function::thread_indent_depth - returns the nested-depth of the current task

delta
           the amount of depth added/removed for each call

       This function returns an integer equal to the nested function-call depth starting from the outermost
       initial level. This function is useful for saving space (consumed by whitespace) in traces with long
       nested function calls. Use this function in a similar fashion to thread_indent, i.e., in call-probe, use
       thread_indent_depth(1) and in return-probe, use thread_indent_depth(-1)

       function::thread_indent_depth - returns the nested-depth of the current task

tapset::indent(3stap)

SystemTap Tapset Reference                         April 2024                        FUNCTION::THREAD_IND(3stap)

           thread_indent_depth:long(delta:long)