Limit FFI calls by default to explicitly supported ones #2428
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C-FFI is pretty broken right now. Limit its usage to only support built-in functions that are explicitly included in Kani. User's should still be enable to go back to previous behavior by enabling unstable C-FFI support
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zhassan-aws
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kani-compiler/src/codegen_cprover_gotoc/codegen/foreign_function.rs
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zhassan-aws
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Co-authored-by: Zyad Hassan <88045115+zhassan-aws@users.noreply.github.com>
feliperodri
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May 5, 2023
- Add / improve comments - Add expected file - Fix variadic test - improve test
zhassan-aws
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kani-compiler/src/codegen_cprover_gotoc/codegen/foreign_function.rs
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…on.rs Co-authored-by: Zyad Hassan <88045115+zhassan-aws@users.noreply.github.com>
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Description of changes:
C-FFI is fairly unstable right now and the lack of error handling causes a poor experience when things go wrong.
In this PR, we limit its usage to only support CBMC built-in functions that are explicitly included in Kani and alloc functions from
kani_lib.c. User's should still be enable to go back to previous behavior by enabling unstable C-FFI supportResolved issues:
Resolves #1781
Related RFC:
Call-outs:
This PR is currently blocked by #2427. Once that gets merged, the regression should pass.
Testing:
How is this change tested? New tests
Is this a refactor change? Kinda
Checklist
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.