1 /*
2 * strchrnul test.
3 *
4 * Copyright (c) 2019-2020, Arm Limited.
5 * SPDX-License-Identifier: MIT
6 */
7
8 #ifndef _GNU_SOURCE
9 #define _GNU_SOURCE
10 #endif
11
12 #include <stdint.h>
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <limits.h>
17 #include "mte.h"
18 #include "stringlib.h"
19 #include "stringtest.h"
20
21 #define F(x, mte) {#x, x, mte},
22
23 static const struct fun
24 {
25 const char *name;
26 char *(*fun) (const char *s, int c);
27 int test_mte;
28 } funtab[] = {
29 // clang-format off
30 F(strchrnul, 0)
31 #if __aarch64__
32 F(__strchrnul_aarch64, 0)
33 F(__strchrnul_aarch64_mte, 1)
34 # if __ARM_FEATURE_SVE
35 F(__strchrnul_aarch64_sve, 1)
36 # endif
37 #endif
38 {0, 0, 0}
39 // clang-format on
40 };
41 #undef F
42
43 #define ALIGN 32
44 #define LEN 512
45 static char *sbuf;
46
47 static void *
alignup(void * p)48 alignup (void *p)
49 {
50 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
51 }
52
53 static void
test(const struct fun * fun,int align,int seekpos,int len)54 test (const struct fun *fun, int align, int seekpos, int len)
55 {
56 char *src = alignup (sbuf);
57 char *s = src + align;
58 char *f = seekpos != -1 ? s + seekpos : s + len;
59 int seekchar = 0x1;
60 void *p;
61
62 if (err_count >= ERR_LIMIT)
63 return;
64 if (len > LEN || seekpos >= len || align >= ALIGN)
65 abort ();
66
67 for (int i = 0; src + i < s; i++)
68 src[i] = (i + len) & 1 ? seekchar : 0;
69 for (int i = 1; i <= ALIGN; i++)
70 s[len + i] = (i + len) & 1 ? seekchar : 0;
71 for (int i = 0; i < len; i++)
72 s[i] = 'a' + (i & 31);
73 if (seekpos != -1)
74 s[seekpos] = seekchar;
75 if (seekpos != -1 && (len + align) & 1)
76 s[seekpos + 1] = seekchar;
77 s[len] = '\0';
78
79 int mte_len = seekpos != -1 ? seekpos + 1 : len + 1;
80 s = tag_buffer (s, mte_len, fun->test_mte);
81 p = fun->fun (s, seekchar);
82 untag_buffer (s, mte_len, fun->test_mte);
83 p = untag_pointer (p);
84
85 if (p != f)
86 {
87 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
88 fun->name, s, seekchar, len, p, f, seekpos);
89 quote ("input", s, len);
90 }
91
92 s = tag_buffer (s, len + 1, fun->test_mte);
93 p = fun->fun (s, 0);
94 untag_buffer (s, len + 1, fun->test_mte);
95
96 if (p != s + len)
97 {
98 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n",
99 fun->name, s, 0, len, p, f, len);
100 quote ("input", s, len);
101 }
102 }
103
104 int
main(void)105 main (void)
106 {
107 sbuf = mte_mmap (LEN + 3 * ALIGN);
108 int r = 0;
109 for (int i = 0; funtab[i].name; i++)
110 {
111 err_count = 0;
112 for (int a = 0; a < ALIGN; a++)
113 for (int n = 0; n < LEN; n++)
114 {
115 for (int sp = 0; sp < n; sp++)
116 test (funtab + i, a, sp, n);
117 test (funtab + i, a, -1, n);
118 }
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