mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 05:50:14 +00:00
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* Check setcontext on the context from makecontext.
|
|
Copyright (C) 2018-2024 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <ucontext.h>
|
|
#include <unistd.h>
|
|
#include <stdatomic.h>
|
|
|
|
static ucontext_t ctx[5];
|
|
static atomic_int done;
|
|
|
|
static void
|
|
f1 (void)
|
|
{
|
|
puts ("start f1");
|
|
if (!done)
|
|
{
|
|
if (getcontext (&ctx[2]) != 0)
|
|
{
|
|
printf ("%s: getcontext: %m\n", __FUNCTION__);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
if (done)
|
|
{
|
|
puts ("set context in f1");
|
|
if (setcontext (&ctx[3]) != 0)
|
|
{
|
|
printf ("%s: setcontext: %m\n", __FUNCTION__);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
done++;
|
|
puts ("swap contexts in f1");
|
|
if (swapcontext (&ctx[4], &ctx[2]) != 0)
|
|
{
|
|
printf ("%s: setcontext: %m\n", __FUNCTION__);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
puts ("end f1");
|
|
exit (done == 2 ? EXIT_SUCCESS : 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)) f1, 0);
|
|
puts ("swap contexts");
|
|
if (swapcontext (&ctx[3], &ctx[1]) != 0)
|
|
{
|
|
printf ("%s: setcontext: %m\n", __FUNCTION__);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
if (done != 1)
|
|
exit (EXIT_FAILURE);
|
|
done++;
|
|
puts ("set context");
|
|
if (setcontext (&ctx[4]) != 0)
|
|
{
|
|
printf ("%s: setcontext: %m\n", __FUNCTION__);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
#include <support/test-driver.c>
|