1 /*
2 * strcpy test.
3 *
4 * Copyright (c) 2019-2022, Arm Limited.
5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
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, 1)
28 # if __ARM_FEATURE_SVE
29 F(__strcpy_aarch64_sve, 1)
30 # endif
31 #elif __arm__ && defined (__thumb2__) && !defined (__thumb__)
32 F(__strcpy_arm, 0)
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 *dbuf;
42 static char *sbuf;
43 static char wbuf[LEN + 3 * ALIGN];
44
45 static void *
alignup(void * p)46 alignup (void *p)
47 {
48 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN);
49 }
50
51 static void
test(const struct fun * fun,int dalign,int salign,int len)52 test (const struct fun *fun, int dalign, int salign, int len)
53 {
54 char *src = alignup (sbuf);
55 char *dst = alignup (dbuf);
56 char *want = wbuf;
57 char *s = src + salign;
58 char *d = dst + dalign;
59 char *w = want + dalign;
60 void *p;
61 int i;
62
63 if (err_count >= ERR_LIMIT)
64 return;
65 if (len > LEN || dalign >= ALIGN || salign >= ALIGN)
66 abort ();
67 for (i = 0; i < len + ALIGN; i++)
68 {
69 src[i] = '?';
70 want[i] = dst[i] = '*';
71 }
72 for (int i = 0; src + i < s; i++)
73 src[i] = 0;
74 for (int i = 1; i <= ALIGN; i++)
75 s[len + i] = (len + salign) & 1 ? 1 : 0;
76 for (i = 0; i < len; i++)
77 s[i] = w[i] = 'a' + (i & 31);
78 s[len] = w[len] = '\0';
79
80 s = tag_buffer (s, len + 1, fun->test_mte);
81 d = tag_buffer (d, len + 1, fun->test_mte);
82 p = fun->fun (d, s);
83 untag_buffer (s, len + 1, fun->test_mte);
84 untag_buffer (d, len + 1, fun->test_mte);
85
86 if (p != d)
87 ERR ("%s (%p,..) returned %p\n", fun->name, d, p);
88
89 for (i = 0; i < len + ALIGN; i++)
90 {
91 if (dst[i] != want[i])
92 {
93 ERR ("%s (align %d, align %d, %d) failed\n",
94 fun->name, dalign, salign, len);
95 quoteat ("got", dst, len + ALIGN, i);
96 quoteat ("want", want, len + ALIGN, i);
97 break;
98 }
99 }
100 }
101
102 int
main(void)103 main (void)
104 {
105 sbuf = mte_mmap (LEN + 3 * ALIGN);
106 dbuf = mte_mmap (LEN + 3 * ALIGN);
107 int r = 0;
108 for (int i = 0; funtab[i].name; i++)
109 {
110 err_count = 0;
111 for (int d = 0; d < ALIGN; d++)
112 for (int s = 0; s < ALIGN; s++)
113 for (int n = 0; n < LEN; n++)
114 test (funtab + i, d, s, n);
115
116 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
117 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
118 if (err_count)
119 r = -1;
120 }
121 return r;
122 }
123