Towards Proving Memory Initialization #3264
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celinval
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Jun 13, 2024
celinval
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Jun 13, 2024
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celinval
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Jun 28, 2024
kani-compiler/src/kani_middle/transform/check_uninit/uninit_visitor.rs
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kani-compiler/src/kani_middle/transform/check_uninit/uninit_visitor.rs
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kani-compiler/src/kani_middle/transform/check_uninit/uninit_visitor.rs
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kani-compiler/src/kani_middle/transform/check_uninit/uninit_visitor.rs
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celinval
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kani-compiler/src/kani_middle/transform/check_uninit/uninit_visitor.rs
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…sitor.rs Co-authored-by: Celina G. Val <celinval@amazon.com>
artemagvanian
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…cks (#3313) This is a follow-up PR for #3264, a part of the larger work towards #3300. This PR introduces: - Use of demonic non-determinism (prophecy variables) to improve memory initialization checks performance; - Instead of keeping track of memory initialization of each possibly uninitialized byte pointed to by some pointer, one is chosen non-deterministically; - Tests for proper memory initialization checks injection for compiler intrinsics; - Separate functions for checking memory initialization of slice chunks. By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses. --------- Co-authored-by: Zyad Hassan <88045115+zhassan-aws@users.noreply.github.com>
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This PR enables automatic memory initialization proofs for raw pointers in Kani. This is done without any extra instrumentation from the user.
Currently, due to high memory consumption and only partial support of pointee types for which memory initialization proofs work, this feature is gated behind
-Z uninit-checksflag. Note that because it uses shadow memory under the hood, programs using this feature need to pass-Z ghost-stateflag as well.This PR is a part of working towards #3300.
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.