[PATCH] D136879: [LLD] [COFF] Include "rust_eh_personality" among the known personality functions

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo created this revision.
mstorsjo added reviewers: rnk, mati865.
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These need to have special treatment wrt to .eh_frame sections
and GC - as long as we don't have a full parser of the .eh_frame
section in the COFF linker.

This fixes Rust unwind issues on i686 mingw as discussed in
https://github.com/msys2/MINGW-packages/issues/9091.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136879

Files:
  lld/COFF/Driver.cpp


Index: lld/COFF/Driver.cpp
===================================================================
--- lld/COFF/Driver.cpp
+++ lld/COFF/Driver.cpp
@@ -2415,7 +2415,8 @@
       // For now, just manually try to retain the known possible personality
       // functions. This doesn't bring in more object files, but only marks
       // functions that already have been included to be retained.
-      for (const char *n : {"__gxx_personality_v0", "__gcc_personality_v0"}) {
+      for (const char *n : {"__gxx_personality_v0", "__gcc_personality_v0",
+                            "rust_eh_personality"}) {
         Defined *d = dyn_cast_or_null<Defined>(ctx.symtab.findUnderscore(n));
         if (d && !d->isGCRoot) {
           d->isGCRoot = true;


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