rsmith added inline comments.

================
Comment at: 
clang-tools-extra/docs/clang-tidy/checks/bugprone-problematic-statics.rst:7-8
+Detects functions defined in headers that return the address of a static
+local variable. These are not guaranteed to have the same addresss across
+shared libraries and could be problematic for plugins.
+
----------------
The C++ language rules do guarantee that such static locals have the same 
address throughout the entire program. Should this warning check the symbol 
visibility / `dllexport`edness? People are going to learn the wrong thing if we 
give them this diagnostic without any further explanation.

If the concern is plugins loaded with `RTLD_LOCAL`, sharing C++ interfaces 
across an `RTLD_LOCAL` boundary is pretty fundamentally broken, and this is far 
from the only way in which it goes wrong. It might be better to warn on all 
non-`RTLD_GLOBAL` calls to `dlopen` from C++ code...


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D54222/new/

https://reviews.llvm.org/D54222

_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits

Reply via email to