Add ability to log allocations/frees for easily reporting bugs

[fitzgen]

Summary

We would write all allocations and frees into a buffer that we periodically flush to a file. When people report a bug, they could enable this feature, and provide their log.

Motivation

Easier to file bugs. Easier to reproduce bugs. Therefore, easier to fix bugs.

Details

• Behind a cargo feature.

• I guess we could use std::io::BufWriter, and say that this feature requires std

• Ideally this would use the same operation definitions in ./test, so we could trivially turn them into regression tests. Also, shrink them to get reduced test cases.

[joaolucasl]

I'm reading the source code more carefully to see if I can give this one a crack!

[fitzgen]

@joaolucasl Awesome -- let me know if you have any questions!

[CPerezz]

hi @fitzgen I would like to try this one. I don't know if this lib is still mantained and actively updated. Or there are any alternatives that made this lib obsolete. But if this lib is still up to date and you're mantaining it, I would like to help! And also learn, why not 😅

I'm not sure whether @joaolucasl is still developing this. But I guess not. So if it's ok for you @fitzgen I'll give it a try!

[joaolucasl]

Go ahead @CPerezz, I tried at the time and after a while trying I just left it alone. If you want, feel free to give it a crack