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80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* Copyright (C) 2008-2025 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 <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ucontext.h>
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#include <tst-stack-align.h>
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ucontext_t ucp, ucp2;
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char st1[262144] __attribute__((aligned (16)));
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void
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cf (int i, int j)
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{
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if (i != 78 || j != 274)
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{
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printf ("i %d j %d\n", i, j);
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exit (1);
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}
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else if (TEST_STACK_ALIGN ())
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{
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puts ("insufficiently aligned stack");
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exit (2);
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}
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}
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int
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do_test (void)
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{
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for (size_t j = 32; j < 64; j += sizeof (long))
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{
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if (getcontext (&ucp) != 0)
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{
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if (errno == ENOSYS)
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{
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puts ("context handling not supported");
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return 0;
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}
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puts ("getcontext failed");
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return 1;
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}
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ucp.uc_link = &ucp2;
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ucp.uc_stack.ss_sp = st1;
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ucp.uc_stack.ss_size = sizeof (st1) - j;
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memset (&st1[sizeof (st1) - j], 0x55, j);
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makecontext (&ucp, (void (*) (void)) cf, 2, 78, 274);
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if (swapcontext (&ucp2, &ucp) != 0)
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{
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puts ("swapcontext failed");
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return 1;
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}
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for (size_t i = j; i > 0; i--)
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if (st1[sizeof (st1) - j + i - 1] != 0x55)
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{ printf ("fail %zd %zd\n", i, j); break; }
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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