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/* This testcase is part of GDB, the GNU debugger.
Copyright 2015-2021 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
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 <>. */
#define _GNU_SOURCE
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#include <assert.h>
#define NUM_THREADS 3
struct thread_data
const char *name;
pthread_barrier_t *barrier;
static void *
thread_func (void *varg)
struct thread_data *arg = (struct thread_data *) varg;
int res;
res = pthread_setname_np (pthread_self (), arg->name);
assert (res == 0);
pthread_barrier_wait (arg->barrier);
pthread_barrier_wait (arg->barrier);
return NULL;
static void
all_threads_ready (void)
main (int argc, char **argv)
pthread_t threads[NUM_THREADS];
struct thread_data args[NUM_THREADS];
pthread_barrier_t barrier;
int i, res;
const char *names[] = { "carrot", "potato", "celery" };
alarm (20);
/* Make sure that NAMES contains NUM_THREADS elements. */
assert (sizeof (names) / sizeof (names[0]) == NUM_THREADS);
res = pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
assert (res == 0);;
res = pthread_setname_np (pthread_self (), "main");
assert (res == 0);
for (i = 0; i < NUM_THREADS; i++)
struct thread_data *arg = &args[i];
arg->name = names[i];
arg->barrier = &barrier;
res = pthread_create (&threads[i], NULL, thread_func, arg);
assert (res == 0);
pthread_barrier_wait (&barrier);
all_threads_ready ();
pthread_barrier_wait (&barrier);
for (i = 0; i < NUM_THREADS; i++)
res = pthread_join (threads[i], NULL);
assert (res == 0);
return 0;