[PATCH] D59220: [asan] Add options -asan-detect-invalid-pointer-cmp and -asan-detect-invalid-pointer-sub options.

[pierre gousseau via Phabricator via llvm-commits]

pgousseau marked an inline comment as done.
pgousseau added a comment.

In D59220#1443749 <https://reviews.llvm.org/D59220#1443749>, @vitalybuka wrote:

> What is exactly going to be checked by -fsanitize=pointer-compare and -fsanitize=pointer-subtract?
>  Why this needs to be done in AddressSanitizer?
>  Is this going just checheck that pointers are from the same allocation?


-fsanitize=pointer-compare and -fsanitize=pointer-subtract instrument comparison operation (<, <=, >, >=) and '-' operation with pointer operands.
It relies on AddressSanitizer to check the origin of the allocation. gcc also requires -fsanitize=address for -fsanitize=pointer-compare and -fsanitize=pointer-subtract, so I think it is expected to depend on Asan? Thanks!


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https://reviews.llvm.org/D59220