DWARF_ADD_DIE_TO_DEBUG(3)

📦 version 15.1, in freebsd 14.5, freebsd 15.1, nixpkgs unstable

🌈 DWARF_ADD_DIE_TO_DEBUG(3) — like, the libdwarf page where we set the root DIE 💅

okay bestie, welcome to DWARF_ADD_DIE_TO_DEBUG(3), a page from the Library Functions Manual section. yes the manpage name really is yelling at you in all caps, that's just how these things are. sit down, grab a strawberry 🍓, and let's talk about giving your DWARF producer instance a root debugging information entry. it's giving main character energy for your whole DIE tree, no cap.

✨ NAME ✨

dwarf_add_die_to_debug — sets the root debugging information entry. that's it, that's the job. 🎀

📚 LIBRARY 📚

DWARF Access Library (libdwarf, -ldwarf). yeah you gotta link the thing, -ldwarf, periodt.

🧚 SYNOPSIS 🧚

#include <libdwarf.h>

Dwarf_Unsigned
dwarf_add_die_to_debug(Dwarf_P_Debug dbg, Dwarf_P_Die first_die,
    Dwarf_Error *err);

look at her. three arguments, one Dwarf_Unsigned return. iconic.

💖 DESCRIPTION 💖

so, function dwarf_add_die_to_debug() sets the root debugging information entry of a DWARF producer instance. and here's the cute part — every single debugging information entry linked to that root entry gets added to the producer instance too. like, the whole friend group comes along. the way that works is genuinely so satisfying ngl. 🫶

Argument dbg should reference a DWARF producer instance, and you gotta have allocated it using dwarf_producer_init(3) or dwarf_producer_init_b(3). no random dbg from the street, bestie, it has to come from one of those two. ✨

Argument first_die should hold the debugging information entry that will become the root DIE. she's the root now. crown her. 👑

If argument err is not NULL, it will be used to store error information in case of an error. if it is NULL... well, then it won't be. your call, but like, maybe pass one? 🙈

🦋 RETURN VALUES 🦋

On success, function dwarf_add_die_to_debug() returns DW_DLV_OK. slay. ✅

In case of an error, function dwarf_add_die_to_debug() returns DW_DLV_NOCOUNT and sets the argument err. and yes, that's literally what it says — DW_DLV_NOCOUNT on error, not the DW_DLV_ERROR you were probably expecting. don't @ me, I don't write the library, I just report the facts fr fr. 😭

💀 ERRORS 💀

Function dwarf_add_die_to_debug() can fail with:

  • [DW_DLE_ARGUMENT] — either of the arguments dbg or first_die was NULL. yep, one of them was a whole void. not the vibe. 🫠

👀 SEE ALSO 👀

go read them, they're all right there, iykyk 🌸

aaaand that's the page!! 💜 this one came from Debian, dated August 21, 2011, and it lives at DWARF_ADD_DIE_TO_DEBUG(3) in the Library Functions Manual. take care of her, link your debug info properly, and don't forget to pass err — mwah 💋🎀

📦 where this page comes from