gdb reversible mode is useless for anything other than a toy example. We never got to the point where you can e.g. start the PyPy process, not to mention do any

gdb reversible mode is useless for anything other than a toy example. We never got to the point where you can e.g. start the PyPy process, not to mention do anything with it. We had much more luck with UndoDB, but this one is still ~20x slower than native.