On Tuesday, 21 May 2019 01:18:34 UTC-4, Ben Hoyt wrote: > > I'm looking at adding a timeout option to my GoAWK script interpreter... > Are there better / more performant ways to handle this? >
Hi Ben, imposing resource bounds is a tricky problem. It's possible to do it in an interpreter implemented in C++, but it requires careful discipline throughout the implementation. It is essentially impossible to do in a target language whose variables are recycled by the garbage collector of the host language. Turing incompleteness of the target language (bounded recursion only) seems like it ought to help but in fact does not; a bounded program can still use all your memory and take ~forever. The only reliable way to impose bounds is to use the operating system. Put the untrusted code in a different process, impose a limit on its maximum memory size, and kill it if it hasn't finished by your deadline. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/b4182f6d-8a3c-41a2-9cb0-e9d3c7fb1780%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
