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 <stdarg.h>
17 #include <stdint.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <string.h>
21
22 #include "xmalloc.h"
23 #include "log.h"
24
25 char *malloc_options = "S";
26
27 void *
xmalloc(size_t size)28 xmalloc(size_t size)
29 {
30 void *ptr;
31
32 if (size == 0)
33 fatal("xmalloc: zero size");
34 ptr = malloc(size);
35 if (ptr == NULL)
36 fatal("xmalloc: out of memory (allocating %zu bytes)", size);
37 return ptr;
38 }
39
40 void *
xcalloc(size_t nmemb,size_t size)41 xcalloc(size_t nmemb, size_t size)
42 {
43 void *ptr;
44
45 if (size == 0 || nmemb == 0)
46 fatal("xcalloc: zero size");
47 if (SIZE_MAX / nmemb < size)
48 fatal("xcalloc: nmemb * size > SIZE_MAX");
49 ptr = calloc(nmemb, size);
50 if (ptr == NULL)
51 fatal("xcalloc: out of memory (allocating %zu bytes)",
52 size * nmemb);
53 return ptr;
54 }
55
56 void *
xreallocarray(void * ptr,size_t nmemb,size_t size)57 xreallocarray(void *ptr, size_t nmemb, size_t size)
58 {
59 void *new_ptr;
60
61 new_ptr = reallocarray(ptr, nmemb, size);
62 if (new_ptr == NULL)
63 fatal("xreallocarray: out of memory (%zu elements of %zu bytes)",
64 nmemb, size);
65 return new_ptr;
66 }
67
68 void *
xrecallocarray(void * ptr,size_t onmemb,size_t nmemb,size_t size)69 xrecallocarray(void *ptr, size_t onmemb, size_t nmemb, size_t size)
70 {
71 void *new_ptr;
72
73 new_ptr = recallocarray(ptr, onmemb, nmemb, size);
74 if (new_ptr == NULL)
75 fatal("xrecallocarray: out of memory (%zu elements of %zu bytes)",
76 nmemb, size);
77 return new_ptr;
78 }
79
80 char *
xstrdup(const char * str)81 xstrdup(const char *str)
82 {
83 size_t len;
84 char *cp;
85
86 len = strlen(str) + 1;
87 cp = xmalloc(len);
88 return memcpy(cp, str, len);
89 }
90
91 int
xvasprintf(char ** ret,const char * fmt,va_list ap)92 xvasprintf(char **ret, const char *fmt, va_list ap)
93 {
94 int i;
95
96 i = vasprintf(ret, fmt, ap);
97 if (i < 0 || *ret == NULL)
98 fatal("xvasprintf: could not allocate memory");
99 return i;
100 }
101
102 int
xasprintf(char ** ret,const char * fmt,...)103 xasprintf(char **ret, const char *fmt, ...)
104 {
105 va_list ap;
106 int i;
107
108 va_start(ap, fmt);
109 i = xvasprintf(ret, fmt, ap);
110 va_end(ap);
111 return i;
112 }
113