1 /*
2  * memcpy 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 
18 static const struct fun
19 {
20   const char *name;
21   void *(*fun) (void *, const void *, size_t);
22   int test_mte;
23 } funtab[] = {
24   // clang-format off
25   F(memcpy, 0)
26 #if __aarch64__
27   F(__memcpy_aarch64, 1)
28 # if __ARM_NEON
29   F(__memcpy_aarch64_simd, 1)
30 # endif
31 # if __ARM_FEATURE_SVE
32   F(__memcpy_aarch64_sve, 1)
33 # endif
34 #elif __arm__
35   F(__memcpy_arm, 0)
36 #endif
37   {0, 0, 0}
38   // clang-format on
39 };
40 #undef F
41 
42 #define A 32
43 #define LEN 250000
44 static unsigned char *dbuf;
45 static unsigned char *sbuf;
46 static unsigned char wbuf[LEN + 2 * A];
47 
48 static void *
49 alignup (void *p)
50 {
51   return (void *) (((uintptr_t) p + A - 1) & -A);
52 }
53 
54 static void
55 test (const struct fun *fun, int dalign, int salign, int len)
56 {
57   unsigned char *src = alignup (sbuf);
58   unsigned char *dst = alignup (dbuf);
59   unsigned char *want = wbuf;
60   unsigned char *s = src + salign;
61   unsigned char *d = dst + dalign;
62   unsigned char *w = want + dalign;
63   void *p;
64   int i;
65 
66   if (err_count >= ERR_LIMIT)
67     return;
68   if (len > LEN || dalign >= A || salign >= A)
69     abort ();
70   for (i = 0; i < len + A; i++)
71     {
72       src[i] = '?';
73       want[i] = dst[i] = '*';
74     }
75   for (i = 0; i < len; i++)
76     s[i] = w[i] = 'a' + i % 23;
77 
78   s = tag_buffer (s, len, fun->test_mte);
79   d = tag_buffer (d, len, fun->test_mte);
80   p = fun->fun (d, s, len);
81   untag_buffer (s, len, fun->test_mte);
82   untag_buffer (d, len, fun->test_mte);
83 
84   if (p != d)
85     ERR ("%s(%p,..) returned %p\n", fun->name, d, p);
86   for (i = 0; i < len + A; i++)
87     {
88       if (dst[i] != want[i])
89 	{
90 	  ERR ("%s(align %d, align %d, %d) failed\n", fun->name, dalign, salign,
91 	       len);
92 	  quoteat ("got", dst, len + A, i);
93 	  quoteat ("want", want, len + A, i);
94 	  break;
95 	}
96     }
97 }
98 
99 int
100 main ()
101 {
102   dbuf = mte_mmap (LEN + 2 * A);
103   sbuf = mte_mmap (LEN + 2 * A);
104   int r = 0;
105   for (int i = 0; funtab[i].name; i++)
106     {
107       err_count = 0;
108       for (int d = 0; d < A; d++)
109 	for (int s = 0; s < A; s++)
110 	  {
111 	    int n;
112 	    for (n = 0; n < 100; n++)
113 	      test (funtab + i, d, s, n);
114 	    for (; n < LEN; n *= 2)
115 	      test (funtab + i, d, s, n);
116 	  }
117       char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
118       printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
119       if (err_count)
120 	r = -1;
121     }
122   return r;
123 }
124