[PATCH] D66426: [lld] Enable a watermark of loadable sections to be generated and placed in a note section

[Rui Ueyama via Phabricator via llvm-commits]

ruiu added a comment.

IIRC lld's --build-id={md5,sha1} was slow at first but after we made them a tree-hash to utilize mutli-cores, its cost became negligible. Have you considered taking that approach? This watermark hash is probably not a thing that people attack by the collision attack, so it might not have to be a cryptographically-safe hash, but still cryptographically-safe hash function has nice properties compared to non-crypto ones.


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