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/*
* __mtag_tag_region test.
*
* Copyright (c) 2021, Arm Limited.
* SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
*/
#if __ARM_FEATURE_MEMORY_TAGGING && WANT_MTE_TEST
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mte.h"
#include "stringlib.h"
#include "stringtest.h"
static void
mtag_quoteat (const char *prefix, void *p, int len, int at)
{
/* Print tag, untag and quote the context. */
printf ("location: %p\n", __arm_mte_get_tag ((char *) p + at));
untag_buffer (p, len, 1);
p = untag_pointer (p);
quoteat (prefix, p, len, at);
}
#define F(x) {#x, x},
static const struct fun
{
const char *name;
void *(*fun) (void *s, size_t n);
} funtab[] = {
// clang-format off
#if __aarch64__
F(__mtag_tag_region)
#endif
{0, 0}
// clang-format on
};
#undef F
#define A 64
#define LEN 250000
static unsigned char *sbuf;
static void *
alignup (void *p)
{
return (void *) (((uintptr_t) p + A - 1) & -A);
}
static void
test (const struct fun *fun, int salign, int len)
{
unsigned char *src = alignup (sbuf);
unsigned char *s = src + salign;
void *p;
int i;
if (err_count >= ERR_LIMIT)
return;
if (len > LEN || salign >= A)
abort ();
for (i = 0; i < len + 2 * A; i++)
src[i] = '?';
for (i = 0; i < len; i++)
s[i] = 'a';
src = tag_buffer (src, len + 2 * A, 1);
s = src + salign;
/* Use different tag. */
s = __arm_mte_increment_tag (s, 1);
p = fun->fun (s, len);
if (p != s)
ERR ("%s(%p,..) returned %p\n", fun->name, s, p);
for (i = 0; i < salign; i++)
{
if (src[i] != '?')
{
ERR ("%s(align %d, %d) failed\n", fun->name, salign, len);
mtag_quoteat ("got head", src, len + 2 * A, i);
return;
}
}
for (; i < salign + len; i++)
{
if (s[i - salign] != 'a')
{
ERR ("%s(align %d, %d) failed\n", fun->name, salign, len);
mtag_quoteat ("got body", src, len + 2 * A, i);
return;
}
}
for (; i < len + 2 * A; i++)
{
if (src[i] != '?')
{
ERR ("%s(align %d, %d) failed\n", fun->name, salign, len);
mtag_quoteat ("got tail", src, len + 2 * A, i);
return;
}
}
untag_buffer (src, len + 2 * A, 1);
}
int
main ()
{
if (!mte_enabled ())
return 0;
sbuf = mte_mmap (LEN + 3 * A);
int r = 0;
for (int i = 0; funtab[i].name; i++)
{
err_count = 0;
for (int s = 0; s < A; s += 16)
{
int n;
for (n = 0; n < 200; n += 16)
{
test (funtab + i, s, n);
}
for (; n < LEN; n *= 2)
{
test (funtab + i, s, n);
}
}
printf ("%s %s\n", err_count ? "FAIL" : "PASS", funtab[i].name);
if (err_count)
r = -1;
}
return r;
}
#else
int
main ()
{
return 0;
}
#endif
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