1 /* 2 * memset test. 3 * 4 * Copyright (c) 2019-2023, 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 "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 void *(*fun) (void *s, int c, size_t n); 22 int test_mte; 23 } funtab[] = { 24 // clang-format off 25 F(memset, 0) 26 #if __aarch64__ 27 F(__memset_aarch64, 1) 28 # if WANT_MOPS 29 F(__memset_aarch64_mops, 1) 30 # endif 31 #elif __arm__ 32 F(__memset_arm, 0) 33 #endif 34 {0, 0, 0} 35 // clang-format on 36 }; 37 #undef F 38 39 #define A 32 40 #define LEN 250000 41 static unsigned char *sbuf; 42 43 static void * 44 alignup (void *p) 45 { 46 return (void *) (((uintptr_t) p + A - 1) & -A); 47 } 48 49 static void 50 test (const struct fun *fun, int salign, int c, int len) 51 { 52 unsigned char *src = alignup (sbuf); 53 unsigned char *s = src + salign; 54 void *p; 55 int i; 56 57 if (err_count >= ERR_LIMIT) 58 return; 59 if (len > LEN || salign >= A) 60 abort (); 61 for (i = 0; i < len + A; i++) 62 src[i] = '?'; 63 for (i = 0; i < len; i++) 64 s[i] = 'a' + i % 23; 65 66 s = tag_buffer (s, len, fun->test_mte); 67 p = fun->fun (s, c, len); 68 untag_buffer (s, len, fun->test_mte); 69 70 if (p != s) 71 ERR ("%s(%p,..) returned %p\n", fun->name, s, p); 72 73 for (i = 0; i < salign; i++) 74 { 75 if (src[i] != '?') 76 { 77 ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len); 78 quoteat ("got", src, len + A, i); 79 return; 80 } 81 } 82 for (; i < salign + len; i++) 83 { 84 if (src[i] != (unsigned char) c) 85 { 86 ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len); 87 quoteat ("got", src, len + A, i); 88 return; 89 } 90 } 91 for (; i < len + A; i++) 92 { 93 if (src[i] != '?') 94 { 95 ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len); 96 quoteat ("got", src, len + A, i); 97 return; 98 } 99 } 100 } 101 102 int 103 main () 104 { 105 sbuf = mte_mmap (LEN + 2 * A); 106 int r = 0; 107 for (int i = 0; funtab[i].name; i++) 108 { 109 err_count = 0; 110 for (int s = 0; s < A; s++) 111 { 112 int n; 113 for (n = 0; n < 100; n++) 114 { 115 test (funtab + i, s, 0, n); 116 test (funtab + i, s, 0x25, n); 117 test (funtab + i, s, 0xaa25, n); 118 } 119 for (; n < LEN; n *= 2) 120 { 121 test (funtab + i, s, 0, n); 122 test (funtab + i, s, 0x25, n); 123 test (funtab + i, s, 0xaa25, n); 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