Notes on experimental afl driven ui fuzzing only keyboard events for now vcl/workben/eventtesting.writer is just serialized "hello" + ctrl+a + ctrl+b keystrokes to get things started vcl/workben/eventtesting.impress is a bit more involved and inserts text, a new slide via the menu, bullets and undos for all of that currently an arbitrary limit of 50 keystrokes before application quits in order to initially explore that shallow space writer: Xnest :1 cp vcl/workben/eventtesting.writer eventtesting afl-fuzz -f eventtesting -t 10000 -i ~/fuzz/in.vcl -o ~/fuzz/out.vcl -d -T vcl -m 50000000 instdir/program/soffice.bin --nologo --writer --eventtesting --norestore --display :1 impress: Xnest :1 cp vcl/workben/eventtesting.impress eventtesting afl-fuzz -f eventtesting -t 10000 -i ~/fuzz/in.vcl -o ~/fuzz/out.vcl -d -T vcl -m 50000000 instdir/program/soffice.bin --nologo --impress --eventtesting --norestore --display :1 This also works with --headless and no --display entry and thus no Xnest required