UNW_REGNAME(3libunwind)

💖 unw_regname — get register name 💖

okay bestie, welcome to the 3libunwind corner of the manual, the part where we look at a register and go "what's your name, gorgeous?" 🎀 this whole page lives in the Programming Library section and it's literally one function, so we can be besties about it real quick.

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✨ NAME ✨

unw_regname — get register name 🫶

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🌸 SYNOPSIS 🌸

#include <libunwind.h>

const char *unw_regname(unw_regnum_t regnum);

like, that's it. that's the whole vibe. one include, one call. 💅

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🦋 DESCRIPTION 🦋

so the unw_regname() routine returns a printable name for the register regnum. that's the whole job. you hand it a register number, it hands you back a name you can actually print. iconic behaviour honestly.

and if regnum is an invalid or otherwise unrecognized register number, you don't get nothing and you don't get a crash — you get a string made of three question marks. so it's giving "???" which, mood, but also very informative. 🧚

the returned string is statically allocated, which means it's guaranteed to stay valid until the application terminates. no freeing, no copying, no stressing. it just lives there forever like a little ghost. 👑

⚠️ note bestie: because it's statically allocated, don't go trying to free() it. the string is not yours to manage, it's the library's. it stays valid until the app terminates, periodt.

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⭐ RETURN VALUE ⭐

the unw_regname() routine cannot fail and always returns a valid (non-NULL) string. like, it literally does not know how to fail. main character energy fr fr. 🔥

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🌈 THREAD AND SIGNAL SAFETY 🌈

the unw_regname() routine is thread safe as well as safe to use from a signal handler. so yes you can call it from all your threads, and yes you can call it from inside a signal handler, and no it will not betray you. we love a low-drama function. 💜

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👑 SEE ALSO 👑

• libunwind(3libunwind) — the whole family, go say hi 🫶

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💌 AUTHOR 💌

David Mosberger-Tang Email: dmosberger@gmail.com WWW: http://www.nongnu.org/libunwind/

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and that's the page, bestie!! 🌸 this was the unw_regname(3libunwind) page from the Programming Library manual, dated 29 August 2023, and you have officially read the entire thing. slay. go name some registers. 💅✨