1/* $OpenBSD: xmalloc.c,v 1.37 2022/03/13 23:27:54 cheloha Exp $ */ 2/* 3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 5 * All rights reserved 6 * Versions of malloc and friends that check their results, and never return 7 * failure (they call fatal if they encounter an error). 8 * 9 * As far as I am concerned, the code I have written for this software 10 * can be used freely for any purpose. Any derived versions of this 11 * software must be clearly marked as such, and if the derived work is 12 * incompatible with the protocol description in the RFC file, it must be 13 * called by a name other than "ssh" or "Secure Shell". 14 */ 15 16#include "includes.h" 17 18#include <stdarg.h> 19#ifdef HAVE_STDINT_H 20# include <stdint.h> 21#endif 22#include <stdio.h> 23#include <stdlib.h> 24#include <string.h> 25 26#include "xmalloc.h" 27#include "log.h" 28 29#if defined(__OpenBSD__) 30char *malloc_options = "S"; 31#endif /* __OpenBSD__ */ 32 33void * 34xmalloc(size_t size) 35{ 36 void *ptr; 37 38 if (size == 0) 39 fatal("xmalloc: zero size"); 40 ptr = malloc(size); 41 if (ptr == NULL) 42 fatal("xmalloc: out of memory (allocating %zu bytes)", size); 43 return ptr; 44} 45 46void * 47xcalloc(size_t nmemb, size_t size) 48{ 49 void *ptr; 50 51 if (size == 0 || nmemb == 0) 52 fatal("xcalloc: zero size"); 53 if (SIZE_MAX / nmemb < size) 54 fatal("xcalloc: nmemb * size > SIZE_MAX"); 55 ptr = calloc(nmemb, size); 56 if (ptr == NULL) 57 fatal("xcalloc: out of memory (allocating %zu bytes)", 58 size * nmemb); 59 return ptr; 60} 61 62void * 63xreallocarray(void *ptr, size_t nmemb, size_t size) 64{ 65 void *new_ptr; 66 67 new_ptr = reallocarray(ptr, nmemb, size); 68 if (new_ptr == NULL) 69 fatal("xreallocarray: out of memory (%zu elements of %zu bytes)", 70 nmemb, size); 71 return new_ptr; 72} 73 74void * 75xrecallocarray(void *ptr, size_t onmemb, size_t nmemb, size_t size) 76{ 77 void *new_ptr; 78 79 new_ptr = recallocarray(ptr, onmemb, nmemb, size); 80 if (new_ptr == NULL) 81 fatal("xrecallocarray: out of memory (%zu elements of %zu bytes)", 82 nmemb, size); 83 return new_ptr; 84} 85 86char * 87xstrdup(const char *str) 88{ 89 size_t len; 90 char *cp; 91 92 len = strlen(str) + 1; 93 cp = xmalloc(len); 94 return memcpy(cp, str, len); 95} 96 97int 98xvasprintf(char **ret, const char *fmt, va_list ap) 99{ 100 int i; 101 102 i = vasprintf(ret, fmt, ap); 103 if (i < 0 || *ret == NULL) 104 fatal("xvasprintf: could not allocate memory"); 105 return i; 106} 107 108int 109xasprintf(char **ret, const char *fmt, ...) 110{ 111 va_list ap; 112 int i; 113 114 va_start(ap, fmt); 115 i = xvasprintf(ret, fmt, ap); 116 va_end(ap); 117 return i; 118} 119