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# frozen_string_literal: true
module MemoryProfiler
class Helpers
def initialize
@gem_guess_cache = Hash.new
@location_cache = Hash.new { |h, k| h[k] = Hash.new.compare_by_identity }
@string_cache = Hash.new
end
def guess_gem(path)
@gem_guess_cache[path] ||=
if /(\/gems\/.*)*\/gems\/(?<gemname>[^\/]+)/ =~ path
gemname
elsif /\/rubygems[\.\/]/ =~ path
"rubygems"
elsif /ruby\/\d\.[^\/]+\/(?<stdlib>[^\/\.]+)/ =~ path
stdlib
elsif /(?<app>[^\/]+\/(bin|app|lib))/ =~ path
app
else
"other"
end
end
def lookup_location(file, line)
@location_cache[file][line] ||= "#{file}:#{line}"
end
KERNEL_CLASS_METHOD = Kernel.instance_method(:class)
def object_class(obj)
klass = obj.class rescue nil
unless Class === klass
# attempt to determine the true Class when .class returns something other than a Class
klass = KERNEL_CLASS_METHOD.bind_call(obj)
end
klass
end
def lookup_class_name(klass)
((klass.is_a?(Class) && klass.name) || '<<Unknown>>').to_s
end
def lookup_string(obj)
# This string is shortened to 200 characters which is what the string report shows
# The string report can still list unique strings longer than 200 characters
# separately because the object_id of the shortened string will be different
@string_cache[obj] ||= String.new << obj[0, 200]
end
end
end
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