1/*
2 * strlen test.
3 *
4 * Copyright (c) 2019-2022, Arm Limited.
5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6 */
7
8#include <stdint.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <string.h>
12#include <limits.h>
13#include "mte.h"
14#include "stringlib.h"
15#include "stringtest.h"
16
17#define F(x, mte) {#x, x, mte},
18
19static const struct fun
20{
21  const char *name;
22  size_t (*fun) (const char *s);
23  int test_mte;
24} funtab[] = {
25  // clang-format off
26  F(strlen, 0)
27#if __aarch64__
28  F(__strlen_aarch64, 0)
29  F(__strlen_aarch64_mte, 1)
30# if __ARM_FEATURE_SVE
31  F(__strlen_aarch64_sve, 1)
32# endif
33#elif __arm__
34# if __ARM_ARCH >= 6 && __ARM_ARCH_ISA_THUMB == 2
35  F(__strlen_armv6t2, 0)
36# endif
37#endif
38  {0, 0, 0}
39  // clang-format on
40};
41#undef F
42
43#define ALIGN 32
44#define LEN 512
45static char *sbuf;
46
47static void *
48alignup (void *p)
49{
50  return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
51}
52
53static void
54test (const struct fun *fun, int align, int len)
55{
56  char *src = alignup (sbuf);
57  char *s = src + align;
58  size_t r;
59
60  if (err_count >= ERR_LIMIT)
61    return;
62  if (len > LEN || align >= ALIGN)
63    abort ();
64
65  for (int i = 0; src + i < s; i++)
66    src[i] = 0;
67  for (int i = 1; i <= ALIGN; i++)
68    s[len + i] = (len + align) & 1 ? 1 : 0;
69  for (int i = 0; i < len; i++)
70    s[i] = 'a' + (i & 31);
71  s[len] = '\0';
72
73  s = tag_buffer (s, len + 1, fun->test_mte);
74  r = fun->fun (s);
75  untag_buffer (s, len + 1, fun->test_mte);
76
77  if (r != len)
78    {
79      ERR ("%s (%p) returned %zu expected %d\n", fun->name, s, r, len);
80      quote ("input", src, len);
81    }
82}
83
84int
85main (void)
86{
87  sbuf = mte_mmap (LEN + 3 * ALIGN);
88  int r = 0;
89  for (int i = 0; funtab[i].name; i++)
90    {
91      err_count = 0;
92      for (int a = 0; a < ALIGN; a++)
93	for (int n = 0; n < LEN; n++)
94	  test (funtab + i, a, n);
95
96      char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
97      printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
98      if (err_count)
99	r = -1;
100    }
101  return r;
102}
103