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/* Verify that the clone wrapper properly aligns the child stack.
Copyright (C) 2021-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sched.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <libc-pointer-arith.h>
#include <tst-stack-align.h>
#include <stackinfo.h>
#include <support/xunistd.h>
#include <support/check.h>
static int
check_stack_alignment (void *arg)
{
bool ok = true;
puts ("in f");
if (TEST_STACK_ALIGN ())
ok = false;
return ok ? 0 : 1;
}
static int
do_test (void)
{
puts ("in do_test");
if (TEST_STACK_ALIGN ())
FAIL_EXIT1 ("stack isn't aligned\n");
#ifdef __ia64__
# define STACK_SIZE (256 * 1024)
#else
# define STACK_SIZE (128 * 1024)
#endif
char st[STACK_SIZE + 1];
/* NB: Align child stack to 1 byte. */
char *stack = PTR_ALIGN_UP (&st[0], 2) + 1;
#ifdef __ia64__
extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base,
size_t __child_stack_size, int __flags,
void *__arg, ...);
pid_t p = __clone2 (check_stack_alignment, stack, STACK_SIZE, 0, 0);
#else
# if _STACK_GROWS_DOWN
pid_t p = clone (check_stack_alignment, stack + STACK_SIZE, 0, 0);
# elif _STACK_GROWS_UP
pid_t p = clone (check_stack_alignment, stack, 0, 0);
# else
# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
# endif
#endif
/* Clone must not fail. */
TEST_VERIFY_EXIT (p != -1);
int e;
xwaitpid (p, &e, __WCLONE);
if (!WIFEXITED (e))
{
if (WIFSIGNALED (e))
printf ("died from signal %s\n", strsignal (WTERMSIG (e)));
FAIL_EXIT1 ("process did not terminate correctly");
}
if (WEXITSTATUS (e) != 0)
FAIL_EXIT1 ("exit code %d", WEXITSTATUS (e));
return 0;
}
#include <support/test-driver.c>
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