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fff94fa2 | 1 | /* Verify that backtrace does not deadlock on itself on memory corruption. |
f7a9f785 | 2 | Copyright (C) 2015-2016 Free Software Foundation, Inc. |
fff94fa2 SP |
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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | ||
20 | #include <stdlib.h> | |
21 | ||
22 | #define SIZE 4096 | |
23 | ||
24 | /* Wrap free with a function to prevent gcc from optimizing it out. */ | |
25 | static void | |
26 | __attribute__((noinline)) | |
27 | call_free (void *ptr) | |
28 | { | |
29 | free (ptr); | |
30 | *(size_t *)(ptr - sizeof (size_t)) = 1; | |
31 | } | |
32 | ||
02242448 TMQMF |
33 | int do_test (void); |
34 | ||
35 | #define TEST_FUNCTION do_test () | |
36 | #define EXPECTED_SIGNAL SIGABRT | |
37 | ||
38 | #include "../test-skeleton.c" | |
39 | ||
fff94fa2 SP |
40 | int |
41 | do_test (void) | |
42 | { | |
43 | void *ptr1 = malloc (SIZE); | |
44 | void *ptr2 = malloc (SIZE); | |
45 | ||
02242448 TMQMF |
46 | /* Avoid unwanted output to TTY after an expected memory corruption. */ |
47 | ignore_stderr(); | |
48 | ||
fff94fa2 SP |
49 | call_free (ptr1); |
50 | ptr1 = malloc (SIZE); | |
51 | ||
52 | /* Not reached. The return statement is to put ptr2 into use so that gcc | |
53 | doesn't optimize out that malloc call. */ | |
54 | return (ptr1 == ptr2); | |
55 | } |