trace_point_debugging

🕵️‍♂️ Instrument Code with TracePoint

TracePoint provides hooks into Ruby’s execution engine, letting you trace line events, method calls, class definitions, and more. Use it to build profilers, debuggers, or runtime analyzers without external gems.

trace = TracePoint.new(:call, :return) do |tp|
  puts "#{tp.event} -> #{tp.defined_class}##{tp.method_id} at #{tp.path}:#{tp.lineno}"
end

trace.enable
[1,2,3].map { |n| n * 2 }
trace.disable