Audit for unchecked intrinsics#1076
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adpaco-aws merged 6 commits intomodel-checking:mainfrom Apr 20, 2022
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zhassan-aws
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tedinski
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Apr 26, 2022
* Add positive test cases * Refactor `div_does_not_overflow` into fn, use in macro * Add negative test cases * Add negative tests for regular div/rem * Minor fixes for div/rem cases
tedinski
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Apr 27, 2022
* Add positive test cases * Refactor `div_does_not_overflow` into fn, use in macro * Add negative test cases * Add negative tests for regular div/rem * Minor fixes for div/rem cases
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Description of changes:
Reviews and adds tests for all
unchecked_*operations.The most notable change is the addition of an overflow check for
unchecked_divandunchecked_rem, which were not failing in the case wherea == T::MIN && b == -1. This check was already written forexact_divso I refactored it into a function which is now used for unchecked div/rem.Then, I was afraid this was also the case for standard div/rem operations, but turns out this overflow check is already covered so no changes are needed. The tests I wrote to verify this are included as well.
Resolved issues:
Part of #727
Call-outs:
Testing:
How is this change tested? Adds many tests, in particular the ones to check an overflow that was previously not checked.
Is this a refactor change? No.
Checklist
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.