1 | /* Test fortify-source allocation size handling in pvalloc (bug 25401). |
2 | Copyright (C) 2020-2022 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 License as |
7 | published by the Free Software Foundation; either version 2.1 of the |
8 | 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; see the file COPYING.LIB. If |
17 | not, see <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #undef _FORTIFY_SOURCE |
20 | #define _FORTIFY_SOURCE 2 |
21 | #include <malloc.h> |
22 | #include <string.h> |
23 | #include <support/check.h> |
24 | #include <support/xunistd.h> |
25 | #include <unistd.h> |
26 | |
27 | static int |
28 | do_test (void) |
29 | { |
30 | /* The test below assumes that pvalloc rounds up the allocation size |
31 | to at least 8. */ |
32 | TEST_VERIFY (xsysconf (_SC_PAGESIZE) >= 8); |
33 | |
34 | void *p = pvalloc (size: 5); |
35 | TEST_VERIFY_EXIT (p != NULL); |
36 | |
37 | /* This is valid assuming the page size is at least 8 because |
38 | pvalloc rounds up the allocation size to a multiple of the page |
39 | size. Due to bug 25041, this used to trigger a compiler |
40 | warning. */ |
41 | strcpy (p, "abcdefg" ); |
42 | |
43 | asm ("" : : "g" (p) : "memory" ); /* Optimization barrier. */ |
44 | TEST_VERIFY (malloc_usable_size (p) >= xsysconf (_SC_PAGESIZE)); |
45 | return 0; |
46 | } |
47 | |
48 | #include <support/test-driver.c> |
49 | |