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__)
30 char *malloc_options = "S";
31 #endif /* __OpenBSD__ */
32
33 void *
xmalloc(size_t size)34 xmalloc(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
46 void *
xcalloc(size_t nmemb,size_t size)47 xcalloc(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
62 void *
xreallocarray(void * ptr,size_t nmemb,size_t size)63 xreallocarray(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
74 void *
xrecallocarray(void * ptr,size_t onmemb,size_t nmemb,size_t size)75 xrecallocarray(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
86 char *
xstrdup(const char * str)87 xstrdup(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
97 int
xvasprintf(char ** ret,const char * fmt,va_list ap)98 xvasprintf(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
108 int
xasprintf(char ** ret,const char * fmt,...)109 xasprintf(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