TAPSET::JSON(3stap)

💖 NAME 💖

okay bestie, so tapset::json is the systemtap json tapset — it's giving JSON generation, main character energy, and it's here to serve ✨ (this is from the SystemTap Tapset Reference, btw 🫶)

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🦋 DESCRIPTION 🦋

So the JSON tapset hands you probes, functions, and macros so you can generate a JSON metadata file and a JSON data file. Two files, both iconic, no cap 💅

• the JSON metadata file lives at /proc/systemtap/MODULE/metadata.json
• the JSON data file lives at /proc/systemtap/MODULE/data.json

and listen — the JSON data file gets updated with the current data every single time the file is read. like, every read. fresh data, periodt 🔥

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✨ the roster ✨

json_set_prefix

Set the metric prefix.

See function::json_set_prefix(3stap) for details. 🌸

json_add_numeric_metric

Add a numeric metric.

See function::json_add_numeric_metric(3stap) for details. 🌸

json_add_string_metric

Add a string metric.

See function::json_add_string_metric(3stap) for details. 🌸

json_add_array

Add an array.

See function::json_add_array(3stap) for details. 🌸

json_add_array_numeric_metric

Add a numeric metric to an array.

See function::json_add_array_numeric_metric(3stap) for details. 🌸

json_add_array_string_metric

Add a string metric to an array.

See function::json_add_array_string_metric(3stap) for details. 🌸

json_data

Fires whenever JSON data is wanted by a reader.

See probe::json_data(3stap) for details. 🌈

@json_output_data_start

Start the json output.

See macro::json_output_data_start(3stap) for details. 🎀

@json_output_string_value

Output a string value.

See macro::json_output_string_value(3stap) for details. 🎀

@json_output_numeric_value

Output a numeric value.

See macro::json_output_numeric_value(3stap) for details. 🎀

@json_output_array_string_value

Output a string value for metric in an array.

See macro::json_output_array_string_value(3stap) for details. 🎀

@json_output_array_numeric_value

Output a numeric value for metric in an array.

See macro::json_output_array_numeric_value(3stap) for details. 🎀

@json_output_data_end

End the json output.

See macro::json_output_data_end(3stap) for details. 🎀

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👑 SEE ALSO 👑

the whole friend group, all linked up, iykyk 💜

• function::json_set_prefix(3stap)
• function::json_add_numeric_metric(3stap)
• function::json_add_string_metric(3stap)
• function::json_add_array(3stap)
• function::json_add_array_numeric_metric(3stap)
• function::json_add_array_string_metric(3stap)
• probe::json_data(3stap)
• macro::json_output_data_start(3stap)
• macro::json_output_string_value(3stap)
• macro::json_output_numeric_value(3stap)
• macro::json_output_array_string_value(3stap)
• macro::json_output_array_numeric_value(3stap)
• macro::json_output_data_end(3stap)
• stap(1)
• stapprobes(3stap)

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okay that's the whole page, mwah 💋 this was the SystemTap Tapset Reference, dated September 2026, and it's literally titled TAPSET::JSON(3stap) — slay, bye bestie 🫶✨