xmalloc.c revision 259290
1/*- 2 * Copyright 1996-1998 John D. Polstra. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD: stable/10/libexec/rtld-elf/xmalloc.c 259290 2013-12-13 06:00:44Z kib $ 26 */ 27 28#include <stddef.h> 29#include <stdlib.h> 30#include <string.h> 31#include <unistd.h> 32#include "rtld.h" 33#include "rtld_printf.h" 34 35void * 36xcalloc(size_t number, size_t size) 37{ 38 void *p; 39 40 p = calloc(number, size); 41 if (p == NULL) { 42 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 43 _exit(1); 44 } 45 return (p); 46} 47 48void * 49xmalloc(size_t size) 50{ 51 void *p = malloc(size); 52 if (p == NULL) { 53 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 54 _exit(1); 55 } 56 return p; 57} 58 59char * 60xstrdup(const char *str) 61{ 62 char *copy; 63 size_t len; 64 65 len = strlen(str) + 1; 66 copy = xmalloc(len); 67 memcpy(copy, str, len); 68 return (copy); 69} 70 71void * 72malloc_aligned(size_t size, size_t align) 73{ 74 void *mem, *res; 75 uintptr_t x; 76 size_t asize, r; 77 78 r = round(sizeof(void *), align); 79 asize = round(size, align) + r; 80 mem = xmalloc(asize); 81 x = (uintptr_t)mem; 82 res = (void *)round(x, align); 83 *(void **)((uintptr_t)res - sizeof(void *)) = mem; 84 return (res); 85} 86 87void 88free_aligned(void *ptr) 89{ 90 void *mem; 91 uintptr_t x; 92 93 if (ptr == NULL) 94 return; 95 x = (uintptr_t)ptr; 96 x -= sizeof(void *); 97 mem = *(void **)x; 98 free(mem); 99} 100