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/* This testcase is part of GDB, the GNU debugger.
Copyright 2022-2025 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 <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#define NUM 4
static pthread_barrier_t threads_started_barrier;
static void
stop_here ()
{
}
static void
spin ()
{
while (1)
usleep (1);
}
static void *
work (void *arg)
{
int id = *(int *) arg;
pthread_barrier_wait (&threads_started_barrier);
if (id % 2 == 0)
stop_here ();
else
spin ();
pthread_exit (NULL);
}
int
main ()
{
/* Ensure we stop if GDB crashes and DejaGNU fails to kill us. */
alarm (10);
pthread_t threads[NUM];
int ids[NUM];
pthread_barrier_init (&threads_started_barrier, NULL, NUM + 1);
for (int i = 0; i < NUM; i++)
{
ids[i] = i;
pthread_create (&threads[i], NULL, work, &ids[i]);
}
/* Wait until all threads are seen running. */
pthread_barrier_wait (&threads_started_barrier);
stop_here ();
return 0;
}
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