Assault a process with repeated SIGINTs as fast as possible. This can determine if those processes reinstate their signal handler promptly enough or if they allow it to lapse into the default handler. Some systems (like OpenBSD) do not require handlers to reinstate themselves and block a storm of signals while a handler is processing, so you won't be able to mess programs up.
Usage: ./dkill -p <pid> -x <times>
A nice target for Dkill. It sleeps in the handler to open up a window of attack.
Generate a random number from a segfault. It overwrites memory until a segfault happens, outputting the ptrdiff_t offset each time. The segfault stops the counter, and you can retrieve the final value as a random number.
How to get ten random numbers:
yes | head -n 10 | xargs -L 1 sh -c './segrand | tail -1'(Works on OpenBSD, but on MacOS the number is deterministic)