mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/* Test case for hand function calls in multi-threaded program.
|
|
|
|
Copyright 2008-2020 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef NR_THREADS
|
|
#define NR_THREADS 4
|
|
#endif
|
|
|
|
int thread_count;
|
|
|
|
pthread_mutex_t thread_count_mutex;
|
|
|
|
pthread_cond_t thread_count_condvar;
|
|
|
|
void
|
|
incr_thread_count (void)
|
|
{
|
|
pthread_mutex_lock (&thread_count_mutex);
|
|
++thread_count;
|
|
if (thread_count == NR_THREADS)
|
|
pthread_cond_signal (&thread_count_condvar);
|
|
pthread_mutex_unlock (&thread_count_mutex);
|
|
}
|
|
|
|
void
|
|
cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut)
|
|
{
|
|
pthread_mutex_lock (mut);
|
|
pthread_cond_wait (cond, mut);
|
|
pthread_mutex_unlock (mut);
|
|
}
|
|
|
|
void
|
|
noreturn (void)
|
|
{
|
|
pthread_mutex_t mut;
|
|
pthread_cond_t cond;
|
|
|
|
pthread_mutex_init (&mut, NULL);
|
|
pthread_cond_init (&cond, NULL);
|
|
|
|
/* Wait for a condition that will never be signaled, so we effectively
|
|
block the thread here. */
|
|
cond_wait (&cond, &mut);
|
|
}
|
|
|
|
void *
|
|
forever_pthread (void *unused)
|
|
{
|
|
incr_thread_count ();
|
|
noreturn ();
|
|
}
|
|
|
|
void
|
|
hand_call (void)
|
|
{
|
|
}
|
|
|
|
/* Wait until all threads are running. */
|
|
|
|
void
|
|
wait_all_threads_running (void)
|
|
{
|
|
pthread_mutex_lock (&thread_count_mutex);
|
|
if (thread_count == NR_THREADS)
|
|
{
|
|
pthread_mutex_unlock (&thread_count_mutex);
|
|
return;
|
|
}
|
|
pthread_cond_wait (&thread_count_condvar, &thread_count_mutex);
|
|
if (thread_count == NR_THREADS)
|
|
{
|
|
pthread_mutex_unlock (&thread_count_mutex);
|
|
return;
|
|
}
|
|
pthread_mutex_unlock (&thread_count_mutex);
|
|
printf ("failed waiting for all threads to start\n");
|
|
abort ();
|
|
}
|
|
|
|
/* Called when all threads are running.
|
|
Easy place for a breakpoint. */
|
|
|
|
void
|
|
all_threads_running (void)
|
|
{
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
pthread_t forever[NR_THREADS];
|
|
int i;
|
|
|
|
pthread_mutex_init (&thread_count_mutex, NULL);
|
|
pthread_cond_init (&thread_count_condvar, NULL);
|
|
|
|
for (i = 0; i < NR_THREADS; ++i)
|
|
pthread_create (&forever[i], NULL, forever_pthread, NULL);
|
|
|
|
wait_all_threads_running ();
|
|
all_threads_running ();
|
|
|
|
return 0;
|
|
}
|
|
|