1/*
2 * strcpy 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 "mte.h"
13#include "stringlib.h"
14#include "stringtest.h"
15
16#define F(x, mte) {#x, x, mte},
17
18static const struct fun
19{
20  const char *name;
21  char *(*fun) (char *dest, const char *src);
22  int test_mte;
23} funtab[] = {
24  // clang-format off
25  F(strcpy, 0)
26#if __aarch64__
27  F(__strcpy_aarch64, 1)
28# if __ARM_FEATURE_SVE
29  F(__strcpy_aarch64_sve, 1)
30# endif
31#elif __arm__ && defined (__thumb2__) && !defined (__thumb__)
32  F(__strcpy_arm, 0)
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 *dbuf;
42static char *sbuf;
43static char wbuf[LEN + 3 * ALIGN];
44
45static void *
46alignup (void *p)
47{
48  return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
49}
50
51static void
52test (const struct fun *fun, int dalign, int salign, int len)
53{
54  char *src = alignup (sbuf);
55  char *dst = alignup (dbuf);
56  char *want = wbuf;
57  char *s = src + salign;
58  char *d = dst + dalign;
59  char *w = want + dalign;
60  void *p;
61  int i;
62
63  if (err_count >= ERR_LIMIT)
64    return;
65  if (len > LEN || dalign >= ALIGN || salign >= ALIGN)
66    abort ();
67  for (i = 0; i < len + ALIGN; i++)
68    {
69      src[i] = '?';
70      want[i] = dst[i] = '*';
71    }
72  for (int i = 0; src + i < s; i++)
73    src[i] = 0;
74  for (int i = 1; i <= ALIGN; i++)
75    s[len + i] = (len + salign) & 1 ? 1 : 0;
76  for (i = 0; i < len; i++)
77    s[i] = w[i] = 'a' + (i & 31);
78  s[len] = w[len] = '\0';
79
80  s = tag_buffer (s, len + 1, fun->test_mte);
81  d = tag_buffer (d, len + 1, fun->test_mte);
82  p = fun->fun (d, s);
83  untag_buffer (s, len + 1, fun->test_mte);
84  untag_buffer (d, len + 1, fun->test_mte);
85
86  if (p != d)
87    ERR ("%s (%p,..) returned %p\n", fun->name, d, p);
88
89  for (i = 0; i < len + ALIGN; i++)
90    {
91      if (dst[i] != want[i])
92	{
93	  ERR ("%s (align %d, align %d, %d) failed\n",
94	       fun->name, dalign, salign, len);
95	  quoteat ("got", dst, len + ALIGN, i);
96	  quoteat ("want", want, len + ALIGN, i);
97	  break;
98	}
99    }
100}
101
102int
103main (void)
104{
105  sbuf = mte_mmap (LEN + 3 * ALIGN);
106  dbuf = mte_mmap (LEN + 3 * ALIGN);
107  int r = 0;
108  for (int i = 0; funtab[i].name; i++)
109    {
110      err_count = 0;
111      for (int d = 0; d < ALIGN; d++)
112	for (int s = 0; s < ALIGN; s++)
113	  for (int n = 0; n < LEN; n++)
114	    test (funtab + i, d, s, n);
115
116      char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
117      printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
118      if (err_count)
119	r = -1;
120    }
121  return r;
122}
123