malloc/tst-tcfree1.c

   1 /* Test that malloc tcache catches double free.
   2    Copyright (C) 2018-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <error.h>
  21 #include <limits.h>
  22 #include <malloc.h>
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <sys/signal.h>
  26
  27 static int
  28 do_test (void)
  29 {
  30   /* Do one allocation of any size that fits in tcache.  */
  31   char * volatile x = malloc (32);
  32
  33   free (x); // puts in tcache
  34   free (x); // should abort
  35
  36   printf("FAIL: tcache double free not detected\n");
  37   return 1;
  38 }
  39
  40 #define TEST_FUNCTION do_test
  41 #define EXPECTED_SIGNAL SIGABRT
  42 #include <support/test-driver.c>