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, 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 * 49 alignup (void *p) 50 { 51 return (void *) (((uintptr_t) p + A - 1) & -A); 52 } 53 54 static void 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 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