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/* xmalloc.c -- safe versions of malloc and realloc */
/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
This file is part of GNU Bash, the GNU Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#if defined (HAVE_CONFIG_H)
#include <config.h>
#endif
#include "bashtypes.h"
#include <stdio.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#if defined (HAVE_STDLIB_H)
# include <stdlib.h>
#else
# include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */
#include "error.h"
#include "bashintl.h"
#if !defined (PTR_T)
# if defined (__STDC__)
# define PTR_T void *
# else
# define PTR_T char *
# endif /* !__STDC__ */
#endif /* !PTR_T */
#if HAVE_SBRK && !HAVE_DECL_SBRK
extern char *sbrk();
#endif
#if HAVE_SBRK && defined (USING_BASH_MALLOC)
static PTR_T lbreak;
static int brkfound;
static size_t allocated;
#endif
/* **************************************************************** */
/* */
/* Memory Allocation and Deallocation. */
/* */
/* **************************************************************** */
#if HAVE_SBRK && defined (USING_BASH_MALLOC)
#define FINDBRK() \
do { \
if (brkfound == 0) \
{ \
lbreak = (PTR_T)sbrk (0); \
brkfound++; \
} \
} while (0)
static size_t
findbrk ()
{
FINDBRK();
return (char *)sbrk (0) - (char *)lbreak;
}
#else
#define FINDBRK()
#endif
static void
allocerr (func, bytes)
const char *func;
size_t bytes;
{
#if HAVE_SBRK && defined (USING_BASH_MALLOC)
allocated = findbrk ();
fatal_error (_("%s: cannot allocate %lu bytes (%lu bytes allocated)"), func, (unsigned long)bytes, (unsigned long)allocated);
#else
fatal_error (_("%s: cannot allocate %lu bytes"), func, (unsigned long)bytes);
#endif /* !HAVE_SBRK */
}
/* Return a pointer to free()able block of memory large enough
to hold BYTES number of bytes. If the memory cannot be allocated,
print an error message and abort. */
PTR_T
xmalloc (bytes)
size_t bytes;
{
PTR_T temp;
#if defined (DEBUG)
if (bytes == 0)
internal_warning("xmalloc: size argument is 0");
#endif
FINDBRK();
temp = malloc (bytes);
if (temp == 0)
allocerr ("xmalloc", bytes);
return (temp);
}
PTR_T
xrealloc (pointer, bytes)
PTR_T pointer;
size_t bytes;
{
PTR_T temp;
#if defined (DEBUG)
if (bytes == 0)
internal_warning("xrealloc: size argument is 0");
#endif
FINDBRK();
temp = pointer ? realloc (pointer, bytes) : malloc (bytes);
if (temp == 0)
allocerr ("xrealloc", bytes);
return (temp);
}
/* Use this as the function to call when adding unwind protects so we
don't need to know what free() returns. */
void
xfree (string)
PTR_T string;
{
if (string)
free (string);
}
#ifdef USING_BASH_MALLOC
#include <malloc/shmalloc.h>
static void
sh_allocerr (func, bytes, file, line)
const char *func;
size_t bytes;
char *file;
int line;
{
#if HAVE_SBRK
allocated = findbrk ();
fatal_error (_("%s: %s:%d: cannot allocate %lu bytes (%lu bytes allocated)"), func, file, line, (unsigned long)bytes, (unsigned long)allocated);
#else
fatal_error (_("%s: %s:%d: cannot allocate %lu bytes"), func, file, line, (unsigned long)bytes);
#endif /* !HAVE_SBRK */
}
PTR_T
sh_xmalloc (bytes, file, line)
size_t bytes;
char *file;
int line;
{
PTR_T temp;
#if defined (DEBUG)
if (bytes == 0)
internal_warning("xmalloc: %s:%d: size argument is 0", file, line);
#endif
FINDBRK();
temp = sh_malloc (bytes, file, line);
if (temp == 0)
sh_allocerr ("xmalloc", bytes, file, line);
return (temp);
}
PTR_T
sh_xrealloc (pointer, bytes, file, line)
PTR_T pointer;
size_t bytes;
char *file;
int line;
{
PTR_T temp;
#if defined (DEBUG)
if (bytes == 0)
internal_warning("xrealloc: %s:%d: size argument is 0", file, line);
#endif
FINDBRK();
temp = pointer ? sh_realloc (pointer, bytes, file, line) : sh_malloc (bytes, file, line);
if (temp == 0)
sh_allocerr ("xrealloc", bytes, file, line);
return (temp);
}
void
sh_xfree (string, file, line)
PTR_T string;
char *file;
int line;
{
if (string)
sh_free (string, file, line);
}
#endif
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