[all-commits] [llvm/llvm-project] 41fc4d: [Clang][Sema] Add fortify warnings for strlcpy (#2...

[Venkatesh Srinivasan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 41fc4d5609d5f2414a2bbf9cf7e1ecd09fe5a01a
      https://github.com/llvm/llvm-project/commit/41fc4d5609d5f2414a2bbf9cf7e1ecd09fe5a01a
  Author: Venkatesh Srinivasan <156861430+venk-ks at users.noreply.github.com>
  Date:   2026-09-10 (Thu, 10 Sep 2026)

  Changed paths:
    M clang/docs/ReleaseNotes.md
    M clang/include/clang/Basic/Builtins.td
    M clang/lib/AST/Decl.cpp
    M clang/lib/Sema/SemaChecking.cpp
    M clang/test/Sema/builtins.c
    M clang/test/Sema/warn-fortify-source.c
    M clang/test/Sema/warn-strlcpycat-size.c

  Log Message:
  -----------
  [Clang][Sema] Add fortify warnings for strlcpy (#221325)

Add `-Wfortify-source` diagnostics for `strlcpy` and `__builtin_strlcpy`
when the size argument exceeds the destination buffer size.

This is directly analogous to the previous PR for `strlcat` (#220341).

Also update `clang/test/Sema/warn-strlcpycat-size.c` and
`clang/test/Sema/builtins.c` to expect the `-Wfortify-source` warnings
where test calls pass sizes larger than the destination buffer capacity.

Part of #142230

Assisted-by: Gemini



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