[PATCH] D37860: [MSan] Enable use-after-dtor instrumentation by default.

[Evgenii Stepanov via Phabricator via cfe-commits]

eugenis added a comment.

Looking at __sanitizer_dtor_callback implementation, this change will add a (fast) stack unwind in every destructor. In extreme cases (like a tight loop doing string operations) it could be bad for performance. I've seen ~15% AFAIR.


https://reviews.llvm.org/D37860