1 /*
2 * memcpy 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
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 # if WANT_MOPS
35 F(__memcpy_aarch64_mops, 1)
36 # endif
37 #elif __arm__
38 F(__memcpy_arm, 0)
39 #endif
40 {0, 0, 0}
41 // clang-format on
42 };
43 #undef F
44
45 #define A 32
46 #define LEN 250000
47 static unsigned char *dbuf;
48 static unsigned char *sbuf;
49 static unsigned char wbuf[LEN + 2 * A];
50
51 static void *
alignup(void * p)52 alignup (void *p)
53 {
54 return (void *) (((uintptr_t) p + A - 1) & -A);
55 }
56
57 static void
test(const struct fun * fun,int dalign,int salign,int len)58 test (const struct fun *fun, int dalign, int salign, int len)
59 {
60 unsigned char *src = alignup (sbuf);
61 unsigned char *dst = alignup (dbuf);
62 unsigned char *want = wbuf;
63 unsigned char *s = src + salign;
64 unsigned char *d = dst + dalign;
65 unsigned char *w = want + dalign;
66 void *p;
67 int i;
68
69 if (err_count >= ERR_LIMIT)
70 return;
71 if (len > LEN || dalign >= A || salign >= A)
72 abort ();
73 for (i = 0; i < len + A; i++)
74 {
75 src[i] = '?';
76 want[i] = dst[i] = '*';
77 }
78 for (i = 0; i < len; i++)
79 s[i] = w[i] = 'a' + i % 23;
80
81 s = tag_buffer (s, len, fun->test_mte);
82 d = tag_buffer (d, len, fun->test_mte);
83 p = fun->fun (d, s, len);
84 untag_buffer (s, len, fun->test_mte);
85 untag_buffer (d, len, fun->test_mte);
86
87 if (p != d)
88 ERR ("%s(%p,..) returned %p\n", fun->name, d, p);
89 for (i = 0; i < len + A; i++)
90 {
91 if (dst[i] != want[i])
92 {
93 ERR ("%s(align %d, align %d, %d) failed\n", fun->name, dalign, salign,
94 len);
95 quoteat ("got", dst, len + A, i);
96 quoteat ("want", want, len + A, i);
97 break;
98 }
99 }
100 }
101
102 int
main()103 main ()
104 {
105 dbuf = mte_mmap (LEN + 2 * A);
106 sbuf = mte_mmap (LEN + 2 * A);
107 int r = 0;
108 for (int i = 0; funtab[i].name; i++)
109 {
110 err_count = 0;
111 for (int d = 0; d < A; d++)
112 for (int s = 0; s < A; s++)
113 {
114 int n;
115 for (n = 0; n < 100; n++)
116 test (funtab + i, d, s, n);
117 for (; n < LEN; n *= 2)
118 test (funtab + i, d, s, n);
119 }
120 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
121 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
122 if (err_count)
123 r = -1;
124 }
125 return r;
126 }
127