Class: LeakProfiler::Allocations

Inherits:
Object
  • Object
show all
Defined in:
lib/leak_profiler/allocations.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(logger:, interval:, max_allocations:, max_referrers:, max_sample_objects:) ⇒ Allocations

Returns a new instance of Allocations.



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# File 'lib/leak_profiler/allocations.rb', line 19

def initialize(logger:, interval:, max_allocations:, max_referrers:, max_sample_objects:)
  @logger = logger
  @interval = interval
  @max_allocations = max_allocations
  @max_referrers = max_referrers
  @max_sample_objects = max_sample_objects
end

Instance Attribute Details

#thread ⇒ Object (readonly)

Returns the value of attribute thread.



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# File 'lib/leak_profiler/allocations.rb', line 13

def thread
  @thread
end

Instance Method Details

#report ⇒ Object 



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# File 'lib/leak_profiler/allocations.rb', line 27

def report
  @thread = Thread.start do
    loop do
      ObjectSpace.trace_object_allocations_start
      sleep(@interval)
      ObjectSpace.trace_object_allocations_stop

      allocations = Hash.new { |h, k| h[k] = {} }
      allocations_by_class = Hash.new { |h, k| h[k] = 0 }

      ObjectSpace.each_object.each do |obj|
        begin
          klass = obj_class(obj)
          allocations_by_class[klass] += ObjectSpace.memsize_of(obj)
        rescue StandardError
        end

        key = allocated_location(obj)
        allocations[key][:metrics] ||= Hash.new { |h, k| h[k] = 0 }
        allocations[key][:metrics][:count] += 1
        allocations[key][:metrics][:bytes] += ObjectSpace.memsize_of(obj)

        allocations[key][:sample_objects] ||= []
        allocations[key][:sample_objects] << obj
      end

      allocations.each_value do |v|
        v[:sample_objects] = v[:sample_objects].sample(@max_sample_objects)
      end

      report_allocations_class(allocations_by_class)
      report_allocations(allocations)
      report_referrer_objects(allocations)

      allocations.each_value(&:clear)
      allocations.clear
      allocations_by_class.clear
    rescue StandardError => e
      @logger.add(Logger::Severity::ERROR, "Error occurred: #{e.message}, backtrace: #{e.backtrace.join("\n")}")
    end
  end
end