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Proving the Correctness of GNAT Light Runtime Library

Talkat FOSDEM 2022 · on Sunday, 2022-02-06· at 16:25· D.ada· [embedded-and-hardware]

speaker

name:Yannick Moy
links:none on file

resources

video:https://video.fosdem.org/2022/D.ada/ada_proving_gnat_light_runtime.mp4
slides:https://fosdem.org/2022/schedule/event/ada_proving_gnat_light_runtime/attachments/slides/4989/export/events/attachments/ada_proving_gnat_light_runtime/slides/4989/slides.pdf

summary

Covers the use of SPARK (a formally analyzable Ada subset) to prove correctness properties of GNAT's light runtime library — the small Ada runtime used for embedded and certified systems (bare-metal or with an OS). Describes applying proof to about 30 of the ~180 runtime units (I/O, numerics, text, memory), what was proven (absence of runtime errors and conformance to functional specs), and bugs found/fixed during that effort.

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