[all-commits] [llvm/llvm-project] 5fa24a: [lld-macho] Category Merger: add support for addrs...

[alx32 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5fa24ac277172045a81603bb56e66b5f4a27f99e
      https://github.com/llvm/llvm-project/commit/5fa24ac277172045a81603bb56e66b5f4a27f99e
  Author: alx32 <103613512+alx32 at users.noreply.github.com>
  Date:   2024-05-06 (Mon, 06 May 2024)

  Changed paths:
    M lld/MachO/ObjC.cpp
    M lld/test/MachO/objc-category-merging-extern-class-minimal.s

  Log Message:
  -----------
  [lld-macho] Category Merger: add support for addrsig references (#90903)

When generating categories, clang sometimes will generate references in
the `.addrsig` section to the various category data items. Since we may
erase such items after merging them, we also need to remove them from
the `.addrsig` section - otherwise this will cause runtime asserts with
the `.addrsig` section trying to access invalid data.

Implementation wise, we use a hashset to keep track of all erased
`InputSection`'s and then go through all `.addrsig` sections and remove
references to any erased `InputSection`.



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