ayermolo wrote: @clayborg Figured I reply here to your comment: https://github.com/llvm/llvm-project/pull/88092#issuecomment-2059961175 This was regarding merging .debug_names in linker (although types are not implemented yet there), but FYI BOLT output is similar. All the CUs are in one module. Entry for type unit will have two indexes. One for CU to which it belongs and another for type unit. Which can either be local or foreign. example: ``` Compilation Unit offsets [ CU[0]: 0x00000000 CU[1]: 0x00000029 ] Foreign Type Unit signatures [ ForeignTU[0]: 0x49dc260088be7e56 ForeignTU[1]: 0x104ec427d2ebea6f ForeignTU[2]: 0xca1e65a66d92b970 ForeignTU[3]: 0x104ec427d2ebea6f ] ... Bucket 1 [ Name 1 { Hash: 0x7C96E4DB String: 0x00000027 "Foo2" Entry @ 0x117 { Abbrev: 0x1 Tag: DW_TAG_structure_type DW_IDX_type_unit: 0x00 DW_IDX_compile_unit: 0x00 DW_IDX_die_offset: 0x00000021 DW_IDX_parent: <parent not indexed> } } ```
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