[PATCH] D94460: [dsymutil] Copy eh_frame content into the dSYM companion file.

[Jonas Devlieghere via Phabricator via llvm-commits]

JDevlieghere created this revision.
JDevlieghere added reviewers: friss, aprantl, avl.
Herald added a reviewer: alexshap.
JDevlieghere requested review of this revision.
Herald added a project: LLVM.

Copy over the `__eh_frame` from the binary into the dSYM. This helps kernel developers that are working with only dSYMs (i.e. no binaries) when debugging a core file. This only kicks in when the `__eh_frame` exists in the linked binary. Most of the time `ld64` will remove the section in favor of compact unwind info. When it is emitted, it's generally small enough and should not bloat the dSYM.

rdar://69774935


https://reviews.llvm.org/D94460

Files:
  llvm/test/tools/dsymutil/Inputs/private/tmp/eh_frame/eh_frame.o
  llvm/test/tools/dsymutil/Inputs/private/tmp/eh_frame/eh_frame.out
  llvm/test/tools/dsymutil/X86/eh_frame.test
  llvm/tools/dsymutil/MachOUtils.cpp

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