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/* This testcase is part of GDB, the GNU debugger.
Copyright 2016-2021 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
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 <pthread.h>
#include <unistd.h>
#define NUM_THREADS 2
static pthread_barrier_t barrier;
static void
child_sub_function (void)
{
/* Deliberately spin on a variable instead of plain 'while (1)' to
avoid the Clang bug https://bugs.llvm.org/show_bug.cgi?id=49614. */
int spin = 1;
while (spin); /* thread loop line */
}
static void *
child_function (void *args)
{
pthread_barrier_wait (&barrier);
child_sub_function (); /* thread caller line */
return NULL;
}
int
main (void)
{
int i = 0;
pthread_t threads[NUM_THREADS];
/* Make the test exit eventually. */
alarm (20);
/* Initialize the barrier, NUM_THREADS plus the main thread. */
pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
for (i = 0; i < NUM_THREADS; i++)
pthread_create (&threads[i], NULL, child_function, NULL);
pthread_barrier_wait (&barrier);
/* Deliberately spin on a variable instead of plain 'while (1)' to
avoid the Clang bug https://bugs.llvm.org/show_bug.cgi?id=49614. */
int spin = 1;
while (spin); /* main break line */
return 0;
}
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