Stackless Python allows you to run tasks for a certain number of instructions: https://stackless.readthedocs.io/en/latest/library/stackless/pickling.html https:

Stackless Python allows you to run tasks for a certain number of instructions: https://stackless.readthedocs.io/en/latest/library/stackless/pickling.html https://stackless.readthedocs.io/en/latest/library/stackless... Unfortunately, the Python VM is impossible to sandbox much further as it is. You have (internal) resource security, but can't limit access to the network, or say a specific file in the filesystem. Mutable globals everywhere. The https://en.wikipedia.org/wiki/E_programming_language https://en.wikipedia.org/wiki/E_programming_language has capability security, but no resource exhaustion protection. The only systems were both where integrated were a series of 1980s operating systems (GNOSIS, KEYKOS, https://en.wikipedia.org/wiki/KeyKOS https://en.wikipedia.org/wiki/KeyKOS) that were designed to allow secure and accountable multi-user timesharing on mainframes. They are predecessors of the formally verified sel4 operating system. There has never been a similar system on an OS/Processor independent virtual machine level. For fun, I created this little VM: https://esolangs.org/wiki/RarVM https://esolangs.org/wiki/RarVM