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[ubsan] Don't emit function signatures for virtual methods

Authored by vsk on Oct 13 2017, 5:41 PM.



The function sanitizer only checks indirect calls through function
pointers. This excludes all non-static member functions (constructor
calls, calls through thunks, etc all use a separate code path). Don't
emit function signatures for functions that won't be checked.

Apart from cutting down on code size, this should fix a regression on
Linux caused by r313096. For context, see the mailing list discussion:

r313096 - [ubsan] Function Sanitizer: Don't require writable text segments

Testing: check-clang, check-ubsan

Supersedes D38903.

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Event Timeline

vsk created this revision.Oct 13 2017, 5:41 PM
pcc accepted this revision.Oct 13 2017, 6:11 PM


Small nit on the first line of the commit message: it should probably mention non-static member functions, rather than virtual methods.

This revision is now accepted and ready to land.Oct 13 2017, 6:11 PM
This revision was automatically updated to reflect the committed changes.