Vedant Kumar 8c4a65b9b2 [ubsan] Check implicit casts in ObjC for-in statements ...

Check that the implicit cast from `id` used to construct the element
variable in an ObjC for-in statement is valid.

This check is included as part of a new `objc-cast` sanitizer, outside
of the main 'undefined' group, as (IIUC) the behavior it's checking for
is not technically UB.

The check can be extended to cover other kinds of invalid casts in ObjC.

Partially addresses: rdar://12903059, rdar://9542496

Differential Revision: https://reviews.llvm.org/D71491

2020-07-13 15:11:18 -07:00

5.2 KiB

Raw Blame History

View Raw