1 /* 2 * memset 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 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 #elif __arm__ 29 F(__memset_arm, 0) 30 #endif 31 {0, 0, 0} 32 // clang-format on 33 }; 34 #undef F 35 36 #define A 32 37 #define LEN 250000 38 static unsigned char *sbuf; 39 40 static void * 41 alignup (void *p) 42 { 43 return (void *) (((uintptr_t) p + A - 1) & -A); 44 } 45 46 static void 47 test (const struct fun *fun, int salign, int c, int len) 48 { 49 unsigned char *src = alignup (sbuf); 50 unsigned char *s = src + salign; 51 void *p; 52 int i; 53 54 if (err_count >= ERR_LIMIT) 55 return; 56 if (len > LEN || salign >= A) 57 abort (); 58 for (i = 0; i < len + A; i++) 59 src[i] = '?'; 60 for (i = 0; i < len; i++) 61 s[i] = 'a' + i % 23; 62 63 s = tag_buffer (s, len, fun->test_mte); 64 p = fun->fun (s, c, len); 65 untag_buffer (s, len, fun->test_mte); 66 67 if (p != s) 68 ERR ("%s(%p,..) returned %p\n", fun->name, s, p); 69 70 for (i = 0; i < salign; i++) 71 { 72 if (src[i] != '?') 73 { 74 ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len); 75 quoteat ("got", src, len + A, i); 76 return; 77 } 78 } 79 for (; i < salign + len; i++) 80 { 81 if (src[i] != (unsigned char) c) 82 { 83 ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len); 84 quoteat ("got", src, len + A, i); 85 return; 86 } 87 } 88 for (; i < len + A; i++) 89 { 90 if (src[i] != '?') 91 { 92 ERR ("%s(align %d, %d, %d) failed\n", fun->name, salign, c, len); 93 quoteat ("got", src, len + A, i); 94 return; 95 } 96 } 97 } 98 99 int 100 main () 101 { 102 sbuf = mte_mmap (LEN + 2 * A); 103 int r = 0; 104 for (int i = 0; funtab[i].name; i++) 105 { 106 err_count = 0; 107 for (int s = 0; s < A; s++) 108 { 109 int n; 110 for (n = 0; n < 100; n++) 111 { 112 test (funtab + i, s, 0, n); 113 test (funtab + i, s, 0x25, n); 114 test (funtab + i, s, 0xaa25, n); 115 } 116 for (; n < LEN; n *= 2) 117 { 118 test (funtab + i, s, 0, n); 119 test (funtab + i, s, 0x25, n); 120 test (funtab + i, s, 0xaa25, n); 121 } 122 } 123 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS"; 124 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name); 125 if (err_count) 126 r = -1; 127 } 128 return r; 129 } 130