If I discover reflective access calls with native-image-agent and with config-merge-dir set (so I can instrument multiple inputs) is there an equivalent to config-merge-dir to merge the trace files necessary for a modified refl to run?

@rickmoynihan I think trace files are just a vector of things, so you could just append them?

yeah was just going to say essentially that

if you have improvements to refl, feel free to raise PRs

Happy to help; but I guess the reason it’s not a library is because it’s not obvious how to extract the reusable bits from a specific build just yet

Right now I’m thinking it might be better to split the run into two phases. 1. a task to generate merged reflect configs with merge-dir set 2. a task to generate separate trace files 3. a final task that generates the cleaned config by iterating over each trace-file

correct, molding this into a library would be too soon as it's probably project-specific how to use this

:thumbsup:

I was more thinking of improvements to filtering out false positives

the merge stuff afaik isn't available in the readily available distribution

only when you build yourself with mx ?

You can use config-merge-dir without that

The native image configure tool doesn’t appear to work without building with mx though

Though tbh I’m not entirely sure what that tool is, or what it means

but I’ve used config-merge-dir just fine before

i.e. just set that, run the process a bunch of time with different inputs; then compile to a native image as normal with a merged reflection config; and all the reflective calls for those inputs are bottomed out properly. (With lots of false positives though — hence why I need your refl stuff! 🙂 )

@rickmoynihan but how do you merge the configs?

Simply run multiple times with this: -agentlib:native-image-agent=config-merge-dir=nativecfg instead of this: -agentlib:native-image-agent=config-output-dir=nativecfg

so it just merges the existing configs in the nativecfg dir with existing ones?

I didn't know that

yup

it’s very handy

by the way I’m really enjoying using the bb task runner, it’s really, really nice! 🙇

refl made me finally bite the bullet and start using it for this project

@borkdude: FYI I’ve just modified my usage of refl to do all of the above and I can confirm it works a charm! 🎉 concat traces and merge configs. I’m going afk for a few days though; but if you’re interested I’m happy to discuss pushing back the refactorings necessary, when I’m back next week. Though it’s not really very complicated.

Mainly just moving responsibilities around

@rickmoynihan yes please :)