1/*
2 * strchr test.
3 *
4 * Copyright (c) 2019-2020, 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  char *(*fun) (const char *s, int c);
23  int test_mte;
24} funtab[] = {
25  // clang-format off
26  F(strchr, 0)
27#if __aarch64__
28  F(__strchr_aarch64, 0)
29  F(__strchr_aarch64_mte, 1)
30# if __ARM_FEATURE_SVE
31  F(__strchr_aarch64_sve, 1)
32# endif
33#endif
34  {0, 0, 0}
35  // clang-format on
36};
37#undef F
38
39#define ALIGN 32
40#define LEN 512
41static char *sbuf;
42
43static void *
44alignup (void *p)
45{
46  return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
47}
48
49static void
50test (const struct fun *fun, int align, int seekpos, int len)
51{
52  char *src = alignup (sbuf);
53  char *s = src + align;
54  char *f = seekpos != -1 ? s + seekpos : 0;
55  int seekchar = 0x1;
56  void *p;
57
58  if (err_count >= ERR_LIMIT)
59    return;
60  if (len > LEN || seekpos >= len || align >= ALIGN)
61    abort ();
62
63  for (int i = 0; src + i < s; i++)
64    src[i] = (i + len) & 1 ? seekchar : 0;
65  for (int i = 1; i <= ALIGN; i++)
66     s[len + i] = (i + len) & 1 ? seekchar : 0;
67  for (int i = 0; i < len; i++)
68    s[i] = 'a' + (i & 31);
69  if (seekpos != -1)
70    s[seekpos] = seekchar;
71  if (seekpos != -1 && (len + align) & 1)
72    s[seekpos + 1] = seekchar;
73  s[len] = '\0';
74
75  s = tag_buffer (s, len + 1, fun->test_mte);
76  p = fun->fun (s, seekchar);
77  untag_buffer (s, len + 1, fun->test_mte);
78  p = untag_pointer (p);
79
80  if (p != f)
81    {
82      ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
83	   fun->name, s, seekchar, len, p, f, seekpos);
84      quote ("input", s, len);
85    }
86
87  s = tag_buffer (s, len + 1, fun->test_mte);
88  p = fun->fun (s, 0);
89  untag_buffer (s, len + 1, fun->test_mte);
90
91  if (p != s + len)
92    {
93      ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
94	   fun->name, s, 0, len, p, f, len);
95      quote ("input", s, len);
96    }
97}
98
99int
100main (void)
101{
102  sbuf = mte_mmap (LEN + 3 * ALIGN);
103  int r = 0;
104  for (int i = 0; funtab[i].name; i++)
105    {
106      err_count = 0;
107      for (int a = 0; a < ALIGN; a++)
108	for (int n = 0; n < LEN; n++)
109	  {
110	    for (int sp = 0; sp < n; sp++)
111	      test (funtab + i, a, sp, n);
112	    test (funtab + i, a, -1, n);
113	  }
114
115      char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
116      printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
117      if (err_count)
118	r = -1;
119    }
120  return r;
121}
122