89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
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/* Check multiple setcontext calls.
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Copyright (C) 2018-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <ucontext.h>
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#include <unistd.h>
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static ucontext_t ctx[2];
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static volatile int done;
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static void f2 (void);
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static void
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__attribute__ ((noinline, noclone))
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f1 (void)
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{
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printf ("start f1\n");
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f2 ();
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}
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static void
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__attribute__ ((noinline, noclone))
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f2 (void)
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{
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printf ("start f2\n");
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if (setcontext (&ctx[1]) != 0)
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{
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printf ("%s: setcontext: %m\n", __FUNCTION__);
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exit (EXIT_FAILURE);
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}
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}
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static void
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f3 (void)
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{
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printf ("start f3\n");
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if (done)
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exit (EXIT_SUCCESS);
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done = 1;
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if (setcontext (&ctx[0]) != 0)
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{
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printf ("%s: setcontext: %m\n", __FUNCTION__);
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exit (EXIT_FAILURE);
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}
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}
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static int
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do_test (void)
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{
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char st1[32768];
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puts ("making contexts");
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if (getcontext (&ctx[0]) != 0)
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{
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printf ("%s: getcontext: %m\n", __FUNCTION__);
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exit (EXIT_FAILURE);
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}
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if (getcontext (&ctx[1]) != 0)
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{
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printf ("%s: getcontext: %m\n", __FUNCTION__);
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exit (EXIT_FAILURE);
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}
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ctx[1].uc_stack.ss_sp = st1;
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ctx[1].uc_stack.ss_size = sizeof st1;
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ctx[1].uc_link = &ctx[0];
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makecontext (&ctx[1], (void (*) (void)) f3, 0);
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f1 ();
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puts ("FAIL: returned from f1 ()");
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exit (EXIT_FAILURE);
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}
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#include <support/test-driver.c>
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