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/* Copyright 2023 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <dlfcn.h>
#include <pthread.h>
#include <stdlib.h>
pthread_barrier_t barrier;
static void
barrier_wait (pthread_barrier_t *b)
{
int res = pthread_barrier_wait (b);
if (res != 0 && res != PTHREAD_BARRIER_SERIAL_THREAD)
abort ();
}
static void *
thread_worker (void *arg)
{
barrier_wait (&barrier);
return NULL;
}
void
breakpt (void)
{
/* Nothing. */
}
int
main (void)
{
void *handle;
void (*func)(int);
pthread_t thread;
if (pthread_barrier_init (&barrier, NULL, 2) != 0)
abort ();
if (pthread_create (&thread, NULL, thread_worker, NULL) != 0)
abort ();
breakpt ();
/* Allow the worker thread to complete. */
barrier_wait (&barrier);
if (pthread_join (thread, NULL) != 0)
abort ();
breakpt ();
/* Now load the shared library. */
handle = dlopen (SHLIB_NAME, RTLD_LAZY);
if (handle == NULL)
abort ();
/* Find the function symbol. */
func = (void (*)(int)) dlsym (handle, "foo");
/* Call the library function. */
func (1);
/* Unload the shared library. */
if (dlclose (handle) != 0)
abort ();
breakpt ();
return 0;
}
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