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/* Test that malloc tcache catches double free.
Copyright (C) 2018-2025 Free Software Foundation, Inc.
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; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <error.h>
#include <limits.h>
#include <malloc.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/signal.h>
static int
do_test (void)
{
#define COUNT 20
char * volatile ptrs[COUNT];
int i;
/* Allocate enough small chunks so that when we free them all, the tcache
is full, and the first one we freed is at the end of its linked list. */
for (i = 0; i < COUNT; i++)
ptrs[i] = malloc (20);
for (i = 0; i < COUNT; i++)
free (ptrs[i]);
free (ptrs[0]);
printf("FAIL: tcache double free\n");
return 1;
}
#define TEST_FUNCTION do_test
#define EXPECTED_SIGNAL SIGABRT
#include <support/test-driver.c>
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