xref: /freebsd/contrib/arm-optimized-routines/string/test/memchr.c (revision 86dc8398c9ca2283c5d6984992b7a585257b5adb)
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 *
46 alignup (void *p)
47 {
48   return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
49 }
50 
51 static void
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
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