/* Test that malloc tcache catches double free.

   Copyright (C) 2018 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

   <http://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)

{

  char * volatile ptrs[20];

  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.  */

#define COUNT 20

  for (i=0; i

    ptrs[i] = malloc (20);

  for (i=0; 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>