[PATCH] D56437: Support blank flag in SHT_GROUP sections for ELF

[Rui Ueyama via Phabricator via llvm-commits]

ruiu added a comment.

I *believe* that the following strategy seems like a good way to implement the feature (but I didn't try it personally so if you find it unable to work, take another path):

Every input section have a list of `DependentSections`. Usually the list is empty, but if the list is not empty, the GC handles it as edges when doing the mark-sweep garbage collection.

I think you can represent a group with `DependentSections`. If one section in a group is live, all sections in the same group are live. You can pick the first section (an arbitrary section) as a "leader" in a group and add all sections in the group to its `DependentSection`, and add the leader to every member's `DependentSection`.


Repository:
  rLLD LLVM Linker

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56437/new/

https://reviews.llvm.org/D56437