import faulthandler
import os
import signal

def func(signum):
    os.kill(os.getpid(), signum)

def handler(signum, frame):
    pass

signum = signal.SIGUSR1
chain = True

if chain:
    signal.signal(signum, handler)
faulthandler.register(signum, file=None,
                      all_threads=False, chain=True)
func(signum)