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768c83b7 | 1 | /* Test fortify-source allocation size handling in pvalloc (bug 25401). |
6d7e8eda | 2 | Copyright (C) 2020-2023 Free Software Foundation, Inc. |
768c83b7 FW |
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 (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> |