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 * 50 alignup (void *p) 51 { 52 return (void *) (((uintptr_t) p + A - 1) & -A); 53 } 54 55 static void 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 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