1/*
2 * strchrnul test.
3 *
4 * Copyright (c) 2019-2020, Arm Limited.
5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6 */
7
8#ifndef _GNU_SOURCE
9#define _GNU_SOURCE
10#endif
11
12#include <stdint.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <limits.h>
17#include "mte.h"
18#include "stringlib.h"
19#include "stringtest.h"
20
21#define F(x, mte) {#x, x, mte},
22
23static const struct fun
24{
25  const char *name;
26  char *(*fun) (const char *s, int c);
27  int test_mte;
28} funtab[] = {
29  // clang-format off
30  F(strchrnul, 0)
31#if __aarch64__
32  F(__strchrnul_aarch64, 0)
33  F(__strchrnul_aarch64_mte, 1)
34# if __ARM_FEATURE_SVE
35  F(__strchrnul_aarch64_sve, 1)
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 seekpos, int len)
55{
56  char *src = alignup (sbuf);
57  char *s = src + align;
58  char *f = seekpos != -1 ? s + seekpos : s + len;
59  int seekchar = 0x1;
60  void *p;
61
62  if (err_count >= ERR_LIMIT)
63    return;
64  if (len > LEN || seekpos >= len || align >= ALIGN)
65    abort ();
66
67  for (int i = 0; src + i < s; i++)
68    src[i] = (i + len) & 1 ? seekchar : 0;
69  for (int i = 1; i <= ALIGN; i++)
70    s[len + i] = (i + len) & 1 ? seekchar : 0;
71  for (int i = 0; i < len; i++)
72    s[i] = 'a' + (i & 31);
73  if (seekpos != -1)
74    s[seekpos] = seekchar;
75  if (seekpos != -1 && (len + align) & 1)
76    s[seekpos + 1] = seekchar;
77  s[len] = '\0';
78
79  int mte_len = seekpos != -1 ? seekpos + 1 : len + 1;
80  s = tag_buffer (s, mte_len, fun->test_mte);
81  p = fun->fun (s, seekchar);
82  untag_buffer (s, mte_len, fun->test_mte);
83  p = untag_pointer (p);
84
85  if (p != f)
86    {
87      ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
88	   fun->name, s, seekchar, len, p, f, seekpos);
89      quote ("input", s, len);
90    }
91
92  s = tag_buffer (s, len + 1, fun->test_mte);
93  p = fun->fun (s, 0);
94  untag_buffer (s, len + 1, fun->test_mte);
95
96  if (p != s + len)
97    {
98      ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
99	   fun->name, s, 0, len, p, f, len);
100      quote ("input", s, len);
101    }
102}
103
104int
105main (void)
106{
107  sbuf = mte_mmap (LEN + 3 * ALIGN);
108  int r = 0;
109  for (int i = 0; funtab[i].name; i++)
110    {
111      err_count = 0;
112      for (int a = 0; a < ALIGN; a++)
113	for (int n = 0; n < LEN; n++)
114	  {
115	    for (int sp = 0; sp < n; sp++)
116	      test (funtab + i, a, sp, n);
117	    test (funtab + i, a, -1, n);
118	  }
119
120      char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
121      printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
122      if (err_count)
123	r = -1;
124    }
125  return r;
126}
127