[llvm-branch-commits] [libc++] Annotate classes with _LIBCPP_PFP to enable pointer field protection (PR #151652)

[Peter Collingbourne via llvm-branch-commits]

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@@ -303,7 +303,7 @@ using __shared_ptr_nullptr_deleter_ctor_reqs _LIBCPP_NODEBUG =
 #endif
 
 template <class _Tp>
-class _LIBCPP_SHARED_PTR_TRIVIAL_ABI shared_ptr {
+class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_PFP shared_ptr {
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pcc wrote:

Not explicitly, but we could assert that the type is non-standard-layout if the pfp feature is enabled (the feature itself will be added in #152414). I've added a test that does that.

https://github.com/llvm/llvm-project/pull/151652