1 /*
2 * strchr 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 char *(*fun) (const char *s, int c);
23 int test_mte;
24 } funtab[] = {
25 // clang-format off
26 F(strchr, 0)
27 #if __aarch64__
28 F(__strchr_aarch64, 0)
29 F(__strchr_aarch64_mte, 1)
30 # if __ARM_FEATURE_SVE
31 F(__strchr_aarch64_sve, 1)
32 # endif
33 #endif
34 {0, 0, 0}
35 // clang-format on
36 };
37 #undef F
38
39 #define ALIGN 32
40 #define LEN 512
41 static char *sbuf;
42
43 static void *
alignup(void * p)44 alignup (void *p)
45 {
46 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
47 }
48
49 static void
test(const struct fun * fun,int align,int seekpos,int len)50 test (const struct fun *fun, int align, int seekpos, int len)
51 {
52 char *src = alignup (sbuf);
53 char *s = src + align;
54 char *f = seekpos != -1 ? s + seekpos : 0;
55 int seekchar = 0x1;
56 void *p;
57
58 if (err_count >= ERR_LIMIT)
59 return;
60 if (len > LEN || seekpos >= len || align >= ALIGN)
61 abort ();
62
63 for (int i = 0; src + i < s; i++)
64 src[i] = (i + len) & 1 ? seekchar : 0;
65 for (int i = 1; i <= ALIGN; i++)
66 s[len + i] = (i + len) & 1 ? seekchar : 0;
67 for (int i = 0; i < len; i++)
68 s[i] = 'a' + (i & 31);
69 if (seekpos != -1)
70 s[seekpos] = seekchar;
71 if (seekpos != -1 && (len + align) & 1)
72 s[seekpos + 1] = seekchar;
73 s[len] = '\0';
74
75 s = tag_buffer (s, len + 1, fun->test_mte);
76 p = fun->fun (s, seekchar);
77 untag_buffer (s, len + 1, fun->test_mte);
78 p = untag_pointer (p);
79
80 if (p != f)
81 {
82 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
83 fun->name, s, seekchar, len, p, f, seekpos);
84 quote ("input", s, len);
85 }
86
87 s = tag_buffer (s, len + 1, fun->test_mte);
88 p = fun->fun (s, 0);
89 untag_buffer (s, len + 1, fun->test_mte);
90
91 if (p != s + len)
92 {
93 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
94 fun->name, s, 0, len, p, f, len);
95 quote ("input", s, len);
96 }
97 }
98
99 int
main(void)100 main (void)
101 {
102 sbuf = mte_mmap (LEN + 3 * ALIGN);
103 int r = 0;
104 for (int i = 0; funtab[i].name; i++)
105 {
106 err_count = 0;
107 for (int a = 0; a < ALIGN; a++)
108 for (int n = 0; n < LEN; n++)
109 {
110 for (int sp = 0; sp < n; sp++)
111 test (funtab + i, a, sp, n);
112 test (funtab + i, a, -1, n);
113 }
114
115 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
116 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
117 if (err_count)
118 r = -1;
119 }
120 return r;
121 }
122