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Content Provider | ACM Digital Library |
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Author | Myreen, Magnus O. Owens, Scott Kumar, Ramana Norrish, Michael |
Abstract | We have developed and mechanically verified an ML system called CakeML, which supports a substantial subset of Standard ML. CakeML is implemented as an interactive read-eval-print loop (REPL) in x86-64 machine code. Our correctness theorem ensures that this REPL implementation prints only those results permitted by the semantics of CakeML. Our verification effort touches on a breadth of topics including lexing, parsing, type checking, incremental and dynamic compilation, garbage collection, arbitrary-precision arithmetic, and compiler bootstrapping. Our contributions are twofold. The first is simply in building a system that is end-to-end verified, demonstrating that each piece of such a verification effort can in practice be composed with the others, and ensuring that none of the pieces rely on any over-simplifying assumptions. The second is developing novel approaches to some of the more challenging aspects of the verification. In particular, our formally verified compiler can bootstrap itself: we apply the verified compiler to itself to produce a verified machine-code implementation of the compiler. Additionally, our compiler proof handles diverging input programs with a lightweight approach based on logical timeout exceptions. The entire development was carried out in the HOL4 theorem prover. |
Starting Page | 179 |
Ending Page | 191 |
Page Count | 13 |
File Format | PDF MP4 |
ISBN | 9781450325448 |
DOI | 10.1145/2535838.2535841 |
Language | English |
Publisher | Association for Computing Machinery (ACM) |
Publisher Date | 2014-01-11 |
Publisher Place | New York |
Access Restriction | Subscribed |
Subject Keyword | Read-eval-print loop Verified parsing Verified garbage collection. Machine code verification Compiler bootstrapping Ml Compiler verification Verified type checking |
Content Type | Audio Text |
Resource Type | Article |
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