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 | #define COUNT 20 |
31 | char * volatile ptrs[COUNT]; |
32 | int i; |
33 | |
34 | /* Allocate enough small chunks so that when we free them all, the tcache |
35 | is full, and the first one we freed is at the end of its linked list. */ |
36 | for (i = 0; i < COUNT; i++) |
37 | ptrs[i] = malloc (size: 20); |
38 | for (i = 0; i < COUNT; i++) |
39 | free (ptr: ptrs[i]); |
40 | free (ptr: ptrs[0]); |
41 | |
42 | printf(format: "FAIL: tcache double free\n" ); |
43 | return 1; |
44 | } |
45 | |
46 | #define TEST_FUNCTION do_test |
47 | #define EXPECTED_SIGNAL SIGABRT |
48 | #include <support/test-driver.c> |
49 | |