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Don't sanitize linker_set
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Authored by matthew.bryan_isilon.com on Nov 5 2019, 3:23 AM.
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Details

Summary

The assumptions of linker_set don't play nicely with AddressSanitizer. AddressSanitizer adds a 'redzone' of zeros around globals (including those in named sections), whereas linker_set assumes they are all packed consecutively like a pointer array. So: let's annotate linker_set so that AddressSanitizer ignores it.

Adding Konstantin to the review as somebody who touched linker_set recently.

Test Plan

Manual testing to demonstrate that linker_set pointers are consecutive with no redzone. Compiled and ran the kernel and ran few kyua tests for sanity.

Diff Detail

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rS FreeBSD src repository - subversion
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Event Timeline

This revision is now accepted and ready to land.Nov 5 2019, 5:55 AM
kib added inline comments.
sys/sys/linker_set.h
65

I prefer that you put the new attribute after __used.

This revision was automatically updated to reflect the committed changes.