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fff94fa2 | 1 | /* Verify that backtrace does not deadlock on itself on memory corruption. |
04277e02 | 2 | Copyright (C) 2015-2019 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 | ||
c23de0aa | 19 | #include <signal.h> |
fff94fa2 SP |
20 | #include <stdlib.h> |
21 | ||
c23de0aa FW |
22 | #include <support/support.h> |
23 | ||
fff94fa2 SP |
24 | #define SIZE 4096 |
25 | ||
26 | /* Wrap free with a function to prevent gcc from optimizing it out. */ | |
27 | static void | |
28 | __attribute__((noinline)) | |
29 | call_free (void *ptr) | |
30 | { | |
31 | free (ptr); | |
32 | *(size_t *)(ptr - sizeof (size_t)) = 1; | |
33 | } | |
34 | ||
35 | int | |
36 | do_test (void) | |
37 | { | |
38 | void *ptr1 = malloc (SIZE); | |
39 | void *ptr2 = malloc (SIZE); | |
40 | ||
02242448 TMQMF |
41 | /* Avoid unwanted output to TTY after an expected memory corruption. */ |
42 | ignore_stderr(); | |
43 | ||
fff94fa2 SP |
44 | call_free (ptr1); |
45 | ptr1 = malloc (SIZE); | |
46 | ||
47 | /* Not reached. The return statement is to put ptr2 into use so that gcc | |
48 | doesn't optimize out that malloc call. */ | |
49 | return (ptr1 == ptr2); | |
50 | } | |
c23de0aa FW |
51 | |
52 | #define EXPECTED_SIGNAL SIGABRT | |
53 | #include <support/test-driver.c> |