[PATCH] D42481: [DebugInfo] Add basic support for DWARF 5 .debug_rnglists dumping

[James Henderson via Phabricator via llvm-commits]

jhenderson created this revision.
jhenderson added reviewers: probinson, JDevlieghere, aprantl, dblaikie.
Herald added subscribers: hintonda, mgorny.

This change adds support to llvm-dwarfdump for dumping a DWARF5 .debug_rnglists section in a regular ELF file. It is not complete, in that several DW_RLE_* encodings are not currently supported, but does dump the header and the basic ranges for DW_RLE_start_length and DW_RLE_start_end encodings.

Obvious next steps are to add verbose dumping that dumps the raw encodings, rather than the interpreted contents, to add -verify support of the section (e.g. to show that the correct number of offsets is included), add dumping of .debug_rnglists.dwo, and to add support for other encodings.


Repository:
  rL LLVM

https://reviews.llvm.org/D42481

Files:
  include/llvm/BinaryFormat/Dwarf.def
  include/llvm/DebugInfo/DWARF/DWARFDebugRnglists.h
  include/llvm/DebugInfo/DWARF/DWARFObject.h
  lib/DebugInfo/DWARF/CMakeLists.txt
  lib/DebugInfo/DWARF/DWARFContext.cpp
  lib/DebugInfo/DWARF/DWARFDebugRnglists.cpp
  test/tools/llvm-dwarfdump/X86/Inputs/debug_rnglists_invalid_header.s
  test/tools/llvm-dwarfdump/X86/Inputs/debug_rnglists_invalid_offset_entries.s
  test/tools/llvm-dwarfdump/X86/Inputs/debug_rnglists_long_length.s
  test/tools/llvm-dwarfdump/X86/Inputs/debug_rnglists_short_length.s
  test/tools/llvm-dwarfdump/X86/debug_rnglists.s
  test/tools/llvm-dwarfdump/X86/debug_rnglists_empty.s
  test/tools/llvm-dwarfdump/X86/debug_rnglists_invalid.test
  test/tools/llvm-dwarfdump/X86/debug_rnglists_unknown_encoding.s

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