synth_event_add_field_str(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 synth_event_add_field_str — Kernel API Manual ✨

okay bestie, so this whole page is about synth_event_add_field_str, and it lives in the Kernel API Manual (yes, the whole manual is a vibe). Let me break it down for you 💅

🎀 NAME 🎀

synth_event_add_field_str — adds a shiny new field to a synthetic event cmd. that's literally it, that's the whole job 🫶

✨ SYNOPSIS ✨

int synth_event_add_field_str (struct dynevent_cmd *cmd , const char
*type_name );

look at her go 😭 a whole int, two args, no notes.

🦋 ARGUMENTS 🦋

  • cmd — a pointer to the dynevent_cmd struct that represents your brand new event. this is the main character of the operation fr.
  • type_name — the type and the name of the new field you're adding, all smooshed together as one single string. like, both of them. in one string. iykyk 💖

🌈 DESCRIPTION 🌈

so you're adding a new field to a synthetic event cmd object — and you're doing it as a single string, hence the _str at the end of her name, she's iconic like that 👑

the type_name string is expected to be in the form 'type name', and the system will append a ';' onto it for you. cute, right? 🎀

🚨 heads up bestie: there is no sanity checking happening here. zero. none. what you pass in is just assumed to already be well-formed. so if you hand her a cursed string, that's on you, not her. be careful 🙈

field ordering? it's in the exact same order that the fields were added. no reshuffling, no alphabetising, no surprises 💅

if you wanna know what types are actually available, go check out synth_field_size — she's got the full roster ⭐

and ooh, one more thing: if field_name contains [n], the field gets treated as an array. noted 📝

🔥 RETURN 🔥

  • 0 if it worked — slay, we love a success ✨
  • error otherwise — not slay, but at least you know 😭

💜 SEE ALSO 💜

the kernel file, obviously — ./kernel/trace/trace_events_synth.c 🧚

and the whole friend group of related functions:

okay that's the whole page, and the lore is: this gem lives in ./kernel/trace, dated October 2026, and it's filed under synth_event_add_field_str(9). go forth and add your fields, bestie — mwah 💋💖🌸

📦 where this page comes from