[PATCH] D55109: [LLD][ELF] - Improve the DWARF v5 suport for building .gdb_index.

[George Rimar via Phabricator via llvm-commits]

grimar created this revision.
grimar added a reviewer: ruiu.
Herald added subscribers: arphaman, JDevlieghere, arichardson, aprantl, emaste.
Herald added a reviewer: espindola.

Now LLD might build the broken/incomplete .gdb_index when some DWARF v5
sections (like .debug_rnglists and .debug_addr) are used.

Particularly, for the case above, we emit an empty address area. 
A test case is provided and patch fixes the issue.


https://reviews.llvm.org/D55109

Files:
  ELF/DWARF.cpp
  ELF/DWARF.h
  test/ELF/gdb-index-rng-lists.s

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