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/* Check multiple setcontext calls.
Copyright (C) 2018-2023 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 <stdio.h>
#include <stdlib.h>
#include <ucontext.h>
#include <unistd.h>
static ucontext_t ctx[2];
static volatile int done;
static void f2 (void);
static void
__attribute__ ((noinline, noclone))
f1 (void)
{
printf ("start f1\n");
f2 ();
}
static void
__attribute__ ((noinline, noclone))
f2 (void)
{
printf ("start f2\n");
if (setcontext (&ctx[1]) != 0)
{
printf ("%s: setcontext: %m\n", __FUNCTION__);
exit (EXIT_FAILURE);
}
}
static void
f3 (void)
{
printf ("start f3\n");
if (done)
exit (EXIT_SUCCESS);
done = 1;
if (setcontext (&ctx[0]) != 0)
{
printf ("%s: setcontext: %m\n", __FUNCTION__);
exit (EXIT_FAILURE);
}
}
static int
do_test (void)
{
char st1[32768];
puts ("making contexts");
if (getcontext (&ctx[0]) != 0)
{
printf ("%s: getcontext: %m\n", __FUNCTION__);
exit (EXIT_FAILURE);
}
if (getcontext (&ctx[1]) != 0)
{
printf ("%s: getcontext: %m\n", __FUNCTION__);
exit (EXIT_FAILURE);
}
ctx[1].uc_stack.ss_sp = st1;
ctx[1].uc_stack.ss_size = sizeof st1;
ctx[1].uc_link = &ctx[0];
makecontext (&ctx[1], (void (*) (void)) f3, 0);
f1 ();
puts ("FAIL: returned from f1 ()");
exit (EXIT_FAILURE);
}
#include <support/test-driver.c>
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