Wt

The rr application execution recorder, player, and debugger provides some useful capabilities for debugging wt applications. In particular, it can capture an execution record and provides for both forwards and backward execution with breakpoints and watchpoints. I've only worked with rr for a short time, but it seems to work well. More information here: https://rr-project.org/. It's available in debian and ubuntu, as well as other distribtuions. It's also on github here: https://github.com/rr-debugger/rr.