[all-commits] [llvm/llvm-project] c23135: -fsanitize=function: fix .subsections_via_symbols ...

[Leonard Grey via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c23135c5488fbfaf6439433a10b3ddef33ff112c
      https://github.com/llvm/llvm-project/commit/c23135c5488fbfaf6439433a10b3ddef33ff112c
  Author: Leonard Grey <lgrey at chromium.org>
  Date:   2024-04-08 (Mon, 08 Apr 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/AsmPrinter.h
    M llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
    M llvm/test/CodeGen/AArch64/func-sanitizer.ll
    M llvm/test/CodeGen/X86/func-sanitizer.ll

  Log Message:
  -----------
  -fsanitize=function: fix .subsections_via_symbols (#87527)

-fsanitize=function emits a signature and function hash before a
function. Similar to 7f6e2c9, these can be sheared off when
`.subsections_via_symbols` is used.

This change uses the same technique 7f6e2c9 introduced for prefixes:
emitting a symbol for the metadata, then marking the actual function
entry as an .alt_entry symbol.



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