PROCESS \
76 case OPT_ITERATIONS: \
77 iterations = strtoul (optarg, NULL, 0); \
79 # define ITERATIONS iterations
81 # define ITERATIONS_OPTIONS
82 # define ITERATIONS_PROCESS
85 # define CMDLINE_OPTIONS ITERATIONS_OPTIONS \
86 { "random", no_argument, NULL, OPT_RANDOM }, \
87 { "seed", required_argument, NULL, OPT_SEED },
88 # define CMDLINE_PROCESS ITERATIONS_PROCESS \
91 int fdr = open ("/dev/urandom", O_RDONLY); \
93 if (fdr < 0 || read (fdr, &seed, sizeof(seed)) != sizeof (seed)) \
102 seed = strtoul (optarg, NULL, 0); \
106 # define CALL(impl, ...) \
107 (* (proto_t) (impl)->fn) (__VA_ARGS__)
109 # if defined TEST_IFUNC && defined TEST_NAME
110 /* Increase size of FUNC_LIST if assert is triggered at run-time. */
111 static struct libc_ifunc_impl func_list
[32];
112 static int func_count
;
113 static int impl_count
= -1;
114 static impl_t
*impl_array
;
116 # define FOR_EACH_IMPL(impl, notall) \
119 if (impl_count == -1) \
122 if (func_count != 0) \
125 impl_t *skip = NULL, *a; \
126 for (impl = __start_impls; impl < __stop_impls; ++impl) \
127 if (strcmp (impl->name, TEST_NAME) == 0) \
131 a = impl_array = malloc ((impl_count + func_count) * \
133 for (impl = __start_impls; impl < __stop_impls; ++impl) \
136 for (f = 0; f < func_count; f++) \
137 if (func_list[f].usable) \
139 a->name = func_list[f].name; \
140 a->fn = func_list[f].fn; \
144 impl_count = a - impl_array; \
148 impl_count = __stop_impls - __start_impls; \
149 impl_array = __start_impls; \
153 for (count = 0; count < impl_count; ++count, ++impl) \
154 if (!notall || impl->test)
155 # else /* ! (defined TEST_IFUNC && defined TEST_NAME) */
156 # define FOR_EACH_IMPL(impl, notall) \
157 for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl) \
158 if (!notall || impl->test)
159 # endif /* ! (defined TEST_IFUNC && defined TEST_NAME) */
161 # define HP_TIMING_BEST(best_time, start, end) \
164 hp_timing_t tmptime; \
165 HP_TIMING_DIFF (tmptime, start + _dl_hp_timing_overhead, end); \
166 if (best_time > tmptime) \
167 best_time = tmptime; \
178 # if defined TEST_IFUNC && defined TEST_NAME
179 func_count
= __libc_ifunc_impl_list (TEST_NAME
, func_list
,
181 / sizeof func_list
[0]));
184 page_size
= 2 * getpagesize ();
185 # ifdef MIN_PAGE_SIZE
186 if (page_size
< MIN_PAGE_SIZE
)
187 page_size
= MIN_PAGE_SIZE
;
189 buf1
= mmap (0, (BUF1PAGES
+ 1) * page_size
, PROT_READ
| PROT_WRITE
,
190 MAP_PRIVATE
| MAP_ANON
, -1, 0);
191 if (buf1
== MAP_FAILED
)
192 error (EXIT_FAILURE
, errno
, "mmap failed");
193 if (mprotect (buf1
+ BUF1PAGES
* page_size
, page_size
, PROT_NONE
))
194 error (EXIT_FAILURE
, errno
, "mprotect failed");
195 buf2
= mmap (0, 2 * page_size
, PROT_READ
| PROT_WRITE
,
196 MAP_PRIVATE
| MAP_ANON
, -1, 0);
197 if (buf2
== MAP_FAILED
)
198 error (EXIT_FAILURE
, errno
, "mmap failed");
199 if (mprotect (buf2
+ page_size
, page_size
, PROT_NONE
))
200 error (EXIT_FAILURE
, errno
, "mprotect failed");
201 HP_TIMING_DIFF_INIT ();
204 printf ("Setting seed to 0x%x\n", seed
);
208 memset (buf1
, 0xa5, BUF1PAGES
* page_size
);
209 memset (buf2
, 0x5a, page_size
);
212 #endif /* TEST_MAIN */