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 #elif __arm__
32 F(__memcpy_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
41 static unsigned char *dbuf;
42 static unsigned char *sbuf;
43 static unsigned char wbuf[LEN + 2 * A];
44
45 static void *
alignup(void * p)46 alignup (void *p)
47 {
48 return (void *) (((uintptr_t) p + A - 1) & -A);
49 }
50
51 static void
test(const struct fun * fun,int dalign,int salign,int len)52 test (const struct fun *fun, int dalign, int salign, int len)
53 {
54 unsigned char *src = alignup (sbuf);
55 unsigned char *dst = alignup (dbuf);
56 unsigned char *want = wbuf;
57 unsigned char *s = src + salign;
58 unsigned char *d = dst + dalign;
59 unsigned char *w = want + dalign;
60 void *p;
61 int i;
62
63 if (err_count >= ERR_LIMIT)
64 return;
65 if (len > LEN || dalign >= A || salign >= A)
66 abort ();
67 for (i = 0; i < len + A; i++)
68 {
69 src[i] = '?';
70 want[i] = dst[i] = '*';
71 }
72 for (i = 0; i < len; i++)
73 s[i] = w[i] = 'a' + i % 23;
74
75 s = tag_buffer (s, len, fun->test_mte);
76 d = tag_buffer (d, len, fun->test_mte);
77 p = fun->fun (d, s, len);
78 untag_buffer (s, len, fun->test_mte);
79 untag_buffer (d, len, fun->test_mte);
80
81 if (p != d)
82 ERR ("%s(%p,..) returned %p\n", fun->name, d, p);
83 for (i = 0; i < len + A; i++)
84 {
85 if (dst[i] != want[i])
86 {
87 ERR ("%s(align %d, align %d, %d) failed\n", fun->name, dalign, salign,
88 len);
89 quoteat ("got", dst, len + A, i);
90 quoteat ("want", want, len + A, i);
91 break;
92 }
93 }
94 }
95
96 int
main()97 main ()
98 {
99 dbuf = mte_mmap (LEN + 2 * A);
100 sbuf = mte_mmap (LEN + 2 * A);
101 int r = 0;
102 for (int i = 0; funtab[i].name; i++)
103 {
104 err_count = 0;
105 for (int d = 0; d < A; d++)
106 for (int s = 0; s < A; s++)
107 {
108 int n;
109 for (n = 0; n < 100; n++)
110 test (funtab + i, d, s, n);
111 for (; n < LEN; n *= 2)
112 test (funtab + i, d, s, n);
113 }
114 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
115 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
116 if (err_count)
117 r = -1;
118 }
119 return r;
120 }
121