about summary refs log tree commit diff
path: root/benchtests/bench-string.h
blob: 12f27473ff5714e50a94f3f1c5b06a56b99bc742 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/* Measure string and memory functions.
   Copyright (C) 2013-2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <getopt.h>
#include <sys/cdefs.h>
#include <programs/xmalloc.h>

/* We are compiled under _ISOMAC, so libc-symbols.h does not do this
   for us.  */
#include "config.h"
#ifdef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL
# define inhibit_loop_to_libcall \
    __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
#else
# define inhibit_loop_to_libcall
#endif

typedef struct
{
  const char *name;
  void (*fn) (void);
  long test;
} impl_t;
extern impl_t __start_impls[], __stop_impls[];

#define IMPL(name, test) \
  impl_t tst_ ## name							\
  __attribute__ ((section ("impls"), aligned (sizeof (void *))))	\
       = { __STRING (name), (void (*) (void))name, test };

#ifdef TEST_MAIN

# ifndef _GNU_SOURCE
#  define _GNU_SOURCE
# endif

# undef __USE_STRING_INLINES

# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <sys/mman.h>
# include <sys/param.h>
# include <unistd.h>
# include <fcntl.h>
# include <error.h>
# include <errno.h>
# include <time.h>
# include <ifunc-impl-list.h>
# define GL(x) _##x
# define GLRO(x) _##x
# include "bench-timing.h"

# ifndef WIDE
#  define CHAR char
#  define UCHAR unsigned char
#  define CHARBYTES 1
#  define MAX_CHAR CHAR_MAX
#  define MEMCHR memchr
#  define MEMCMP memcmp
#  define MEMCPY memcpy
#  define MEMSET memset
#  define STRCAT strcat
#  define STRLEN strlen
#  define STRCMP strcmp
#  define STRCHR strchr
#  define STRCPY strcpy
#  define STRNLEN strnlen
#  define STRCSPN strcspn
#  define STRNCAT strncat
#  define STRNCMP strncmp
#  define STRNCPY strncpy
#  define STRPBRK strpbrk
#  define STRRCHR strrchr
#  define STRSPN strspn
#  define STPCPY stpcpy
#  define STPNCPY stpncpy
# else
#  include <wchar.h>
#  define CHAR wchar_t
#  define UCHAR wchar_t
#  define CHARBYTES 4
#  define MAX_CHAR WCHAR_MAX
#  define MEMCHR wmemchr
#  define MEMCMP wmemcmp
#  define MEMCPY wmemcpy
#  define MEMSET wmemset
#  define STRCAT wcscat
#  define STRLEN wcslen
#  define STRCMP wcscmp
#  define STRCHR wcschr
#  define STRCPY wcscpy
#  define STRNLEN wcsnlen
#  define STRCSPN wcscspn
#  define STRNCAT wcsncat
#  define STRNCMP wcsncmp
#  define STRNCPY wcsncpy
#  define STRPBRK wcspbrk
#  define STRRCHR wcsrchr
#  define STRSPN wcsspn
#  define STPCPY wcpcpy
#  define STPNCPY wcpncpy
# endif /* WIDE */

# define TEST_FUNCTION test_main
# ifndef TIMEOUT
#  define TIMEOUT (4 * 60)
# endif
# define OPT_ITERATIONS 10000
# define OPT_RANDOM 10001
# define OPT_SEED 10002

# define INNER_LOOP_ITERS 8192
# define INNER_LOOP_ITERS8 32768
# define INNER_LOOP_ITERS_LARGE 131072
# define INNER_LOOP_ITERS_MEDIUM 2048
# define INNER_LOOP_ITERS_SMALL 256

int ret, do_srandom;
unsigned int seed;

# ifndef ITERATIONS
size_t iterations = 100000;
#  define ITERATIONS_OPTIONS \
     { "iterations", required_argument, NULL, OPT_ITERATIONS },
#  define ITERATIONS_PROCESS \
     case OPT_ITERATIONS:						      \
       iterations = strtoul (optarg, NULL, 0);				      \
       break;
#  define ITERATIONS iterations
# else
#  define ITERATIONS_OPTIONS
#  define ITERATIONS_PROCESS
# endif

# define CMDLINE_OPTIONS ITERATIONS_OPTIONS \
    { "random", no_argument, NULL, OPT_RANDOM },			      \
    { "seed", required_argument, NULL, OPT_SEED },

static void __attribute__ ((used))
cmdline_process_function (int c)
{
  switch (c)
    {
      ITERATIONS_PROCESS
      case OPT_RANDOM:
	{
	  int fdr = open ("/dev/urandom", O_RDONLY);
	  if (fdr < 0 || read (fdr, &seed, sizeof (seed)) != sizeof (seed))
	    seed = time (NULL);
	  if (fdr >= 0)
	    close (fdr);
	  do_srandom = 1;
	  break;
	}

      case OPT_SEED:
	seed = strtoul (optarg, NULL, 0);
	do_srandom = 1;
      break;
    }
}
# define CMDLINE_PROCESS cmdline_process_function
# define CALL(impl, ...)	\
    (* (proto_t) (impl)->fn) (__VA_ARGS__)

# ifdef TEST_NAME
/* Increase size of FUNC_LIST if assert is triggered at run-time.  */
static struct libc_ifunc_impl func_list[32];
static int func_count;
static int impl_count = -1;
static impl_t *impl_array;

#  define FOR_EACH_IMPL(impl, notall) \
     impl_t *impl;							      \
     int count;								      \
     if (impl_count == -1)						      \
       {								      \
	 impl_count = 0;						      \
	 if (func_count != 0)						      \
	   {								      \
	     int f;							      \
	     impl_t *skip = NULL, *a;					      \
	     for (impl = __start_impls; impl < __stop_impls; ++impl)	      \
	       if (strcmp (impl->name, TEST_NAME) == 0)			      \
		 skip = impl;						      \
	       else							      \
		 impl_count++;						      \
	     a = impl_array = xmalloc ((impl_count + func_count) *	      \
				       sizeof (impl_t));		      \
	     for (impl = __start_impls; impl < __stop_impls; ++impl)	      \
	       if (impl != skip)					      \
		 *a++ = *impl;						      \
	     for (f = 0; f < func_count; f++)				      \
	       if (func_list[f].usable)					      \
		 {							      \
		   a->name = func_list[f].name;				      \
		   a->fn = func_list[f].fn;				      \
		   a->test = 1;						      \
		   a++;							      \
		 }							      \
	     impl_count = a - impl_array;				      \
	   }								      \
	 else								      \
	   {								      \
	     impl_count = __stop_impls - __start_impls;			      \
	     impl_array = __start_impls;				      \
	   }								      \
       }								      \
     impl = impl_array;							      \
     for (count = 0; count < impl_count; ++count, ++impl)		      \
       if (!notall || impl->test)
# else /* !TEST_NAME */
#  define FOR_EACH_IMPL(impl, notall) \
     for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl)	      \
       if (!notall || impl->test)
# endif /* !TEST_NAME */

# ifndef BUF1PAGES
#  define BUF1PAGES 1
# endif

unsigned char *buf1, *buf2;
static size_t buf1_size, buf2_size, page_size;

static void
init_sizes (void)
{
  page_size = 2 * getpagesize ();
# ifdef MIN_PAGE_SIZE
  if (page_size < MIN_PAGE_SIZE)
    page_size = MIN_PAGE_SIZE;
# endif

  buf1_size = BUF1PAGES * page_size;
  buf2_size = page_size;
}

static void
exit_error (const char *id, const char *func)
{
  error (EXIT_FAILURE, errno, "%s: %s failed", id, func);
}

/* Allocate a buffer of size SIZE with a guard page at the end.  */
static void
alloc_buf (const char *id, size_t size, unsigned char **retbuf)
{
  size_t alloc_size = size + page_size;

  if (*retbuf != NULL)
    {
	int ret = munmap (*retbuf, alloc_size);
	if (ret != 0)
	  exit_error (id, "munmap");
    }

  unsigned char *buf = mmap (0, alloc_size, PROT_READ | PROT_WRITE,
			     MAP_PRIVATE | MAP_ANON, -1, 0);

  if (buf == MAP_FAILED)
    exit_error (id, "mmap");
  if (mprotect (buf + size, page_size, PROT_NONE))
    exit_error (id, "mprotect");

  *retbuf = buf;
}

static void
alloc_bufs (void)
{
  alloc_buf ("buf1", buf1_size, &buf1);
  alloc_buf ("buf2", buf2_size, &buf2);
}

static void
test_init (void)
{
# ifdef TEST_NAME
  func_count = __libc_ifunc_impl_list (TEST_NAME, func_list,
				       (sizeof func_list
					/ sizeof func_list[0]));
# endif

  init_sizes ();
  alloc_bufs ();

  if (do_srandom)
    {
      printf ("Setting seed to 0x%x\n", seed);
      srandom (seed);
    }
}

#endif /* TEST_MAIN */