Class: MemoryProfiler::Reporter

Inherits:
Object
  • Object
show all
Defined in:
lib/memory_profiler/reporter.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.report(top = 50, &block) ⇒ Object 



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# File 'lib/memory_profiler/reporter.rb', line 5

def self.report(top=50, &block)
  report = self.new
  report.run(top,&block)
end

Instance Method Details

#object_list(generation, rvalue_size) ⇒ Object 



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# File 'lib/memory_profiler/reporter.rb', line 48

def object_list(generation, rvalue_size)
  results = StatHash.new
  objs = []

  ObjectSpace.each_object do |obj|
    objs << obj
  end

  objs.each do |obj|
    if generation == ObjectSpace.allocation_generation(obj)
      file = ObjectSpace.allocation_sourcefile(obj)
      unless file == __FILE__
        line = ObjectSpace.allocation_sourceline(obj)
        class_path = ObjectSpace.allocation_class_path(obj)
        method_id = ObjectSpace.allocation_method_id(obj)

        class_name = obj.class.name rescue "BasicObject"
        begin
          object_id = obj.__id__

          memsize = ObjectSpace.memsize_of(obj) + rvalue_size
          # compensate for API bug
          memsize = rvalue_size if memsize > 100_000_000_000
          results[object_id] = Stat.new(class_name, file, line, class_path, method_id, memsize)
        rescue
          # __id__ is not defined, give up
        end
      end
    end
  end

  results
end

#run(top = 50, &block) ⇒ Object 



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# File 'lib/memory_profiler/reporter.rb', line 10

def run(top=50,&block)
  allocated, rvalue_size = nil

  # calcualte RVALUE
  GC::Profiler.enable
  Helpers.full_gc
  begin
    data = GC::Profiler.raw_data[0]
    # so hacky, but no other way
    rvalue_size = data[:HEAP_TOTAL_SIZE] / data[:HEAP_TOTAL_OBJECTS]
    GC::Profiler.disable
  end
  GC.disable

  ObjectSpace.trace_object_allocations do
    generation = GC.count
    block.call
    allocated = object_list(generation, rvalue_size)
  end

  GC.enable

  Helpers.full_gc

  retained = StatHash.new
  ObjectSpace.each_object do |obj|
    begin
      found = allocated[obj.__id__]
      retained[obj.__id__] = found if found
    rescue
      # __id__ is not defined, skip it
    end
  end

  Results.from_raw(allocated,retained,top)

end