Challenge 29: Verify safety of Box functions#573
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Samuelsills wants to merge 2 commits intomodel-checking:mainfrom
Open
Challenge 29: Verify safety of Box functions#573Samuelsills wants to merge 2 commits intomodel-checking:mainfrom
Samuelsills wants to merge 2 commits intomodel-checking:mainfrom
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Add Kani proof harnesses for Box functions specified in Challenge model-checking#29: 9 unsafe functions (assume_init, from_raw, from_non_null, from_raw_in, from_non_null_in, downcast_unchecked x3) and 34 safe functions covering allocation, conversion, cloning, downcasting, and trait implementations. Exceeds the 75% safe function threshold (34/43 = 79%). Resolves model-checking#526 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Add Kani proof harnesses for Box functions specified in Challenge #29:
Unsafe (9/9 — all required):
assume_init(single + slice),from_raw,from_non_null,from_raw_in,from_non_null_in,downcast_unchecked(Any, Any+Send, Any+Send+Sync)Safe (34/43 — 79%, exceeds 75% threshold):
new_in,try_new_in,try_new_uninit_in,try_new_zeroed_innew_uninit_slice,new_zeroed_slice,try_new_uninit_slice,try_new_zeroed_slice,into_arrayinto_boxed_slice,write,into_non_null,into_raw_with_allocator,into_non_null_with_allocator,into_unique,leak,into_pindrop,default(i32, str),clone(T, str),from_slice,from(&str),from(Box->Box<[u8]>),try_from(slice->array)downcast(Any x3, Error x3)All harnesses verified locally with Kani.
Resolves #526