1 /*
2 * strcpy 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 "mte.h"
13 #include "stringlib.h"
14 #include "stringtest.h"
15
16 #define F(x, mte) {#x, x, mte},
17
18 static const struct fun
19 {
20 const char *name;
21 char *(*fun) (char *dest, const char *src);
22 int test_mte;
23 } funtab[] = {
24 // clang-format off
25 F(strcpy, 0)
26 #if __aarch64__
27 F(__strcpy_aarch64, 0)
28 F(__strcpy_aarch64_mte, 1)
29 # if __ARM_FEATURE_SVE
30 F(__strcpy_aarch64_sve, 1)
31 # endif
32 #elif __arm__ && defined (__thumb2__) && !defined (__thumb__)
33 F(__strcpy_arm, 0)
34 #endif
35 {0, 0, 0}
36 // clang-format on
37 };
38 #undef F
39
40 #define ALIGN 32
41 #define LEN 512
42 static char *dbuf;
43 static char *sbuf;
44 static char wbuf[LEN + 3 * ALIGN];
45
46 static void *
alignup(void * p)47 alignup (void *p)
48 {
49 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
50 }
51
52 static void
test(const struct fun * fun,int dalign,int salign,int len)53 test (const struct fun *fun, int dalign, int salign, int len)
54 {
55 char *src = alignup (sbuf);
56 char *dst = alignup (dbuf);
57 char *want = wbuf;
58 char *s = src + salign;
59 char *d = dst + dalign;
60 char *w = want + dalign;
61 void *p;
62 int i;
63
64 if (err_count >= ERR_LIMIT)
65 return;
66 if (len > LEN || dalign >= ALIGN || salign >= ALIGN)
67 abort ();
68 for (i = 0; i < len + ALIGN; i++)
69 {
70 src[i] = '?';
71 want[i] = dst[i] = '*';
72 }
73 for (int i = 0; src + i < s; i++)
74 src[i] = 0;
75 for (int i = 1; i <= ALIGN; i++)
76 s[len + i] = (len + salign) & 1 ? 1 : 0;
77 for (i = 0; i < len; i++)
78 s[i] = w[i] = 'a' + (i & 31);
79 s[len] = w[len] = '\0';
80
81 s = tag_buffer (s, len + 1, fun->test_mte);
82 d = tag_buffer (d, len + 1, fun->test_mte);
83 p = fun->fun (d, s);
84 untag_buffer (s, len + 1, fun->test_mte);
85 untag_buffer (d, len + 1, fun->test_mte);
86
87 if (p != d)
88 ERR ("%s (%p,..) returned %p\n", fun->name, d, p);
89
90 for (i = 0; i < len + ALIGN; i++)
91 {
92 if (dst[i] != want[i])
93 {
94 ERR ("%s (align %d, align %d, %d) failed\n",
95 fun->name, dalign, salign, len);
96 quoteat ("got", dst, len + ALIGN, i);
97 quoteat ("want", want, len + ALIGN, i);
98 break;
99 }
100 }
101 }
102
103 int
main(void)104 main (void)
105 {
106 sbuf = mte_mmap (LEN + 3 * ALIGN);
107 dbuf = 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 d = 0; d < ALIGN; d++)
113 for (int s = 0; s < ALIGN; s++)
114 for (int n = 0; n < LEN; n++)
115 test (funtab + i, d, s, n);
116
117 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
118 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
119 if (err_count)
120 r = -1;
121 }
122 return r;
123 }
124