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glibc/malloc/tst-calloc.c
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/* Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <error.h> | |
#include <limits.h> | |
#include <malloc.h> | |
#include <stdlib.h> | |
#include <stdio.h> | |
/* Number of samples per size. */ | |
#define N 50000 | |
static void | |
fixed_test (int size) | |
{ | |
char *ptrs[N]; | |
int i; | |
for (i = 0; i < N; ++i) | |
{ | |
int j; | |
ptrs[i] = (char *) calloc (1, size); | |
if (ptrs[i] == NULL) | |
break; | |
for (j = 0; j < size; ++j) | |
{ | |
if (ptrs[i][j] != '\0') | |
error (EXIT_FAILURE, 0, | |
"byte not cleared (size %d, element %d, byte %d)", | |
size, i, j); | |
ptrs[i][j] = '\xff'; | |
} | |
} | |
while (i-- > 0) | |
free (ptrs[i]); | |
} | |
static void | |
random_test (void) | |
{ | |
char *ptrs[N]; | |
int i; | |
for (i = 0; i < N; ++i) | |
{ | |
int j; | |
int n = 1 + random () % 10; | |
int elem = 1 + random () % 100; | |
int size = n * elem; | |
ptrs[i] = (char *) calloc (n, elem); | |
if (ptrs[i] == NULL) | |
break; | |
for (j = 0; j < size; ++j) | |
{ | |
if (ptrs[i][j] != '\0') | |
error (EXIT_FAILURE, 0, | |
"byte not cleared (size %d, element %d, byte %d)", | |
size, i, j); | |
ptrs[i][j] = '\xff'; | |
} | |
} | |
while (i-- > 0) | |
free (ptrs[i]); | |
} | |
static void | |
null_test (void) | |
{ | |
/* If the size is 0 the result is implementation defined. Just make | |
sure the program doesn't crash. */ | |
calloc (0, 0); | |
calloc (0, UINT_MAX); | |
calloc (UINT_MAX, 0); | |
calloc (0, ~((size_t) 0)); | |
calloc (~((size_t) 0), 0); | |
} | |
static int | |
do_test (void) | |
{ | |
/* We are allocating blocks with `calloc' and check whether every | |
block is completely cleared. We first try this for some fixed | |
times and then with random size. */ | |
fixed_test (15); | |
fixed_test (5); | |
fixed_test (17); | |
fixed_test (6); | |
fixed_test (31); | |
fixed_test (96); | |
random_test (); | |
null_test (); | |
return 0; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |