blob: 05f9f259b783e7892c3a7a1d3791d6b767bb9bed [file] [log] [blame]
* Author: Simon McVittie <>
* Copyright © 2011 Nokia Corporation
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
* See the included COPYING file for more information.
#include <glib.h>
/* On smcv's laptop, 1e4 iterations didn't always exhibit the bug, but 1e5
* iterations exhibited it 10/10 times in practice. YMMV. */
#define ITERATIONS 100000
static GStaticPrivate sp;
static GMutex *mutex;
static GCond *cond;
static guint i;
static volatile gint freed = 0;
static void
notify (gpointer p)
if (!g_atomic_int_compare_and_exchange (&freed, 0, 1))
g_error ("someone already freed it after %u iterations", i);
static gpointer thread_func (gpointer nil)
/* wait for main thread to reach its g_cond_wait call */
g_mutex_lock (mutex);
g_static_private_set (&sp, &sp, notify);
g_cond_broadcast (cond);
g_mutex_unlock (mutex);
return nil;
static void
testcase (void)
g_test_bug ("642026");
mutex = g_mutex_new ();
cond = g_cond_new ();
g_mutex_lock (mutex);
for (i = 0; i < ITERATIONS; i++)
GThread *t1;
g_static_private_init (&sp);
freed = 0;
t1 = g_thread_create (thread_func, NULL, TRUE, NULL);
/* wait for t1 to set up its thread-private data */
g_cond_wait (cond, mutex);
/* exercise the bug, by racing with t1 to free the private data */
g_static_private_free (&sp);
g_thread_join (t1);
g_cond_free (cond);
g_mutex_unlock (mutex);
g_mutex_free (mutex);
main (int argc,
char **argv)
g_test_init (&argc, &argv, NULL);
g_test_bug_base ("");
g_test_add_func ("/glib/642026", testcase);
return g_test_run ();