1 /*
2 * strcmp 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 int (*fun) (const char *s1, const char *s2);
22 int test_mte;
23 } funtab[] = {
24 // clang-format off
25 F(strcmp, 0)
26 #if __aarch64__
27 F(__strcmp_aarch64, 1)
28 # if __ARM_FEATURE_SVE
29 F(__strcmp_aarch64_sve, 1)
30 # endif
31 #elif __arm__
32 # if __ARM_ARCH >= 7 && __ARM_ARCH_ISA_ARM >= 1
33 F(__strcmp_arm, 0)
34 # elif __ARM_ARCH == 6 && __ARM_ARCH_6M__ >= 1
35 F(__strcmp_armv6m, 0)
36 # endif
37 #endif
38 {0, 0, 0}
39 // clang-format on
40 };
41 #undef F
42
43 #define A 32
44 #define LEN 250000
45 static char *s1buf;
46 static char *s2buf;
47
48 static void *
alignup(void * p)49 alignup (void *p)
50 {
51 return (void *) (((uintptr_t) p + A - 1) & -A);
52 }
53
54 static void
test(const struct fun * fun,int s1align,int s2align,int len,int diffpos,int delta)55 test (const struct fun *fun, int s1align, int s2align, int len, int diffpos,
56 int delta)
57 {
58 char *src1 = alignup (s1buf);
59 char *src2 = alignup (s2buf);
60 char *s1 = src1 + s1align;
61 char *s2 = src2 + s2align;
62 int r;
63
64 if (err_count >= ERR_LIMIT)
65 return;
66 if (len > LEN || s1align >= A || s2align >= A)
67 abort ();
68 if (diffpos >= len)
69 abort ();
70 if ((diffpos < 0) != (delta == 0))
71 abort ();
72
73 for (int i = 0; i < len + A; i++)
74 src1[i] = src2[i] = '?';
75 for (int i = 0; i < len; i++)
76 s1[i] = s2[i] = 'a' + i % 23;
77 if (delta)
78 s1[diffpos] += delta;
79 s1[len] = s2[len] = '\0';
80
81 s1 = tag_buffer (s1, len + 1, fun->test_mte);
82 s2 = tag_buffer (s2, len + 1, fun->test_mte);
83 r = fun->fun (s1, s2);
84 untag_buffer (s1, len + 1, fun->test_mte);
85 untag_buffer (s2, len + 1, fun->test_mte);
86
87 if ((delta == 0 && r != 0) || (delta > 0 && r <= 0) || (delta < 0 && r >= 0))
88 {
89 ERR ("%s(align %d, align %d, %d) failed, returned %d\n", fun->name,
90 s1align, s2align, len, r);
91 quoteat ("src1", src1, len + A, diffpos);
92 quoteat ("src2", src2, len + A, diffpos);
93 }
94 }
95
96 int
main()97 main ()
98 {
99 s1buf = mte_mmap (LEN + 2 * A + 1);
100 s2buf = mte_mmap (LEN + 2 * A + 1);
101 int r = 0;
102 for (int i = 0; funtab[i].name; i++)
103 {
104 err_count = 0;
105 for (int d = 0; d < A; d++)
106 for (int s = 0; s < A; s++)
107 {
108 int n;
109 test (funtab + i, d, s, 0, -1, 0);
110 test (funtab + i, d, s, 1, -1, 0);
111 test (funtab + i, d, s, 1, 0, 1);
112 test (funtab + i, d, s, 1, 0, -1);
113 for (n = 2; n < 100; n++)
114 {
115 test (funtab + i, d, s, n, -1, 0);
116 test (funtab + i, d, s, n, n - 1, -1);
117 test (funtab + i, d, s, n, n / 2, 1);
118 }
119 for (; n < LEN; n *= 2)
120 {
121 test (funtab + i, d, s, n, -1, 0);
122 test (funtab + i, d, s, n, n / 2, -1);
123 }
124 }
125 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
126 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
127 if (err_count)
128 r = -1;
129 }
130 return r;
131 }
132