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