1 /* $OpenBSD: xmalloc.c,v 1.33 2016/02/15 09:47:49 dtucker 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 void 30 ssh_malloc_init(void) 31 { 32 #if defined(__OpenBSD__) 33 extern char *malloc_options; 34 35 malloc_options = "S"; 36 #endif /* __OpenBSD__ */ 37 } 38 39 void * 40 xmalloc(size_t size) 41 { 42 void *ptr; 43 44 if (size == 0) 45 fatal("xmalloc: zero size"); 46 ptr = malloc(size); 47 if (ptr == NULL) 48 fatal("xmalloc: out of memory (allocating %zu bytes)", size); 49 return ptr; 50 } 51 52 void * 53 xcalloc(size_t nmemb, size_t size) 54 { 55 void *ptr; 56 57 if (size == 0 || nmemb == 0) 58 fatal("xcalloc: zero size"); 59 if (SIZE_MAX / nmemb < size) 60 fatal("xcalloc: nmemb * size > SIZE_MAX"); 61 ptr = calloc(nmemb, size); 62 if (ptr == NULL) 63 fatal("xcalloc: out of memory (allocating %zu bytes)", 64 size * nmemb); 65 return ptr; 66 } 67 68 void * 69 xreallocarray(void *ptr, size_t nmemb, size_t size) 70 { 71 void *new_ptr; 72 73 new_ptr = reallocarray(ptr, nmemb, size); 74 if (new_ptr == NULL) 75 fatal("xreallocarray: out of memory (%zu elements of %zu bytes)", 76 nmemb, size); 77 return new_ptr; 78 } 79 80 char * 81 xstrdup(const char *str) 82 { 83 size_t len; 84 char *cp; 85 86 len = strlen(str) + 1; 87 cp = xmalloc(len); 88 strlcpy(cp, str, len); 89 return cp; 90 } 91 92 int 93 xasprintf(char **ret, const char *fmt, ...) 94 { 95 va_list ap; 96 int i; 97 98 va_start(ap, fmt); 99 i = vasprintf(ret, fmt, ap); 100 va_end(ap); 101 102 if (i < 0 || *ret == NULL) 103 fatal("xasprintf: could not allocate memory"); 104 105 return (i); 106 } 107