1 /*
2 * strcmp 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 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, 0)
28 F(__strcmp_aarch64_mte, 1)
29 # if __ARM_FEATURE_SVE
30 F(__strcmp_aarch64_sve, 1)
31 # endif
32 #elif __arm__
33 # if __ARM_ARCH >= 7 && __ARM_ARCH_ISA_ARM >= 1
34 F(__strcmp_arm, 0)
35 # elif __ARM_ARCH == 6 && __ARM_ARCH_6M__ >= 1
36 F(__strcmp_armv6m, 0)
37 # endif
38 #endif
39 {0, 0, 0}
40 // clang-format on
41 };
42 #undef F
43
44 #define A 32
45 #define LEN 250000
46 static char *s1buf;
47 static char *s2buf;
48
49 static void *
alignup(void * p)50 alignup (void *p)
51 {
52 return (void *) (((uintptr_t) p + A - 1) & -A);
53 }
54
55 static void
test(const struct fun * fun,int s1align,int s2align,int len,int diffpos,int delta)56 test (const struct fun *fun, int s1align, int s2align, int len, int diffpos,
57 int delta)
58 {
59 char *src1 = alignup (s1buf);
60 char *src2 = alignup (s2buf);
61 char *s1 = src1 + s1align;
62 char *s2 = src2 + s2align;
63 int r;
64
65 if (err_count >= ERR_LIMIT)
66 return;
67 if (len > LEN || s1align >= A || s2align >= A)
68 abort ();
69 if (diffpos >= len)
70 abort ();
71 if ((diffpos < 0) != (delta == 0))
72 abort ();
73
74 for (int i = 0; i < len + A; i++)
75 src1[i] = src2[i] = '?';
76 for (int i = 0; i < len; i++)
77 s1[i] = s2[i] = 'a' + i % 23;
78 if (delta)
79 s1[diffpos] += delta;
80 s1[len] = s2[len] = '\0';
81
82 s1 = tag_buffer (s1, len + 1, fun->test_mte);
83 s2 = tag_buffer (s2, len + 1, fun->test_mte);
84 r = fun->fun (s1, s2);
85 untag_buffer (s1, len + 1, fun->test_mte);
86 untag_buffer (s2, len + 1, fun->test_mte);
87
88 if ((delta == 0 && r != 0) || (delta > 0 && r <= 0) || (delta < 0 && r >= 0))
89 {
90 ERR ("%s(align %d, align %d, %d) failed, returned %d\n", fun->name,
91 s1align, s2align, len, r);
92 quoteat ("src1", src1, len + A, diffpos);
93 quoteat ("src2", src2, len + A, diffpos);
94 }
95 }
96
97 int
main()98 main ()
99 {
100 s1buf = mte_mmap (LEN + 2 * A + 1);
101 s2buf = mte_mmap (LEN + 2 * A + 1);
102 int r = 0;
103 for (int i = 0; funtab[i].name; i++)
104 {
105 err_count = 0;
106 for (int d = 0; d < A; d++)
107 for (int s = 0; s < A; s++)
108 {
109 int n;
110 test (funtab + i, d, s, 0, -1, 0);
111 test (funtab + i, d, s, 1, -1, 0);
112 test (funtab + i, d, s, 1, 0, 1);
113 test (funtab + i, d, s, 1, 0, -1);
114 for (n = 2; n < 100; n++)
115 {
116 test (funtab + i, d, s, n, -1, 0);
117 test (funtab + i, d, s, n, n - 1, -1);
118 test (funtab + i, d, s, n, n / 2, 1);
119 }
120 for (; n < LEN; n *= 2)
121 {
122 test (funtab + i, d, s, n, -1, 0);
123 test (funtab + i, d, s, n, n / 2, -1);
124 }
125 }
126 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
127 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
128 if (err_count)
129 r = -1;
130 }
131 return r;
132 }
133