1 /* 2 * strrchr test. 3 * 4 * Copyright (c) 2019-2021, 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 char *(*fun) (const char *s, int c); 23 int test_mte; 24 } funtab[] = { 25 // clang-format off 26 F(strrchr, 0) 27 #if __aarch64__ 28 F(__strrchr_aarch64, 0) 29 F(__strrchr_aarch64_mte, 1) 30 # if __ARM_FEATURE_SVE 31 F(__strrchr_aarch64_sve, 1) 32 # endif 33 #endif 34 {0, 0, 0} 35 // clang-format on 36 }; 37 #undef F 38 39 #define ALIGN 32 40 #define LEN 512 41 static char *sbuf; 42 43 static void * 44 alignup (void *p) 45 { 46 return (void *) (((uintptr_t) p + ALIGN - 1) & -ALIGN); 47 } 48 49 static void 50 test (const struct fun *fun, int align, int seekpos, int len) 51 { 52 char *src = alignup (sbuf); 53 char *s = src + align; 54 char *f = seekpos != -1 ? s + seekpos : 0; 55 int seekchar = 0x1; 56 void *p; 57 58 if (err_count >= ERR_LIMIT) 59 return; 60 if (len > LEN || seekpos >= len || align >= ALIGN) 61 abort (); 62 63 for (int i = 0; src + i < s; i++) 64 src[i] = (i + len) & 1 ? seekchar : 0; 65 for (int i = 1; i <= ALIGN; i++) 66 s[len + i] = (i + len) & 1 ? seekchar : 0; 67 for (int i = 0; i < len; i++) 68 s[i] = 'a' + (i & 31); 69 if (seekpos != -1) 70 s[seekpos / 2] = s[seekpos] = seekchar; 71 if (seekpos > 0 && (len + align) & 1) 72 s[seekpos - 1] = seekchar; 73 s[len] = '\0'; 74 75 s = tag_buffer (s, len + 1, fun->test_mte); 76 p = fun->fun (s, seekchar); 77 untag_buffer (s, len + 1, fun->test_mte); 78 p = untag_pointer (p); 79 80 if (p != f) 81 { 82 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n", 83 fun->name, s, seekchar, len, p, f, seekpos); 84 quote ("input", s, len); 85 } 86 87 s = tag_buffer (s, len + 1, fun->test_mte); 88 p = fun->fun (s, 0); 89 untag_buffer (s, len + 1, fun->test_mte); 90 91 if (p != s + len) 92 { 93 ERR ("%s (%p, 0x%02x) len %d returned %p, expected %p pos %d\n", 94 fun->name, s, 0, len, p, s + len, len); 95 quote ("input", s, len); 96 } 97 } 98 99 int 100 main (void) 101 { 102 sbuf = mte_mmap (LEN + 3 * ALIGN); 103 int r = 0; 104 for (int i = 0; funtab[i].name; i++) 105 { 106 err_count = 0; 107 for (int a = 0; a < ALIGN; a++) 108 for (int n = 0; n < LEN; n++) 109 { 110 for (int sp = 0; sp < n; sp++) 111 test (funtab + i, a, sp, n); 112 test (funtab + i, a, -1, n); 113 } 114 115 char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS"; 116 printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name); 117 if (err_count) 118 r = -1; 119 } 120 return r; 121 } 122