1/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <sched.h>
19#include <stdbool.h>
20#include <stdint.h>
21#include <stdio.h>
22#include <string.h>
23#include <sys/wait.h>
24#include <unistd.h>
25#include <tst-stack-align.h>
26#include <stackinfo.h>
27
28static int
29f (void *arg)
30{
31 bool ok = true;
32
33 puts (s: "in f");
34
35 if (TEST_STACK_ALIGN ())
36 ok = false;
37
38 return ok ? 0 : 1;
39}
40
41static int
42do_test (void)
43{
44 bool ok = true;
45
46 puts (s: "in main");
47
48 if (TEST_STACK_ALIGN ())
49 ok = false;
50
51#ifdef __ia64__
52 extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base,
53 size_t __child_stack_size, int __flags,
54 void *__arg, ...);
55 char st[256 * 1024];
56 pid_t p = __clone2 (f, st, sizeof (st), 0, 0);
57#else
58 char st[128 * 1024] __attribute__ ((aligned));
59# if _STACK_GROWS_DOWN
60 pid_t p = clone (fn: f, child_stack: st + sizeof (st), flags: 0, arg: 0);
61# elif _STACK_GROWS_UP
62 pid_t p = clone (f, st, 0, 0);
63# else
64# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
65# endif
66#endif
67 if (p == -1)
68 {
69 printf(format: "clone failed: %m\n");
70 return 1;
71 }
72
73 int e;
74 if (waitpid (pid: p, stat_loc: &e, __WCLONE) != p)
75 {
76 puts (s: "waitpid failed");
77 kill (pid: p, SIGKILL);
78 return 1;
79 }
80 if (!WIFEXITED (e))
81 {
82 if (WIFSIGNALED (e))
83 printf (format: "died from signal %s\n", strsignal (WTERMSIG (e)));
84 else
85 puts (s: "did not terminate correctly");
86 return 1;
87 }
88 if (WEXITSTATUS (e) != 0)
89 ok = false;
90
91 return ok ? 0 : 1;
92}
93
94#define TEST_FUNCTION do_test ()
95#include "../test-skeleton.c"
96

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