Remove strictly positive size of blocks in free semantics#509
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josuemoreau wants to merge 1 commit intoAbsInt:masterfrom
Closed
Remove strictly positive size of blocks in free semantics#509josuemoreau wants to merge 1 commit intoAbsInt:masterfrom
josuemoreau wants to merge 1 commit intoAbsInt:masterfrom
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Thanks for this proposal. It will take a while before I can review it in depth, but it sounds interesting. |
xavierleroy
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Mar 18, 2024
Zero-sized blocks work fine, with a slightly different proof of memory injections in Events.v. Co-authored-by: [email protected]
Contributor
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I could finally review, and I like the idea very much. Thanks! I just manually merged this PR, with a slightly simpler proof of the injection diagram in Events.v (commit e1ea590). |
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The condition
Ptrofs.unsigned sz > 0in the semantics offreemakes it difficult to prove that a program cannot block when callingfree. So, this commit removes it, at the expense of a slightly more complicated proof thatfreeis a proper external function.