PROBE::SIGNAL.SYS_(3stap)

💅 PROBE::SIGNAL.SYS_(3stap) — the Signal Tapset girlies know

okay so bestie, welcome to the Signal Tapset section of the SystemTap manual — this one's about probe::signal.sys_tkill, and it's lowkey iconic. let's get into it 🫶

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✨ NAME ✨

probe::signal.sys_tkill — sending a kill signal to a thread. yes, like that kind of kill. very main character energy 🔥

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🎀 SYNOPSIS 🎀

probe signal.sys_tkill {}

that's it. that's the whole vibe. one probe, no args, no drama 💅

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🌸 VALUES 🌸

these are the lil variables you get handed when the probe fires, and ngl they're all useful:

• sig_pid — the PID of the process that's receiving the kill signal. the target, the recipient, the one getting the notif 😭
• sig_name — a string representation of the signal. so like, the signal's name but as text, fr fr
• name — the name of the probe point. it's giving "hello, this is me" 🎀
• task — a task handle to the signal recipient. your little pointer to whoever's getting the signal 💖
• pid_name — the name of the signal recipient. the who of the whole situation
• sig — the specific signal sent to the process. the actual number, the real deal ⭐

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🦋 DESCRIPTION 🦋

so the tkill call is basically analogous to kill(2) — same energy, same family — except it also lets you target a process within a specific thread group. and the way you do that is through their unique thread IDs, aka TIDs. not the PID, bestie, the TID. important distinction, don't mix them up 🙈

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👑 SEE ALSO 👑

• tapset::signal(3stap)

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and that's the whole page, you ate it 💅 this was the SystemTap Tapset Reference, September 2026 edition — go forth and probe responsibly, bestie 🦋✨💖