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llvm / llvm-project / b6dbda67d8f687350de66e68a7fd61433fac7107
commitb6dbda67d8f687350de66e68a7fd61433fac7107[log] [tgz]
authorAhmed Bougacha <ahmed@bougacha.org>Mon Jul 22 16:41:22 2024 -0700
committerGitHub <noreply@github.com>Mon Jul 22 16:41:22 2024 -0700
tree495ef5c6f6ac2de06258f24ceb61deccc3ffb8d6
parentd4da96d6b1d5d8128fc57c8148785144c7b96705 [diff]
[clang] Implement type/address discrimination of type_info vtable. (#99726)

We want to be able to support full type and address discrimination of
type_info on targets that don't have existing ABI compatibility
constraints.

This patch does not enable such behavior on any platform, it just adds
the necessary machinery.

In clang we add a new commandline argument to control the type_info
vtable ABI:
  -fptrauth-type-info-vtable-pointer-discrimination

and a feature flag to allow source level detection of the ABI:
  __has_feature(ptrauth_type_info_vtable_pointer_discrimination)

Co-authored-by: Oliver Hunt <oliver@apple.com>
6 files changed
tree: 495ef5c6f6ac2de06258f24ceb61deccc3ffb8d6
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. libc/
  11. libclc/
  12. libcxx/
  13. libcxxabi/
  14. libunwind/
  15. lld/
  16. lldb/
  17. llvm/
  18. llvm-libgcc/
  19. mlir/
  20. offload/
  21. openmp/
  22. polly/
  23. pstl/
  24. runtimes/
  25. third-party/
  26. utils/
  27. .clang-format
  28. .clang-tidy
  29. .git-blame-ignore-revs
  30. .gitattributes
  31. .gitignore
  32. .mailmap
  33. CODE_OF_CONDUCT.md
  34. CONTRIBUTING.md
  35. LICENSE.TXT
  36. pyproject.toml
  37. README.md
  38. SECURITY.md
README.md

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