1/*
2 * memset test.
3 *
4 * Copyright (c) 2019-2023, 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  void *(*fun) (void *s, int c, size_t n);
22  int test_mte;
23} funtab[] = {
24  // clang-format off
25  F(memset, 0)
26#if __aarch64__
27  F(__memset_aarch64, 1)
28# if WANT_MOPS
29  F(__memset_aarch64_mops, 1)
30# endif
31#elif __arm__
32  F(__memset_arm, 0)
33#endif
34  {0, 0, 0}
35  // clang-format on
36};
37#undef F
38
39#define A 32
40#define LEN 250000
41static unsigned char *sbuf;
42
43static void *
44alignup (void *p)
45{
46  return (void *) (((uintptr_t) p + A - 1) & -A);
47}
48
49static void
50test (const struct fun *fun, int salign, int c, int len)
51{
52  unsigned char *src = alignup (sbuf);
53  unsigned char *s = src + salign;
54  void *p;
55  int i;
56
57  if (err_count >= ERR_LIMIT)
58    return;
59  if (len > LEN || salign >= A)
60    abort ();
61  for (i = 0; i < len + A; i++)
62    src[i] = '?';
63  for (i = 0; i < len; i++)
64    s[i] = 'a' + i % 23;
65
66  s = tag_buffer (s, len, fun->test_mte);
67  p = fun->fun (s, c, len);
68  untag_buffer (s, len, fun->test_mte);
69
70  if (p != s)
71    ERR ("%s(%p,..) returned %p\n", fun->name, s, p);
72
73  for (i = 0; i < salign; i++)
74    {
75      if (src[i] != '?')
76	{
77	  ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len);
78	  quoteat ("got", src, len + A, i);
79	  return;
80	}
81    }
82  for (; i < salign + len; i++)
83    {
84      if (src[i] != (unsigned char) c)
85	{
86	  ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len);
87	  quoteat ("got", src, len + A, i);
88	  return;
89	}
90    }
91  for (; i < len + A; i++)
92    {
93      if (src[i] != '?')
94	{
95	  ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len);
96	  quoteat ("got", src, len + A, i);
97	  return;
98	}
99    }
100}
101
102int
103main ()
104{
105  sbuf = mte_mmap (LEN + 2 * A);
106  int r = 0;
107  for (int i = 0; funtab[i].name; i++)
108    {
109      err_count = 0;
110      for (int s = 0; s < A; s++)
111	{
112	  int n;
113	  for (n = 0; n < 100; n++)
114	    {
115	      test (funtab + i, s, 0, n);
116	      test (funtab + i, s, 0x25, n);
117	      test (funtab + i, s, 0xaa25, n);
118	    }
119	  for (; n < LEN; n *= 2)
120	    {
121	      test (funtab + i, s, 0, n);
122	      test (funtab + i, s, 0x25, n);
123	      test (funtab + i, s, 0xaa25, n);
124	    }
125	}
126      char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
127      printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
128      if (err_count)
129	r = -1;
130    }
131  return r;
132}
133