Debugging to a file:
    log enable -STanpstv -f /tmp/log.txt lldb all

Debugging GDB remote protocol commands:
    log enable gdb-remote packets

    https://sourceware.org/gdb/onlinedocs/gdb/Remote-Protocol.html

Debugging with gdb(1):
    Start the server:
        gdb --args lldb-server g *:1234 -- ./signal
        gdb --args lldb-server g *:1234 -- /usr/bin/look

    Start the client:
        lldb
    Inside it:
        process connect connect://localhost:1234