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
18 static 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
38 static unsigned char *sbuf;
39
40 static void *
alignup(void * p)41 alignup (void *p)
42 {
43 return (void *) (((uintptr_t) p + A - 1) & -A);
44 }
45
46 static void
test(const struct fun * fun,int salign,int c,int len)47 test (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
99 int
main()100 main ()
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