132 lines
1.9 KiB
C
132 lines
1.9 KiB
C
/*
|
|
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
|
|
* Copyright (c) 2015-2018 The strace developers.
|
|
* All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: LGPL-2.1-or-later
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "error_prints.h"
|
|
#include "xmalloc.h"
|
|
|
|
static void
|
|
die_out_of_memory(void)
|
|
{
|
|
static int recursed;
|
|
|
|
if (recursed)
|
|
exit(1);
|
|
recursed = 1;
|
|
|
|
error_msg_and_die("Out of memory");
|
|
}
|
|
|
|
void *
|
|
xmalloc(size_t size)
|
|
{
|
|
void *p = malloc(size);
|
|
|
|
if (!p)
|
|
die_out_of_memory();
|
|
|
|
return p;
|
|
}
|
|
|
|
void *
|
|
xcalloc(size_t nmemb, size_t size)
|
|
{
|
|
void *p = calloc(nmemb, size);
|
|
|
|
if (!p)
|
|
die_out_of_memory();
|
|
|
|
return p;
|
|
}
|
|
|
|
#define HALF_SIZE_T (((size_t) 1) << (sizeof(size_t) * 4))
|
|
|
|
void *
|
|
xreallocarray(void *ptr, size_t nmemb, size_t size)
|
|
{
|
|
size_t bytes = nmemb * size;
|
|
|
|
if ((nmemb | size) >= HALF_SIZE_T &&
|
|
size && bytes / size != nmemb)
|
|
die_out_of_memory();
|
|
|
|
void *p = realloc(ptr, bytes);
|
|
|
|
if (!p)
|
|
die_out_of_memory();
|
|
|
|
return p;
|
|
}
|
|
|
|
void *
|
|
xgrowarray(void *const ptr, size_t *const nmemb, const size_t memb_size)
|
|
{
|
|
/* this is the same value as glibc DEFAULT_MXFAST */
|
|
enum { DEFAULT_ALLOC_SIZE = 64 * SIZEOF_LONG / 4 };
|
|
|
|
size_t grow_memb;
|
|
|
|
if (ptr == NULL)
|
|
grow_memb = *nmemb ? 0 :
|
|
(DEFAULT_ALLOC_SIZE + memb_size - 1) / memb_size;
|
|
else
|
|
grow_memb = (*nmemb >> 1) + 1;
|
|
|
|
if ((*nmemb + grow_memb) < *nmemb)
|
|
die_out_of_memory();
|
|
|
|
*nmemb += grow_memb;
|
|
|
|
return xreallocarray(ptr, *nmemb, memb_size);
|
|
}
|
|
|
|
char *
|
|
xstrdup(const char *str)
|
|
{
|
|
if (!str)
|
|
return NULL;
|
|
|
|
char *p = strdup(str);
|
|
|
|
if (!p)
|
|
die_out_of_memory();
|
|
|
|
return p;
|
|
}
|
|
|
|
char *
|
|
xstrndup(const char *str, size_t n)
|
|
{
|
|
char *p;
|
|
|
|
if (!str)
|
|
return NULL;
|
|
|
|
#ifdef HAVE_STRNDUP
|
|
p = strndup(str, n);
|
|
#else
|
|
p = xmalloc(n + 1);
|
|
#endif
|
|
|
|
if (!p)
|
|
die_out_of_memory();
|
|
|
|
#ifndef HAVE_STRNDUP
|
|
strncpy(p, str, n);
|
|
p[n] = '\0';
|
|
#endif
|
|
|
|
return p;
|
|
}
|