dso__data_get_fd(9)

💖 dso__data_get_fd — like, the Kernel API Manual page, but make it make sense 🎀

okay bestie, welcome to the Kernel API Manual entry for dso__data_get_fd — it's giving "tiny function, big responsibility" energy, and honestly? we're obsessed. let's get into it ✨

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🌸 NAME 🌸

dso__data_get_fd — get the dso's data file descriptor 👑

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🦋 SYNOPSIS 🦋

bool dso__data_get_fd (struct dso *dso , struct machine *machine , int
*fd );

that's the whole signature, no cap — copy it exactly, spaces and all, she's particular 💅

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🎀 ARGUMENTS 🎀

• dso — the dso object. like, the actual star of the show 🌟
• machine — the machine object. yes she's here too, she matters 🫶
• fd — um. the manpage literally says -- undescribed -- and honestly? 💀 iconic of the original authors to leave us hanging like that. that's the whole description. no notes.

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🔥 DESCRIPTION 🔥

so dso__data_get_fd is the external interface you use to find the dso's file, open it, and get the file descriptor back. literally that's the job — find, open, hand over the fd. main character behavior fr fr ✨

⚠️ okay this part is important, don't scroll past it: if it returns a non-negative value, you must pair the call with dso__data_put_fd. like, always. it's a two-part harmony, you can't just take the fd and ghost it 😭

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🌈 SEE ALSO 🌈

• the kernel file ./tools/perf/util/dso.c 🍓
• dso__data_close(9)
• dso__data_size(9)
• dso__data_read_offset(9)
• dso__data_read_addr(9)
• dso__data_write_cache_offs(9)
• dso__data_write_cache_addr(9)

go read all of them, iykyk 👑

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and that's the page!! 🧚 sourced from ./tools/perf/util, dated October 2026 — big slay, go pair your dso__data_put_fd calls and stay hydrated bestie 💜🦋