[PATCH] D106614: [Clang] add btf_tag attribute

[Yonghong Song via Phabricator via cfe-commits]

yonghong-song created this revision.
yonghong-song added reviewers: dblaikie, probinson, aprantl, aaron.ballman, ast.
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A new attribute btf_tag is added. The syntax looks like

  __attribute__((btf_tag(<string>)))

Users may tag a particular structure/member/function/variable
declaration with an arbitrary string and the intention is
that this string is passed to dwarf so it is available for 
post-compilation analysis. The string will be also passed
to .BTF section if the target is BPF.  For detailed use cases,
please see

  https://lists.llvm.org/pipermail/llvm-dev/2021-June/151009.html


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106614

Files:
  clang/include/clang/Basic/Attr.td
  clang/include/clang/Basic/AttrDocs.td
  clang/lib/Sema/SemaDeclAttr.cpp
  clang/test/Misc/pragma-attribute-supported-attributes-list.test
  clang/test/Sema/attr-btf_tag.c

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