FUNCTION::USTACK(3stap)

✨ NAME ✨

okay so bestie, welcome to FUNCTION::USTACK from the 3stap manual, section 3 🎀

• function::ustack — returns the address at a given depth of a user stack backtrace. it's giving "who called me and from WHERE" 💅

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🌸 SYNOPSIS 🌸

ustack:long(n:long)

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🫶 ARGUMENTS 🫶

• n — how many levels to descend into the stack. like, 0 is right there at the top and you keep going down, down, down 🦋

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💖 DESCRIPTION 💖

so what it does is: it performs a simple backtrace, in user space specifically, and then hands you back the element sitting at the position you asked for. lowkey iconic ✨

and here's the slay part: the results of the backtrace itself are cached 🧚 so the actual backtrace computation gets performed at most once, no matter how many times you call ustack, or in what order you call it. so go off, call it a hundred times, the machine is not stressed about it 💅

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👑 SEE ALSO 👑

• tapset::ucontext-symbols(3stap)

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that's the whole vibe fr fr 💜 this was the SystemTap Tapset Reference, version Ver, dated September 2026 — stay hydrated, read your tapset docs, and remember: the stack remembers everything 🌈💖