FUNCTION::UBACKTRACE(3stap)

✨ NAME ✨

function::ubacktrace — it's giving hex backtrace of the current user-space task stack, bestie 💅

(also hi, this is a section-3stap situation, for the record 👑

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🦋 SYNOPSIS 🦋

ubacktrace:string()

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🎀 ARGUMENTS 🎀

None. Nada. Zero. It takes no arguments, she just works 💖

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🌸 DESCRIPTION 🌸

Okay so here's the tea: ubacktrace returns you a string of hex addresses that are a backtrace of the stack of the current task. That's it, that's the whole vibe — a cute lil hex trail of where you've been 🫶

Heads up though: the output may be truncated as per maximum string length. So don't come crying if it cuts off mid-vibe, that's just the max string length doing its thing 😭

And if the current probe point can't figure out the user backtrace? You get an empty string. Nothing. Ghosted. 💀

Oh and if what you actually wanted was a kernel traceback, that's a different girl — go see backtrace for that one, iykyk ✨

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👑 NOTE 👑

Wanna get (full) backtraces for user space applications and shared shared libraries that aren't mentioned in the current script? Bet. You gotta run stap with:

-d /path/to/exe-or-so

and/or add --ldd to load all the needed unwind data 🌈

Like, do both if you're feeling extra. It's giving "main character energy" and honestly? Periodt.

fr fr bestie, if your backtrace is looking sus and truncated, this is the first thing to check 🙈

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💜 SEE ALSO 💜

• tapset::ucontext-unwind(3stap)

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SystemTap Tapset Reference — that's the source, the version, all of it 💫 and the date on this one is September 2026, so yeah, she's from the future and she ate 🔥

okay bye bestie, go unwind some stacks 💖🧚🎀