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/*
* memcmp test.
*
* Copyright (c) 2019-2020, Arm Limited.
* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mte.h"
#include "stringlib.h"
#include "stringtest.h"
#define F(x, mte) {#x, x, mte},
static const struct fun
{
const char *name;
int (*fun) (const void *s1, const void *s2, size_t n);
int test_mte;
} funtab[] = {
// clang-format off
F(memcmp, 0)
#if __aarch64__
F(__memcmp_aarch64, 1)
# if __ARM_FEATURE_SVE
F(__memcmp_aarch64_sve, 1)
# endif
#endif
{0, 0, 0}
// clang-format on
};
#undef F
#define A 32
#define LEN 250000
static unsigned char *s1buf;
static unsigned char *s2buf;
static void *
alignup (void *p)
{
return (void *) (((uintptr_t) p + A - 1) & -A);
}
static void
test (const struct fun *fun, int s1align, int s2align, int len, int diffpos,
int delta)
{
unsigned char *src1 = alignup (s1buf);
unsigned char *src2 = alignup (s2buf);
unsigned char *s1 = src1 + s1align;
unsigned char *s2 = src2 + s2align;
int r;
if (err_count >= ERR_LIMIT)
return;
if (len > LEN || s1align >= A || s2align >= A)
abort ();
if (diffpos >= len)
abort ();
if ((diffpos < 0) != (delta == 0))
abort ();
for (int i = 0; i < len + A; i++)
src1[i] = src2[i] = '?';
for (int i = 0; i < len; i++)
s1[i] = s2[i] = 'a' + i % 23;
if (delta)
s1[diffpos] += delta;
s1 = tag_buffer (s1, len, fun->test_mte);
s2 = tag_buffer (s2, len, fun->test_mte);
r = fun->fun (s1, s2, len);
untag_buffer (s1, len, fun->test_mte);
untag_buffer (s2, len, fun->test_mte);
if ((delta == 0 && r != 0) || (delta > 0 && r <= 0) || (delta < 0 && r >= 0))
{
ERR ("%s(align %d, align %d, %d) failed, returned %d\n", fun->name,
s1align, s2align, len, r);
quoteat ("src1", src1, len + A, diffpos);
quoteat ("src2", src2, len + A, diffpos);
}
}
int
main ()
{
s1buf = mte_mmap (LEN + 2 * A);
s2buf = mte_mmap (LEN + 2 * A);
int r = 0;
for (int i = 0; funtab[i].name; i++)
{
err_count = 0;
for (int d = 0; d < A; d++)
for (int s = 0; s < A; s++)
{
int n;
test (funtab + i, d, s, 0, -1, 0);
test (funtab + i, d, s, 1, -1, 0);
test (funtab + i, d, s, 1, 0, -1);
test (funtab + i, d, s, 1, 0, 1);
for (n = 2; n < 100; n++)
{
test (funtab + i, d, s, n, -1, 0);
test (funtab + i, d, s, n, 0, -1);
test (funtab + i, d, s, n, n - 1, -1);
test (funtab + i, d, s, n, n / 2, 1);
}
for (; n < LEN; n *= 2)
{
test (funtab + i, d, s, n, -1, 0);
test (funtab + i, d, s, n, n / 2, -1);
}
}
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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