1 /* 2 * strchrnul test. 3 * 4 * Copyright (c) 2019-2020, Arm Limited. 5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception 6 */ 7 8 #ifndef _GNU_SOURCE 9 #define _GNU_SOURCE 10 #endif 11 12 #include <stdint.h> 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <string.h> 16 #include <limits.h> 17 #include "mte.h" 18 #include "stringlib.h" 19 #include "stringtest.h" 20 21 #define F(x, mte) {#x, x, mte}, 22 23 static const struct fun 24 { 25 const char *name; 26 char *(*fun) (const char *s, int c); 27 int test_mte; 28 } funtab[] = { 29 // clang-format off 30 F(strchrnul, 0) 31 #if __aarch64__ 32 F(__strchrnul_aarch64, 0) 33 F(__strchrnul_aarch64_mte, 1) 34 # if __ARM_FEATURE_SVE 35 F(__strchrnul_aarch64_sve, 1) 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 seekpos, int len) 55 { 56 char *src = alignup (sbuf); 57 char *s = src + align; 58 char *f = seekpos != -1 ? s + seekpos : s + len; 59 int seekchar = 0x1; 60 void *p; 61 62 if (err_count >= ERR_LIMIT) 63 return; 64 if (len > LEN || seekpos >= len || align >= ALIGN) 65 abort (); 66 67 for (int i = 0; src + i < s; i++) 68 src[i] = (i + len) & 1 ? seekchar : 0; 69 for (int i = 1; i <= ALIGN; i++) 70 s[len + i] = (i + len) & 1 ? seekchar : 0; 71 for (int i = 0; i < len; i++) 72 s[i] = 'a' + (i & 31); 73 if (seekpos != -1) 74 s[seekpos] = seekchar; 75 if (seekpos != -1 && (len + align) & 1) 76 s[seekpos + 1] = seekchar; 77 s[len] = '\0'; 78 79 int mte_len = seekpos != -1 ? seekpos + 1 : len + 1; 80 s = tag_buffer (s, mte_len, fun->test_mte); 81 p = fun->fun (s, seekchar); 82 untag_buffer (s, mte_len, fun->test_mte); 83 p = untag_pointer (p); 84 85 if (p != f) 86 { 87 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n", 88 fun->name, s, seekchar, len, p, f, seekpos); 89 quote ("input", s, len); 90 } 91 92 s = tag_buffer (s, len + 1, fun->test_mte); 93 p = fun->fun (s, 0); 94 untag_buffer (s, len + 1, fun->test_mte); 95 96 if (p != s + len) 97 { 98 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n", 99 fun->name, s, 0, len, p, f, len); 100 quote ("input", s, len); 101 } 102 } 103 104 int 105 main (void) 106 { 107 sbuf = mte_mmap (LEN + 3 * ALIGN); 108 int r = 0; 109 for (int i = 0; funtab[i].name; i++) 110 { 111 err_count = 0; 112 for (int a = 0; a < ALIGN; a++) 113 for (int n = 0; n < LEN; n++) 114 { 115 for (int sp = 0; sp < n; sp++) 116 test (funtab + i, a, sp, n); 117 test (funtab + i, a, -1, n); 118 } 119 120 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS"; 121 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name); 122 if (err_count) 123 r = -1; 124 } 125 return r; 126 } 127