1 /*
2 * memchr 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 <limits.h>
13 #include "mte.h"
14 #include "stringlib.h"
15 #include "stringtest.h"
16
17 #define F(x, mte) {#x, x, mte},
18
19 static const struct fun
20 {
21 const char *name;
22 void *(*fun) (const void *s, int c, size_t n);
23 int test_mte;
24 } funtab[] = {
25 // clang-format off
26 F(memchr, 0)
27 #if __aarch64__
28 F(__memchr_aarch64, 0)
29 F(__memchr_aarch64_mte, 1)
30 # if __ARM_FEATURE_SVE
31 F(__memchr_aarch64_sve, 1)
32 # endif
33 #elif __arm__
34 F(__memchr_arm, 0)
35 #endif
36 {0, 0, 0}
37 // clang-format on
38 };
39 #undef F
40
41 #define ALIGN 32
42 #define LEN 512
43 static char *sbuf;
44
45 static void *
alignup(void * p)46 alignup (void *p)
47 {
48 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
49 }
50
51 static void
test(const struct fun * fun,int align,size_t seekpos,size_t len,size_t maxlen)52 test (const struct fun *fun, int align, size_t seekpos, size_t len,
53 size_t maxlen)
54 {
55 char *src = alignup (sbuf);
56 char *s = src + align;
57 char *f = seekpos < maxlen ? s + seekpos : NULL;
58 int seekchar = 1;
59 void *p;
60
61 if (err_count >= ERR_LIMIT)
62 return;
63 if (len > LEN || seekpos > LEN || align > ALIGN)
64 abort ();
65
66 for (int i = 0; src + i < s; i++)
67 src[i] = seekchar;
68 for (int i = 0; i <= ALIGN; i++)
69 s[len + i] = seekchar;
70 for (int i = 0; i < len; i++)
71 s[i] = 'a' + (i & 31);
72 s[seekpos] = seekchar;
73 s[((len ^ align) & 1) ? seekpos + 1 : len] = seekchar;
74
75 int mte_len = seekpos != -1 ? seekpos + 1 : maxlen;
76 s = tag_buffer (s, mte_len, fun->test_mte);
77 p = fun->fun (s, seekchar, maxlen);
78 untag_buffer (s, mte_len, fun->test_mte);
79 p = untag_pointer (p);
80
81 if (p != f)
82 {
83 ERR ("%s (%p, 0x%02x, %zu) returned %p, expected %p\n", fun->name, s,
84 seekchar, maxlen, p, f);
85 quote ("input", s, len);
86 }
87 }
88
89 int
main(void)90 main (void)
91 {
92 sbuf = mte_mmap (LEN + 3 * ALIGN);
93 int r = 0;
94 for (int i = 0; funtab[i].name; i++)
95 {
96 err_count = 0;
97 for (int a = 0; a < ALIGN; a++)
98 for (int n = 0; n < LEN; n++)
99 {
100 for (int sp = 0; sp < LEN; sp++)
101 test (funtab + i, a, sp, n, n);
102 test (funtab + i, a, n, n, SIZE_MAX - a);
103 }
104 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
105 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
106 if (err_count)
107 r = -1;
108 }
109 return r;
110 }
111