FUNCTION::PRINT_USTA(3stap)

✨ FUNCTION::PRINT_USTA ✨

okay bestie, we're diving into the Context Functions chapter of the SystemTap Tapset Reference (yes it's 3stap, the manual section, keep up 💅) and today's main character is print_ustack. she's lowkey iconic, highkey niche. let's go 🦋

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🌸 NAME 🌸

function::print_ustack — bestie, she prints out the stack for the current task, but from a string. that's the whole vibe. 💖

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🎀 SYNOPSIS 🎀

print_ustack(stk:string)

that's it. one arg. no drama. periodt. ✨

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🌈 ARGUMENTS 🌈

• stk — a string holding a list of hexadecimal addresses, and those addresses belong to the current task. like, the task you're literally inside right now. that's the one. 🫶

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👑 DESCRIPTION 👑

so here's the tea ☕: print_ustack does a symbolic lookup on the addresses sitting in that string you just handed her. and where did that string come from, you ask? it's assumed to be the result of a prior call to ubacktrace for the current task. so like, ubacktrace first, then this one. in that order. no cap. 🙈

then she prints one line per address, and each of those lines gives you:

• the address itself 📍
• the name of the function that contains that address 🔎
• and an estimate of its position within that function 🎯

and after all that? she returns nothing. absolutely nothing. she's giving, she's slaying, and then she just… leaves. no return value. not even a little one. 💀

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⚠️ NOTE ⚠️

okay so real talk bestie — it is recommended to use print_usyms instead of this function. not me telling you to switch but like. i'm telling you to switch. 😭

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💜 SEE ALSO 💜

• tapset::ucontext-symbols(3stap) — go read this one too, iykyk 🌟

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that's the whole page bestie, you ate it up fr fr 🍓✨ this was SystemTap Tapset Reference, version vibes from September 2026 — now go forth and print those stacks, queen 👑💖