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/* Test unwinding through main.
Copyright (C) 2018-2025 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 <unwind.h>
#include <unistd.h>
#include <support/test-driver.h>
#if USE_PTHREADS
# include <pthread.h>
# include <error.h>
#endif
static _Unwind_Reason_Code
callback (struct _Unwind_Context *ctx, void *arg)
{
return _URC_NO_REASON;
}
static void *
func (void *a)
{
/* Arrange for this test to be killed if _Unwind_Backtrace runs into an
endless loop. We cannot use the test driver because the complete
call chain needs to be compiled with -funwind-tables so that
_Unwind_Backtrace is able to reach the start routine. */
alarm (DEFAULT_TIMEOUT);
_Unwind_Backtrace (callback, 0);
return a;
}
int
main (void)
{
#if USE_PTHREADS
pthread_t thr;
int rc = pthread_create (&thr, NULL, &func, NULL);
if (rc)
error (1, rc, "pthread_create");
rc = pthread_join (thr, NULL);
if (rc)
error (1, rc, "pthread_join");
#else
func (NULL);
#endif
}
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