1/*
2 * memset test.
3 *
4 * Copyright (c) 2019-2020, Arm Limited.
5 * SPDX-License-Identifier: MIT
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#elif __arm__
29  F(__memset_arm, 0)
30#endif
31  {0, 0, 0}
32  // clang-format on
33};
34#undef F
35
36#define A 32
37#define LEN 250000
38static unsigned char *sbuf;
39
40static void *
41alignup (void *p)
42{
43  return (void *) (((uintptr_t) p + A - 1) & -A);
44}
45
46static void
47test (const struct fun *fun, int salign, int c, int len)
48{
49  unsigned char *src = alignup (sbuf);
50  unsigned char *s = src + salign;
51  void *p;
52  int i;
53
54  if (err_count >= ERR_LIMIT)
55    return;
56  if (len > LEN || salign >= A)
57    abort ();
58  for (i = 0; i < len + A; i++)
59    src[i] = '?';
60  for (i = 0; i < len; i++)
61    s[i] = 'a' + i % 23;
62
63  s = tag_buffer (s, len, fun->test_mte);
64  p = fun->fun (s, c, len);
65  untag_buffer (s, len, fun->test_mte);
66
67  if (p != s)
68    ERR ("%s(%p,..) returned %p\n", fun->name, s, p);
69
70  for (i = 0; i < salign; i++)
71    {
72      if (src[i] != '?')
73	{
74	  ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len);
75	  quoteat ("got", src, len + A, i);
76	  return;
77	}
78    }
79  for (; i < salign + len; i++)
80    {
81      if (src[i] != (unsigned char) c)
82	{
83	  ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len);
84	  quoteat ("got", src, len + A, i);
85	  return;
86	}
87    }
88  for (; i < len + A; i++)
89    {
90      if (src[i] != '?')
91	{
92	  ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len);
93	  quoteat ("got", src, len + A, i);
94	  return;
95	}
96    }
97}
98
99int
100main ()
101{
102  sbuf = mte_mmap (LEN + 2 * A);
103  int r = 0;
104  for (int i = 0; funtab[i].name; i++)
105    {
106      err_count = 0;
107      for (int s = 0; s < A; s++)
108	{
109	  int n;
110	  for (n = 0; n < 100; n++)
111	    {
112	      test (funtab + i, s, 0, n);
113	      test (funtab + i, s, 0x25, n);
114	      test (funtab + i, s, 0xaa25, n);
115	    }
116	  for (; n < LEN; n *= 2)
117	    {
118	      test (funtab + i, s, 0, n);
119	      test (funtab + i, s, 0x25, n);
120	      test (funtab + i, s, 0xaa25, n);
121	    }
122	}
123      char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
124      printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
125      if (err_count)
126	r = -1;
127    }
128  return r;
129}
130