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A long time ago, someone got "cryofreeze" working on Linux processes, where you could freeze a process to disk and unfreeze it later .. but this was purely experimental and doesn't seem to have persisted. Anyway, in my lab environment where I had this running .. over a decade ago now I guess .. I set up scripts to automatically cryofreeze the daemon processes I was writing, so I could indeed reset to the state in time, of interest during testing. This lab got re-comissioned for other things, and a needed kernel upgrade broke cryofreeze, and I never got back to it - but I have often wondered about it, as a temporal interface to some things would make for a whole new world of useful UI and other interation paradigms to explore. I remember there was something like this possible on WANG and Tandem systems back in the 80's, and it always has kind of piqued my interest as to why this isn't still considered a thing. Well, I guess syscall complexity has vastly changed since WANG and Tandem were around, lol. Anyway, I'd love to be able to do this on Linux again - I keep thinking to catch up with the state of the art of process freezing/unfreezing, so this has motivated me to do this - although I do confess that, as principally a Lua/C developer in my chosen market (embedded), I attain this re-playability in other ways (state sync'ing) which also allows me to move processes to other systems, relatively smoothly, also. Still, would love to have this for normal Linux processes, out of the box. Am I ignoring an obvious way to do this? |
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