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
27static int
28do_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

source code of glibc/malloc/tst-pvalloc-fortify.c