synth_event_trace(9)

📦 version 7.3.1, in nixpkgs unstable

💜 synth_event_trace(9) — it's giving kernel API realness

okay so bestie, you found a page from the Kernel API Manual and honestly? it's a whole vibe. this one's called synth_event_trace and it's about tracing synthetic events, no cap.

✨ NAME ✨

synth_event_trace — Trace a synthetic event 🦋

✨ SYNOPSIS ✨

int synth_event_trace (struct trace_event_file *file , unsigned int
n_vals , ... );

like, literally that's the signature, copy it exactly, don't @ me 💅

✨ ARGUMENTS ✨

  • file — the trace_event_file that reps the synthetic event. it's the main character here 👑
  • n_vals — the number of values in vals
  • ... — a variable number of args holding the event values. yes, varargs, she's flexible like that ✨

✨ DESCRIPTION ✨

so the whole point: you're tracing a synthetic event using the values you pass in through the variable argument list. 🎀

the argument list should be a list of 'n_vals' u64 values. and listen — the number of vals must match the number of fields in the synthetic event, and they must be in the same order as the synthetic event fields. no shuffling, no vibes-based ordering, fr fr. 🔥

all vals should be cast to u64, and string vals are just pointers to strings, cast to u64. the strings get copied into space reserved in the event for the string, using these pointers. so you're not sneaking a literal string in there, you're passing a pointer, cast to u64, periodt. 💅

ngl this is the kind of function where if you get the field count or the order wrong, it's not gonna be iconic. match the fields. match the order. that's the vibe check. 🫶

✨ RETURN ✨

0 on success, err otherwise. that's it, that's the whole return story 😭

✨ SEE ALSO ✨

like the whole synth event friend group showed up to the group chat 🌸

okay that's the page!! this one came from ./kernel/trace and it's dated October 2026, page synth_event_trace(9). mwah, go trace something iconic bestie 💖🎀🧚

📦 where this page comes from