1 /* 2 * strlen 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 <limits.h> 13 #include "mte.h" 14 #include "stringlib.h" 15 #include "stringtest.h" 16 17 #define F(x, mte) {#x, x, mte}, 18 19 static const struct fun 20 { 21 const char *name; 22 size_t (*fun) (const char *s); 23 int test_mte; 24 } funtab[] = { 25 // clang-format off 26 F(strlen, 0) 27 #if __aarch64__ 28 F(__strlen_aarch64, 0) 29 F(__strlen_aarch64_mte, 1) 30 # if __ARM_FEATURE_SVE 31 F(__strlen_aarch64_sve, 1) 32 # endif 33 #elif __arm__ 34 # if __ARM_ARCH >= 6 && __ARM_ARCH_ISA_THUMB == 2 35 F(__strlen_armv6t2, 0) 36 # endif 37 #endif 38 {0, 0, 0} 39 // clang-format on 40 }; 41 #undef F 42 43 #define ALIGN 32 44 #define LEN 512 45 static char *sbuf; 46 47 static void * 48 alignup (void *p) 49 { 50 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN); 51 } 52 53 static void 54 test (const struct fun *fun, int align, int len) 55 { 56 char *src = alignup (sbuf); 57 char *s = src + align; 58 size_t r; 59 60 if (err_count >= ERR_LIMIT) 61 return; 62 if (len > LEN || align >= ALIGN) 63 abort (); 64 65 for (int i = 0; src + i < s; i++) 66 src[i] = 0; 67 for (int i = 1; i <= ALIGN; i++) 68 s[len + i] = (len + align) & 1 ? 1 : 0; 69 for (int i = 0; i < len; i++) 70 s[i] = 'a' + (i & 31); 71 s[len] = '\0'; 72 73 s = tag_buffer (s, len + 1, fun->test_mte); 74 r = fun->fun (s); 75 untag_buffer (s, len + 1, fun->test_mte); 76 77 if (r != len) 78 { 79 ERR ("%s (%p) returned %zu expected %d\n", fun->name, s, r, len); 80 quote ("input", src, len); 81 } 82 } 83 84 int 85 main (void) 86 { 87 sbuf = mte_mmap (LEN + 3 * ALIGN); 88 int r = 0; 89 for (int i = 0; funtab[i].name; i++) 90 { 91 err_count = 0; 92 for (int a = 0; a < ALIGN; a++) 93 for (int n = 0; n < LEN; n++) 94 test (funtab + i, a, n); 95 96 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS"; 97 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name); 98 if (err_count) 99 r = -1; 100 } 101 return r; 102 } 103