Last time I used C I set a SIGSEGV handler that printed a stack-trace and exited. Which made debugging somewhat easier. (Although It was often segfaulting in libwayland, which didn't help as much as I would like)

SIGBUS is simialr to SIGSEGV (It happens if a mmap is larger that the backing file and you try to read the unbacked memory). You basically have to handle it if you don't control the backing file, Eg: with shared memory when the other process resizes it after you've mmap'd it. libwayland-server can install one for you that replaces the map with 0'd memory.