An improper locking bug(e.g., deadlock) on the lock &mutex

[ycaibb]

Hi, developers, thank you for your checking. It seems the lock mutex is not released correctly when write(daemon_pipe[1], &type, 1) != 1 in the function dispatch_request?

flowgrind/src/daemon.c

Lines 1504 to 1514 in 9618dd3

	pthread_mutex_lock(&mutex);
	if (!requests) {
	requests = request;
	requests_last = request;
	} else {
	requests_last->next = request;
	requests_last = request;
	}
	if (write(daemon_pipe[1], &type, 1) != 1) /* Doesn't matter what we write */
	return -1;

[ycaibb]

Hi, developers @arnd @alexander-zimmermann

Any comments would be highly appreciated. Thank you.

Best Regards,