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require "helper"
class TestMemoryLeak < Nokogiri::TestCase
def setup
super
@str = <<EOF
<!DOCTYPE HTML>
<html>
<body>
<br />
</body>
</html>
EOF
end
#
# this suite is turned off unless the env var NOKOGIRI_GC is non-nil
#
# to run any of these tests, do something like this on the commandline:
#
# $ NOKOGIRI_GC=t ruby -Ilib:test \
# test/test_memory_leak.rb \
# -n /test_leaking_namespace_node_strings/
#
# also see:
#
# https://github.com/sparklemotion/nokogiri/issues/1603
#
# which is an open issue to resurrect these tests and run them as
# part of the CI pipeline.
#
if ENV['NOKOGIRI_GC'] # turning these off by default for now
def test_dont_hurt_em_why
content = File.open("#{File.dirname(__FILE__)}/files/dont_hurt_em_why.xml").read
ndoc = Nokogiri::XML(content)
2.times do
ndoc.search('status text').first.inner_text
ndoc.search('user name').first.inner_text
GC.start
end
end
class BadIO
def read(*args)
raise 'hell'
end
def write(*args)
raise 'chickens'
end
end
def test_for_mem_leak_on_io_callbacks
io = File.open SNUGGLES_FILE
Nokogiri::XML.parse(io)
loop do
Nokogiri::XML.parse(BadIO.new) rescue nil
doc.write BadIO.new rescue nil
end
end
def test_for_memory_leak
begin
# we don't use Dike in any tests, but requiring it has side effects
# that can create memory leaks, and that's what we're testing for.
require 'rubygems'
require 'dike' # do not remove!
count_start = count_object_space_documents
xml_data = <<-EOS
<test>
<items>
<item>abc</item>
<item>1234</item>
<item>Zzz</item>
<items>
</test>
EOS
20.times do
doc = Nokogiri::XML(xml_data)
doc.xpath("//item")
end
2.times { GC.start }
count_end = count_object_space_documents
assert((count_end - count_start) <= 2, "memory leak detected")
rescue LoadError
puts "\ndike is not installed, skipping memory leak test"
end
end
def test_node_set_namespace_mem_leak
xml = Nokogiri::XML "<foo></foo>"
ctx = Nokogiri::XML::XPathContext.new(xml)
loop do
ctx.evaluate("//namespace::*")
end
end
def test_leak_on_node_replace
loop do
doc = Nokogiri.XML("<root><foo /></root>")
n = Nokogiri::XML::CDATA.new(doc, "bar")
pivot = doc.root.children[0]
pivot.replace(n)
end
end
def test_sax_parser_context
io = StringIO.new(@str)
loop do
Nokogiri::XML::SAX::ParserContext.new(@str)
Nokogiri::XML::SAX::ParserContext.new(io)
io.rewind
Nokogiri::HTML::SAX::ParserContext.new(@str)
Nokogiri::HTML::SAX::ParserContext.new(io)
io.rewind
end
end
class JumpingSaxHandler < Nokogiri::XML::SAX::Document
def initialize(jumptag)
@jumptag = jumptag
super()
end
def start_element(name, attrs = [])
throw @jumptag
end
end
def test_jumping_sax_handler
doc = JumpingSaxHandler.new(:foo)
loop do
catch(:foo) do
Nokogiri::HTML::SAX::Parser.new(doc).parse(@str)
end
end
end
def test_in_context_parser_leak
loop do
doc = Nokogiri::XML::Document.new
fragment1 = Nokogiri::XML::DocumentFragment.new(doc, '<foo/>')
node = fragment1.children[0]
node.parse('<bar></bar>')
end
end
def test_in_context_parser_leak_ii
loop { Nokogiri::XML('<a/>').root.parse('<b/>') }
end
def test_leak_on_xpath_string_function
doc = Nokogiri::XML(@str)
loop do
doc.xpath('name(//node())')
end
end
def test_leaking_namespace_node_strings
# see https://github.com/sparklemotion/nokogiri/issues/1810 for memory leak report
ns = {'xmlns' => 'http://schemas.xmlsoap.org/soap/envelope/'}
20.times do
10_000.times do
Nokogiri::XML::Builder.new do |xml|
xml.send 'Envelope', ns do
xml.send 'Foobar', ns
end
end
end
puts MemInfo.rss
end
end
def test_leaking_namespace_node_strings_with_prefix
# see https://github.com/sparklemotion/nokogiri/issues/1810 for memory leak report
ns = {'xmlns:foo' => 'http://schemas.xmlsoap.org/soap/envelope/'}
20.times do
10_000.times do
Nokogiri::XML::Builder.new do |xml|
xml.send 'Envelope', ns do
xml.send 'Foobar', ns
end
end
end
puts MemInfo.rss
end
end
def test_leaking_dtd_nodes_after_internal_subset_removal
# see https://github.com/sparklemotion/nokogiri/issues/1784
100_000.times do |i|
doc = Nokogiri::HTML::Document.new
doc.internal_subset.remove
puts MemInfo.rss if (i % 1000 == 0)
end
end
describe "#2114 RelaxNG schema parsing has a small memory leak" do
it "no longer leaks" do
prev_rss = MemInfo.rss
100_001.times do |j|
Nokogiri::XML::RelaxNG.from_document(Nokogiri::XML::Document.parse(File.read(ADDRESS_SCHEMA_FILE)))
if (j % 10_000 == 0)
curr_rss = MemInfo.rss
diff_rss = curr_rss - prev_rss
printf("\n(iter %d) %d", j, curr_rss)
printf(" (%s%d)", diff_rss >= 0 ? "+" : "-", diff_rss) if j > 0
prev_rss = curr_rss
end
end
puts
end
end
end # if NOKOGIRI_GC
module MemInfo
# from https://stackoverflow.com/questions/7220896/get-current-ruby-process-memory-usage
# this is only going to work on linux
PAGE_SIZE = `getconf PAGESIZE`.chomp.to_i rescue 4096
STATM_PATH = "/proc/#{Process.pid}/statm"
STATM_FOUND = File.exist?(STATM_PATH)
def self.rss
if STATM_FOUND
return (File.read(STATM_PATH).split(' ')[1].to_i * PAGE_SIZE) / 1024
end
return 0
end
end
private
def count_object_space_documents
count = 0
ObjectSpace.each_object {|j| count += 1 if j.is_a?(Nokogiri::XML::Document) }
count
end
end
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