malloc.c File Reference

Wrappers for C malloc code, and replacements for items that may be missing. More...

#include "orconfig.h"
#include <stdlib.h>
#include <string.h>
#include "lib/testsupport/testsupport.h"
#include "lib/malloc/malloc.h"
#include "lib/cc/torint.h"
#include "lib/err/torerr.h"

Go to the source code of this file.

Macros
#define	UTIL_MALLOC_PRIVATE
#define	SQRT_SIZE_MAX_P1   (((size_t)1) << (sizeof(size_t)*4))

Functions
void *	tor_malloc_ (size_t size)
void *	tor_malloc_zero_ (size_t size)
STATIC int	size_mul_check (const size_t x, const size_t y)
void *	tor_calloc_ (size_t nmemb, size_t size)
void *	tor_realloc_ (void *ptr, size_t size)
void *	tor_reallocarray_ (void *ptr, size_t sz1, size_t sz2)
char *	tor_strdup_ (const char *s)
char *	tor_strndup_ (const char *s, size_t n)
void *	tor_memdup_ (const void *mem, size_t len)
void *	tor_memdup_nulterm_ (const void *mem, size_t len)
void	tor_free_ (void *mem)

Detailed Description

Wrappers for C malloc code, and replacements for items that may be missing.

Definition in file malloc.c.

Macro Definition Documentation

SQRT_SIZE_MAX_P1

#define SQRT_SIZE_MAX_P1   (((size_t)1) << (sizeof(size_t)*4))

Definition at line 81 of file malloc.c.

UTIL_MALLOC_PRIVATE

#define UTIL_MALLOC_PRIVATE

Definition at line 18 of file malloc.c.

Function Documentation

size_mul_check()

STATIC int size_mul_check	(	const size_t	x,
		const size_t	y
	)

Return non-zero if and only if the product of the arguments is exact, and cannot overflow.

Definition at line 86 of file malloc.c.

tor_calloc_()

void * tor_calloc_	(	size_t	nmemb,
		size_t	size
	)

Allocate a chunk of nmemb*size bytes of memory, fill the memory with zero bytes, and return a pointer to the result. Log and terminate the process on error. (Same as calloc(nmemb,size), but never returns NULL.) The second argument (size) should preferably be non-zero and a compile-time constant.

Definition at line 107 of file malloc.c.

tor_free_()

void tor_free_

(

void *

mem

)

Helper for places that need to take a function pointer to the right spelling of "free()".

Definition at line 227 of file malloc.c.

Referenced by free_execve_args(), smartlist_uniq_digests(), smartlist_uniq_digests256(), smartlist_uniq_strings(), sort_version_list(), tor_run_main(), and tor_str_wipe_and_free_().

tor_malloc_()

void * tor_malloc_

(

size_t

size

)

Allocate a chunk of size bytes of memory, and return a pointer to result. On error, log and terminate the process. (Same as malloc(size), but never returns NULL.)

Definition at line 32 of file malloc.c.

Referenced by tor_malloc_zero_(), and tor_run_main().

tor_malloc_zero_()

void * tor_malloc_zero_

(

size_t

size

)

Allocate a chunk of size bytes of memory, fill the memory with zero bytes, and return a pointer to the result. Log and terminate the process on error. (Same as calloc(size,1), but never returns NULL.)

Definition at line 63 of file malloc.c.

tor_memdup_()

void * tor_memdup_	(	const void *	mem,
		size_t	len
	)

Allocate a chunk of len bytes, with the same contents as the len bytes starting at mem.

Definition at line 200 of file malloc.c.

tor_memdup_nulterm_()

void * tor_memdup_nulterm_	(	const void *	mem,
		size_t	len
	)

As tor_memdup(), but add an extra 0 byte at the end of the resulting memory.

Definition at line 213 of file malloc.c.

tor_realloc_()

void * tor_realloc_	(	void *	ptr,
		size_t	size
	)

Change the size of the memory block pointed to by ptr to size bytes long; return the new memory block. On error, log and terminate. (Like realloc(ptr,size), but never returns NULL.)

Definition at line 118 of file malloc.c.

Referenced by tor_run_main().

tor_reallocarray_()

void * tor_reallocarray_	(	void *	ptr,
		size_t	sz1,
		size_t	sz2
	)

Try to realloc ptr so that it takes up sz1 * sz2 bytes. Check for overflow. Unlike other allocation functions, return NULL on overflow.

Definition at line 146 of file malloc.c.

tor_strdup_()

char * tor_strdup_

(

const char *

s

)

Return a newly allocated copy of the NUL-terminated string s. On error, log and terminate. (Like strdup(s), but never returns NULL.)

Definition at line 160 of file malloc.c.

tor_strndup_()

char * tor_strndup_	(	const char *	s,
		size_t	n
	)

Allocate and return a new string containing the first n characters of s. If s is longer than n characters, only the first n are copied. The result is always NUL-terminated. (Like strndup(s,n), but never returns NULL.)

Definition at line 182 of file malloc.c.