[all-commits] [llvm/llvm-project] d179ac: [clang] Implement -fptrauth-auth-traps. (#102417)

[Ahmed Bougacha via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d179acd0484bac30c5ebbbed4d29a4734d92ac93
      https://github.com/llvm/llvm-project/commit/d179acd0484bac30c5ebbbed4d29a4734d92ac93
  Author: Ahmed Bougacha <ahmed at bougacha.org>
  Date:   2024-08-09 (Fri, 09 Aug 2024)

  Changed paths:
    M clang/include/clang/Basic/PointerAuthOptions.h
    M clang/lib/CodeGen/CodeGenFunction.cpp
    M clang/lib/Frontend/CompilerInvocation.cpp
    M clang/test/CodeGen/ptrauth-function-attributes.c

  Log Message:
  -----------
  [clang] Implement -fptrauth-auth-traps. (#102417)

This provides -fptrauth-auth-traps, which at the frontend level only
controls the addition of the "ptrauth-auth-traps" function attribute.

The attribute in turn controls various aspects of backend codegen, by
providing the guarantee that every "auth" operation generated will trap
on failure.

This can either be delegated to the hardware (if AArch64 FPAC is known
to be available), in which case this attribute doesn't change codegen.
Otherwise, if FPAC isn't available, this asks the backend to emit
additional instructions to check and trap on auth failure.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications