[all-commits] [llvm/llvm-project] 8ee5c4: [DebugInfo] Support to get TU for hash from .debug...

[Liu Ke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8ee5c40fcff7b90b19cff3d0a103f1b658cf29b9
      https://github.com/llvm/llvm-project/commit/8ee5c40fcff7b90b19cff3d0a103f1b658cf29b9
  Author: Liu Ke <liuke.gehry at bytedance.com>
  Date:   2025-10-28 (Tue, 28 Oct 2025)

  Changed paths:
    M bolt/test/X86/dwarf4-ftypes-dwp-input-dwo-output.test
    M llvm/include/llvm/DebugInfo/DWARF/DWARFUnit.h
    M llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
    M llvm/lib/DebugInfo/DWARF/DWARFUnit.cpp
    A llvm/test/tools/llvm-dwarfdump/X86/type_units_split_dwp_v4.s

  Log Message:
  -----------
  [DebugInfo] Support to get TU for hash from .debug_types.dwo section in DWARF4. (#161067)

Using the DWP's cu_index/tu_index only loads the DWO units from the
.debug_info.dwo section for hash, which works fine in DWARF5. However,
tu_index points to .debug_types.dwo section in DWARF4, which can cause
the type unit to be lost due to the incorrect loading target. (Related
discussion in
[811b60f](https://github.com/llvm/llvm-project/commit/811b60f0b99dad4b2989d21dde38d49155b0c4f9))

This patch supports to get the type unit for hash from .debug_types.dwo
section in DWARF4.



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