From https://github.com/flutter/tools/issues/111

Two things we'd want to do:

have it start the VM with the --pause_isolates_on_start=true flag
start it up listening on a specific port
The pause isolates flag will let us set breakpoints on isolates before they start running. Otherwise we'll miss breakpoints early in the app's lifecycle.