1 /*
2 * memcpy 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
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 *
alignup(void * p)49 alignup (void *p)
50 {
51 return (void *) (((uintptr_t) p + A - 1) & -A);
52 }
53
54 static void
test(const struct fun * fun,int dalign,int salign,int len)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
main()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