1 /* 2 * strncmp 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 *, const char *, size_t); 22 int test_mte; 23 } funtab[] = { 24 // clang-format off 25 F(strncmp, 0) 26 #if __aarch64__ 27 F(__strncmp_aarch64, 1) 28 # if __ARM_FEATURE_SVE 29 F(__strncmp_aarch64_sve, 1) 30 # endif 31 #endif 32 {0, 0, 0} 33 // clang-format on 34 }; 35 #undef F 36 37 #define A 32 38 #define LEN 250000 39 static char *s1buf; 40 static char *s2buf; 41 42 static void * 43 alignup (void *p) 44 { 45 return (void *) (((uintptr_t) p + A - 1) & -A); 46 } 47 48 static void 49 test (const struct fun *fun, int s1align, int s2align, int maxlen, int diffpos, 50 int len, int delta) 51 { 52 char *src1 = alignup (s1buf); 53 char *src2 = alignup (s2buf); 54 char *s1 = src1 + s1align; 55 char *s2 = src2 + s2align; 56 int r; 57 58 if (err_count >= ERR_LIMIT) 59 return; 60 if (len > LEN || s1align >= A || s2align >= A) 61 abort (); 62 if (diffpos >= len) 63 abort (); 64 if ((diffpos < 0) != (delta == 0)) 65 abort (); 66 67 for (int i = 0; i < len + A; i++) 68 src1[i] = src2[i] = '?'; 69 for (int i = 0; i < len; i++) 70 s1[i] = s2[i] = 'a' + i % 23; 71 if (delta) 72 s1[diffpos] += delta; 73 s1[len] = s2[len] = '\0'; 74 75 size_t mte_len = maxlen < len + 1 ? maxlen : len + 1; 76 s1 = tag_buffer (s1, mte_len, fun->test_mte); 77 s2 = tag_buffer (s2, mte_len, fun->test_mte); 78 r = fun->fun (s1, s2, maxlen); 79 untag_buffer (s1, mte_len, fun->test_mte); 80 untag_buffer (s2, mte_len, fun->test_mte); 81 82 if (diffpos >= maxlen) 83 { 84 diffpos = -1; 85 delta = 0; 86 } 87 if ((delta == 0 && r != 0) || (delta > 0 && r <= 0) || (delta < 0 && r >= 0)) 88 { 89 ERR ( 90 "%s(align %d, align %d, %d) (len=%d, diffpos=%d) failed, returned %d\n", 91 fun->name, s1align, s2align, maxlen, len, diffpos, r); 92 quoteat ("src1", src1, len + A, diffpos); 93 quoteat ("src2", src2, len + A, diffpos); 94 } 95 } 96 97 int 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, 0); 111 test (funtab + i, d, s, 1, -1, 0, 0); 112 test (funtab + i, d, s, 0, -1, 1, 0); 113 test (funtab + i, d, s, 1, -1, 1, 0); 114 test (funtab + i, d, s, 2, -1, 1, 0); 115 test (funtab + i, d, s, 1, 0, 1, 1); 116 test (funtab + i, d, s, 1, 0, 1, -1); 117 for (n = 2; n < 100; n++) 118 { 119 test (funtab + i, d, s, n, -1, n, 0); 120 test (funtab + i, d, s, n, n / 2, n, 1); 121 test (funtab + i, d, s, n / 2, -1, n, 0); 122 test (funtab + i, d, s, n / 2, n / 2, n, -1); 123 } 124 for (; n < LEN; n *= 2) 125 { 126 test (funtab + i, d, s, n, -1, n, 0); 127 test (funtab + i, d, s, n, n / 2, n, -1); 128 test (funtab + i, d, s, n / 2, -1, n, 0); 129 test (funtab + i, d, s, n / 2, n / 2, n, 1); 130 } 131 } 132 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS"; 133 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name); 134 if (err_count) 135 r = -1; 136 } 137 return r; 138 } 139