Race condition

[dimas3452]

interbench/interbench.c

Lines 733 to 738 in e612a65

	while (1) {
	wait_sem(&s->start);
	post_sem(&ringthreads[post_to].sem.start);
	if (!trywait_sem(&s->stop))
	goto out;
	}

A race condition is possible for ring load. Suppose that there are two ring threads '0' and '1'. Consider the following case:

• '0' thread has executed the final post_sem(&ringthreads[post_to].sem.start); and finished.
• '1' thread has received the final start, but it hasn't received stop yet, and '0' thread has already finished, so '1' thread hangs in wait_sem(&s->start); forever.