Provided by: systemtap-doc_3.1-3ubuntu0.1_all 

NAME
probe::json_data - Fires whenever JSON data is wanted by a reader.
SYNOPSIS
json_data
VALUES
None
CONTEXT
This probe fires when the JSON data is about to be read. This probe must gather up data and then call the
following macros to output the data in JSON format. First, @json_output_data_start must be called. That
call is followed by one or more of the following (one call for each data item):
@json_output_string_value, @json_output_numeric_value, @json_output_array_string_value, and
@json_output_array_numeric_value. Finally @json_output_data_end must be called.
SEE ALSO
tapset::json(3stap)
SystemTap Tapset Reference March 2016 PROBE::JSON_DATA(3stap)