1 /*
2 * strlen 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 <sys/mman.h>
13 #include <limits.h>
14 #include "mte.h"
15 #include "stringlib.h"
16 #include "stringtest.h"
17
18 #define F(x, mte) {#x, x, mte},
19
20 static const struct fun
21 {
22 const char *name;
23 size_t (*fun) (const char *s);
24 int test_mte;
25 } funtab[] = {
26 // clang-format off
27 F(strlen, 0)
28 #if __aarch64__
29 F(__strlen_aarch64, 0)
30 F(__strlen_aarch64_mte, 1)
31 # if __ARM_FEATURE_SVE
32 F(__strlen_aarch64_sve, 1)
33 # endif
34 #elif __arm__
35 # if __ARM_ARCH >= 6 && __ARM_ARCH_ISA_THUMB == 2
36 F(__strlen_armv6t2, 0)
37 # endif
38 #endif
39 {0, 0, 0}
40 // clang-format on
41 };
42 #undef F
43
44 #define ALIGN 32
45 #define LEN 512
46 static char *sbuf;
47
48 static void *
alignup(void * p)49 alignup (void *p)
50 {
51 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
52 }
53
54 static void
test(const struct fun * fun,int align,int len)55 test (const struct fun *fun, int align, int len)
56 {
57 char *src = alignup (sbuf);
58 char *s = src + align;
59 size_t r;
60
61 if (err_count >= ERR_LIMIT)
62 return;
63 if (len > LEN || align >= ALIGN)
64 abort ();
65
66 for (int i = 0; src + i < s; i++)
67 src[i] = 0;
68 for (int i = 1; i <= ALIGN; i++)
69 s[len + i] = (len + align) & 1 ? 1 : 0;
70 for (int i = 0; i < len; i++)
71 s[i] = 'a' + (i & 31);
72 s[len] = '\0';
73
74 s = tag_buffer (s, len + 1, fun->test_mte);
75 r = fun->fun (s);
76 untag_buffer (s, len + 1, fun->test_mte);
77
78 if (r != len)
79 {
80 ERR ("%s (%p) returned %zu expected %d\n", fun->name, s, r, len);
81 quote ("input", src, len);
82 }
83 }
84
85 int
main(void)86 main (void)
87 {
88 sbuf = mte_mmap (LEN + 3 * ALIGN);
89 int r = 0;
90 for (int i = 0; funtab[i].name; i++)
91 {
92 err_count = 0;
93 for (int a = 0; a < ALIGN; a++)
94 for (int n = 0; n < LEN; n++)
95 test (funtab + i, a, n);
96
97 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
98 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
99 if (err_count)
100 r = -1;
101 }
102 return r;
103 }
104