1 /* Verify that the clone wrapper properly aligns the child stack.
2 Copyright (C) 2021-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
26 #include <libc-pointer-arith.h>
27 #include <tst-stack-align.h>
28 #include <stackinfo.h>
29 #include <support/xunistd.h>
30 #include <support/check.h>
33 check_stack_alignment (void *arg
)
39 if (TEST_STACK_ALIGN ())
50 if (TEST_STACK_ALIGN ())
51 FAIL_EXIT1 ("stack isn't aligned\n");
54 # define STACK_SIZE (256 * 1024)
56 # define STACK_SIZE (128 * 1024)
59 char st
[STACK_SIZE
+ 1];
60 /* NB: Align child stack to 1 byte. */
61 char *stack
= PTR_ALIGN_UP (&st
[0], 2) + 1;
64 extern int __clone2 (int (*__fn
) (void *__arg
), void *__child_stack_base
,
65 size_t __child_stack_size
, int __flags
,
67 pid_t p
= __clone2 (check_stack_alignment
, stack
, STACK_SIZE
, 0, 0);
69 # if _STACK_GROWS_DOWN
70 pid_t p
= clone (check_stack_alignment
, stack
+ STACK_SIZE
, 0, 0);
71 # elif _STACK_GROWS_UP
72 pid_t p
= clone (check_stack_alignment
, stack
, 0, 0);
74 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
78 /* Clone must not fail. */
79 TEST_VERIFY_EXIT (p
!= -1);
82 xwaitpid (p
, &e
, __WCLONE
);
86 printf ("died from signal %s\n", strsignal (WTERMSIG (e
)));
87 FAIL_EXIT1 ("process did not terminate correctly");
90 if (WEXITSTATUS (e
) != 0)
91 FAIL_EXIT1 ("exit code %d", WEXITSTATUS (e
));
96 #include <support/test-driver.c>