1/* Verify that the clone child stack is properly aligned.
2 Copyright (C) 2021-2024 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
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 <https://www.gnu.org/licenses/>. */
18
19#include <sched.h>
20#include <stdbool.h>
21#include <stdint.h>
22#include <stdio.h>
23#include <string.h>
24#include <sys/wait.h>
25#include <unistd.h>
26#include <tst-stack-align.h>
27#include <clone_internal.h>
28#include <support/xunistd.h>
29#include <support/check.h>
30
31static int
32f (void *arg)
33{
34 puts (s: "in f");
35
36 return TEST_STACK_ALIGN () ? 1 : 0;
37}
38
39static int
40do_test (void)
41{
42 puts (s: "in main");
43
44 if (TEST_STACK_ALIGN ())
45 FAIL_EXIT1 ("stack alignment failed");
46
47#define STACK_SIZE 128 * 1024
48 char st[STACK_SIZE] __attribute__ ((aligned));
49 struct clone_args clone_args =
50 {
51 .stack = (uintptr_t) st,
52 .stack_size = sizeof (st),
53 };
54 pid_t p = __clone_internal (&clone_args, f, 0);
55 TEST_VERIFY (p != -1);
56
57 int e;
58 xwaitpid (p, status: &e, __WCLONE);
59 TEST_VERIFY (WIFEXITED (e));
60 TEST_COMPARE (WEXITSTATUS (e), 0);
61 return 0;
62}
63
64#include <support/test-driver.c>
65

source code of glibc/sysdeps/unix/sysv/linux/tst-align-clone-internal.c