[PATCH] D38913: [ubsan] Don't emit function signatures for virtual methods

[Vedant Kumar via Phabricator via cfe-commits]

vsk created this revision.

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 https://reviews.llvm.org/D38903.


https://reviews.llvm.org/D38913

Files:
  lib/CodeGen/CodeGenFunction.cpp
  test/CodeGenCXX/catch-undef-behavior.cpp

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