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/* Module used for improved aligned_alloc testing.
Copyright (C) 2024 Free Software Foundation, Inc.
Copyright The GNU Toolchain Authors.
This file is part of the GNU C Library.
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; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#include <libc-symbols.h>
#include <stdlib.h>
#include <time.h>
extern void *__libc_malloc (size_t size);
extern void *__libc_calloc (size_t n, size_t size);
__thread unsigned int seed = 0;
int aligned_alloc_count = 0;
int libc_malloc_count = 0;
int libc_calloc_count = 0;
static void *
get_random_alloc (size_t size)
{
void *retval;
size_t align;
struct timespec tp;
if (seed == 0)
{
clock_gettime (CLOCK_REALTIME, &tp);
seed = tp.tv_nsec;
}
switch (rand_r (&seed) % 3)
{
case 1:
/* Get a random alignment value. Biased towards the smaller
* values up to 16384. Must be a power of 2. */
align = 1 << rand_r (&seed) % 15;
retval = aligned_alloc (align, size);
aligned_alloc_count++;
break;
case 2:
retval = __libc_calloc (1, size);
libc_calloc_count++;
break;
default:
retval = __libc_malloc (size);
libc_malloc_count++;
break;
}
return retval;
}
void *
__random_malloc (size_t size)
{
return get_random_alloc (size);
}
strong_alias (__random_malloc, malloc)
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