Re-entrancy for extract_function_ast

[SturgeonInc]

I have a use-case where being able to call extract_function_ast from within a function being PE'd (at PE time, I mean) would be useful, but this does not seem to work. Is there a good way to do this? And if not, is it even possible for this feature to be implemented?

[AjayBrahmakshatriya]

Hi @SturgeonInc as you noticed, extract_function_ast` is specifically meant to me non-re-entrant for the reason that BuildIt often runs the function multiple times to extract the entire function. This will cause probably incorrect extraction.

I would like to understand the application/use-case you have in mind so I can maybe provide a better solution.

In the meantime, I can point to samples/sample41.cpp where we have a "working set" pattern, where new functions to be extracted are enqueued with their parameters in a set and an external loop extracts all of these. This might help with your use-case if you just want to extract a bunch of functions that are discovered dynamically.

If you could summarize what you are trying to do, I can provide more pointers.

[AjayBrahmakshatriya]

@SturgeonInc just wanted to check if the above answers your question. If you need any more inputs, I am happy to help! Or if this answers what you need, feel free to close the issue!