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/*
* memchr test.
*
* Copyright (c) 2020, Arm Limited.
* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "mte.h"
#include "stringlib.h"
#include "stringtest.h"
#define F(x, mte) {#x, x, mte},
static const struct fun
{
const char *name;
void *(*fun) (const void *s, int c, size_t n);
int test_mte;
} funtab[] = {
// clang-format off
F(memrchr, 0)
#if __aarch64__
F(__memrchr_aarch64, 1)
#endif
{0, 0, 0}
// clang-format on
};
#undef F
#define ALIGN 32
#define LEN 512
static char *sbuf;
static void *
alignup (void *p)
{
return (void *) (((uintptr_t) p + ALIGN) & -ALIGN);
}
static void
test (const struct fun *fun, int align, size_t seekpos, size_t len,
size_t maxlen)
{
char *src = alignup (sbuf);
char *s = src + align;
char *f = seekpos < maxlen ? s + seekpos : NULL;
int seekchar = 1;
void *p;
if (err_count >= ERR_LIMIT)
return;
if (len > LEN || seekpos > LEN || align > ALIGN)
abort ();
for (int i = 0; src + i < s; i++)
src[i] = seekchar;
for (int i = 0; i <= ALIGN; i++)
s[len + i] = seekchar;
for (int i = 0; i < len; i++)
s[i] = 'a' + (i & 31);
s[seekpos] = seekchar;
s[((len ^ align) & 1) && seekpos < maxlen ? seekpos - 1 : len] = seekchar;
s = tag_buffer (s, maxlen, fun->test_mte);
p = fun->fun (s, seekchar, maxlen);
untag_buffer (s, maxlen, fun->test_mte);
p = untag_pointer (p);
if (p != f)
{
ERR ("%s (%p, 0x%02x, %zu) returned %p, expected %p\n", fun->name, s,
seekchar, maxlen, p, f);
quote ("input", s, len);
}
}
int
main (void)
{
sbuf = mte_mmap (LEN + 3 * ALIGN);
int r = 0;
for (int i = 0; funtab[i].name; i++)
{
err_count = 0;
for (int a = 0; a < ALIGN; a++)
for (int n = 0; n < LEN; n++)
{
for (int sp = 0; sp < LEN; sp++)
test (funtab + i, a, sp, n, n);
}
char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
if (err_count)
r = -1;
}
return r;
}
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