freebsd-nq/crypto/openssh/xmalloc.c

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/* $OpenBSD: xmalloc.c,v 1.33 2016/02/15 09:47:49 dtucker Exp $ */
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/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
* Versions of malloc and friends that check their results, and never return
* failure (they call fatal if they encounter an error).
*
* As far as I am concerned, the code I have written for this software
* can be used freely for any purpose. Any derived versions of this
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
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*/
#include "includes.h"
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#include <stdarg.h>
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#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include "xmalloc.h"
#include "log.h"
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void
ssh_malloc_init(void)
{
#if defined(__OpenBSD__)
extern char *malloc_options;
malloc_options = "S";
#endif /* __OpenBSD__ */
}
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void *
xmalloc(size_t size)
{
void *ptr;
if (size == 0)
fatal("xmalloc: zero size");
ptr = malloc(size);
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if (ptr == NULL)
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fatal("xmalloc: out of memory (allocating %zu bytes)", size);
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return ptr;
}
void *
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xcalloc(size_t nmemb, size_t size)
{
void *ptr;
if (size == 0 || nmemb == 0)
fatal("xcalloc: zero size");
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if (SIZE_MAX / nmemb < size)
fatal("xcalloc: nmemb * size > SIZE_MAX");
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ptr = calloc(nmemb, size);
if (ptr == NULL)
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fatal("xcalloc: out of memory (allocating %zu bytes)",
size * nmemb);
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return ptr;
}
void *
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xreallocarray(void *ptr, size_t nmemb, size_t size)
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{
void *new_ptr;
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new_ptr = reallocarray(ptr, nmemb, size);
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if (new_ptr == NULL)
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fatal("xreallocarray: out of memory (%zu elements of %zu bytes)",
nmemb, size);
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return new_ptr;
}
char *
xstrdup(const char *str)
{
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size_t len;
char *cp;
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len = strlen(str) + 1;
cp = xmalloc(len);
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strlcpy(cp, str, len);
return cp;
}
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int
xasprintf(char **ret, const char *fmt, ...)
{
va_list ap;
int i;
va_start(ap, fmt);
i = vasprintf(ret, fmt, ap);
va_end(ap);
if (i < 0 || *ret == NULL)
fatal("xasprintf: could not allocate memory");
return (i);
}