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/* Measure string and memory functions.
Copyright (C) 2013-2018 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
<http://www.gnu.org/licenses/>. */
#include <getopt.h>
#include <sys/cdefs.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"
# 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 64
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 = malloc ((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 */
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