1*412f47f9SXin Li /*
2*412f47f9SXin Li * memchr test.
3*412f47f9SXin Li *
4*412f47f9SXin Li * Copyright (c) 2020, Arm Limited.
5*412f47f9SXin Li * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6*412f47f9SXin Li */
7*412f47f9SXin Li
8*412f47f9SXin Li #ifndef _GNU_SOURCE
9*412f47f9SXin Li #define _GNU_SOURCE
10*412f47f9SXin Li #endif
11*412f47f9SXin Li
12*412f47f9SXin Li #include <stdint.h>
13*412f47f9SXin Li #include <stdio.h>
14*412f47f9SXin Li #include <stdlib.h>
15*412f47f9SXin Li #include <string.h>
16*412f47f9SXin Li #include <limits.h>
17*412f47f9SXin Li #include "mte.h"
18*412f47f9SXin Li #include "stringlib.h"
19*412f47f9SXin Li #include "stringtest.h"
20*412f47f9SXin Li
21*412f47f9SXin Li #define F(x, mte) {#x, x, mte},
22*412f47f9SXin Li
23*412f47f9SXin Li static const struct fun
24*412f47f9SXin Li {
25*412f47f9SXin Li const char *name;
26*412f47f9SXin Li void *(*fun) (const void *s, int c, size_t n);
27*412f47f9SXin Li int test_mte;
28*412f47f9SXin Li } funtab[] = {
29*412f47f9SXin Li // clang-format off
30*412f47f9SXin Li F(memrchr, 0)
31*412f47f9SXin Li #if __aarch64__
32*412f47f9SXin Li F(__memrchr_aarch64, 1)
33*412f47f9SXin Li #endif
34*412f47f9SXin Li {0, 0, 0}
35*412f47f9SXin Li // clang-format on
36*412f47f9SXin Li };
37*412f47f9SXin Li #undef F
38*412f47f9SXin Li
39*412f47f9SXin Li #define ALIGN 32
40*412f47f9SXin Li #define LEN 512
41*412f47f9SXin Li static char *sbuf;
42*412f47f9SXin Li
43*412f47f9SXin Li static void *
alignup(void * p)44*412f47f9SXin Li alignup (void *p)
45*412f47f9SXin Li {
46*412f47f9SXin Li return (void *) (((uintptr_t) p + ALIGN) & -ALIGN);
47*412f47f9SXin Li }
48*412f47f9SXin Li
49*412f47f9SXin Li static void
test(const struct fun * fun,int align,size_t seekpos,size_t len,size_t maxlen)50*412f47f9SXin Li test (const struct fun *fun, int align, size_t seekpos, size_t len,
51*412f47f9SXin Li size_t maxlen)
52*412f47f9SXin Li {
53*412f47f9SXin Li char *src = alignup (sbuf);
54*412f47f9SXin Li char *s = src + align;
55*412f47f9SXin Li char *f = seekpos < maxlen ? s + seekpos : NULL;
56*412f47f9SXin Li int seekchar = 1;
57*412f47f9SXin Li void *p;
58*412f47f9SXin Li
59*412f47f9SXin Li if (err_count >= ERR_LIMIT)
60*412f47f9SXin Li return;
61*412f47f9SXin Li if (len > LEN || seekpos > LEN || align > ALIGN)
62*412f47f9SXin Li abort ();
63*412f47f9SXin Li
64*412f47f9SXin Li for (int i = 0; src + i < s; i++)
65*412f47f9SXin Li src[i] = seekchar;
66*412f47f9SXin Li for (int i = 0; i <= ALIGN; i++)
67*412f47f9SXin Li s[len + i] = seekchar;
68*412f47f9SXin Li for (int i = 0; i < len; i++)
69*412f47f9SXin Li s[i] = 'a' + (i & 31);
70*412f47f9SXin Li s[seekpos] = seekchar;
71*412f47f9SXin Li s[((len ^ align) & 1) && seekpos < maxlen ? seekpos - 1 : len] = seekchar;
72*412f47f9SXin Li
73*412f47f9SXin Li s = tag_buffer (s, maxlen, fun->test_mte);
74*412f47f9SXin Li p = fun->fun (s, seekchar, maxlen);
75*412f47f9SXin Li untag_buffer (s, maxlen, fun->test_mte);
76*412f47f9SXin Li p = untag_pointer (p);
77*412f47f9SXin Li
78*412f47f9SXin Li if (p != f)
79*412f47f9SXin Li {
80*412f47f9SXin Li ERR ("%s (%p, 0x%02x, %zu) returned %p, expected %p\n", fun->name, s,
81*412f47f9SXin Li seekchar, maxlen, p, f);
82*412f47f9SXin Li quote ("input", s, len);
83*412f47f9SXin Li }
84*412f47f9SXin Li }
85*412f47f9SXin Li
86*412f47f9SXin Li int
main(void)87*412f47f9SXin Li main (void)
88*412f47f9SXin Li {
89*412f47f9SXin Li sbuf = mte_mmap (LEN + 3 * ALIGN);
90*412f47f9SXin Li int r = 0;
91*412f47f9SXin Li for (int i = 0; funtab[i].name; i++)
92*412f47f9SXin Li {
93*412f47f9SXin Li err_count = 0;
94*412f47f9SXin Li for (int a = 0; a < ALIGN; a++)
95*412f47f9SXin Li for (int n = 0; n < LEN; n++)
96*412f47f9SXin Li {
97*412f47f9SXin Li for (int sp = 0; sp < LEN; sp++)
98*412f47f9SXin Li test (funtab + i, a, sp, n, n);
99*412f47f9SXin Li }
100*412f47f9SXin Li char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
101*412f47f9SXin Li printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
102*412f47f9SXin Li if (err_count)
103*412f47f9SXin Li r = -1;
104*412f47f9SXin Li }
105*412f47f9SXin Li return r;
106*412f47f9SXin Li }
107