die_get_member_type(9)

📦 version 7.3.1, in nixpkgs unstable

💅 die_get_member_type(9)

ok so real talk, bestie — this is a page straight out of the Kernel API Manual, section 9, and it's about one adorable little function called die_get_member_type. she's a DWARF girlie and she's here to tell you what type a struct member is. periodt. 🎀

✨ SYNOPSIS ✨

Dwarf_Die * die_get_member_type (Dwarf_Die *type_die , int offset ,
Dwarf_Die *die_mem );

that's the whole signature, no cap — three args, returns a Dwarf_Die *. 🦋

🌸 ARGUMENTS 🌸

  • type_die — a type DIE. yes bestie, the type. this is where we go looking for the member.
  • offset — offset in the type. literally where inside the type we're peeking 👀
  • die_mem — a buffer to save the resulting DIE. she holds the answer for you, so bring her along 💖

👑 DESCRIPTION 👑

okay so here's the vibe: this function returns a type of a member in type_die where it's located at offset — if it's a struct. iykyk 🫶

so if type_die is a struct? slay, you get the member's type back. 💅

if it's a union? for now, it just returns the first matching member in a union. that's it, that's the whole union situation, no further searching. 🙈

and for other types? it'd return the given type directly if it's within the size of the type — or NULL otherwise. so like, in-bounds = you get your type back, out-of-bounds = NULL, full stop, don't @ me. ⭐

💀 SEE ALSO 💀

the whole friend group, gathered so you never have to search alone 💜 — and heads up, these all live in the kernel file ./tools/perf/util/dwarf-aux.c:

ngl bestie, remember the two gotchas: unions only ever hand you the first matching member, and anything that isn't a struct returns the type directly only when it's within the size of the type — otherwise you're getting NULL. 🔥

ok that's the whole page, you ate that 🍓 mwah 💋 — this one's from ./tools/perf/util, dated October 2026, and it's filed under die_get_member_type(9). go forth and DWARF, icon 🧚✨

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