This is posted as Issue 250501.1: https://dwarfstd.org/issues/250501.1.html
-cary On Tue, Apr 29, 2025 at 10:24 AM Tom Tromey via Dwarf-discuss < dwarf-discuss@lists.dwarfstd.org> wrote: > >>>>> "Simon" == Simon Marchi <sim...@simark.ca> writes: > > Simon> Just to make sure I understand, can you clarify how > Simon> DW_AT_data_member_location and DW_AT_bit_offset are used in this > Simon> case? In particular, which one is constant and which one is an > Simon> evaluated expression? > > Dynamic DW_AT_data_member_location, static DW_AT_bit_offset: > > > <5><117a>: Abbrev Number: 17 (DW_TAG_member) > <117b> DW_AT_name : (indirect string, offset: 0x1959): > another_field > ... > <1188> DW_AT_bit_offset : 6 > <1189> DW_AT_data_member_location: 6 byte block: 99 3d 1 0 0 22 > (DW_OP_call4: <0x1193>; DW_OP_plus) > ... > <3><1193>: Abbrev Number: 2 (DW_TAG_dwarf_procedure) > <1194> DW_AT_location : 15 byte block: 97 94 1 37 1a 32 1e 23 7 > 38 1b 31 1c 23 3 (DW_OP_push_object_address; DW_OP_deref_size: 1; > DW_OP_lit7; DW_OP_and; DW_OP_lit2; DW_OP_mul; DW_OP_plus_uconst: 7; > DW_OP_lit8; DW_OP_div; DW_OP_lit1; DW_OP_minus; DW_OP_plus_uconst: 3) > > > This comes from the description of this gdb patch, which includes a test > case. (However, you'd need a patched GCC to get this output.) > > https://sourceware.org/pipermail/gdb-patches/2025-April/217289.html > > Tom > -- > Dwarf-discuss mailing list > Dwarf-discuss@lists.dwarfstd.org > https://lists.dwarfstd.org/mailman/listinfo/dwarf-discuss >
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