Class: Evilution::Isolation::Fork

Inherits:
Object
  • Object
show all
Defined in:
lib/evilution/isolation/fork.rb

Constant Summary collapse

GRACE_PERIOD = 
2

Instance Method Summary collapse

Constructor Details

#initialize(hooks: nil) ⇒ Fork

Returns a new instance of Fork.



15
16
17
 
# File 'lib/evilution/isolation/fork.rb', line 15

def initialize(hooks: nil)
  @hooks = hooks
end

Instance Method Details

#call(mutation:, test_command:, timeout:) ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/evilution/isolation/fork.rb', line 19

def call(mutation:, test_command:, timeout:)
  pid = nil
  sandbox_dir = Dir.mktmpdir("evilution-run")
  start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  parent_rss = Evilution::Memory.rss_kb
  read_io, write_io = IO.pipe
  # Marshal result payload is ASCII-8BIT; pipes default to text mode and may
  # transcode according to their external/internal encodings (influenced by
  # Encoding.default_external and/or Encoding.default_internal — Rails sets
  # the latter to UTF-8), failing on bytes with no mapping. Force binmode on
  # both ends.
  read_io.binmode
  write_io.binmode

  pid = ::Process.fork do
    ENV["TMPDIR"] = sandbox_dir
    read_io.close
    suppress_child_output
    @hooks.fire(:worker_process_start, mutation: mutation) if @hooks
    result = execute_in_child(mutation, test_command)
    Marshal.dump(result, write_io)
    write_io.close
    exit!(result[:passed] ? 0 : 1)
  end

  write_io.close
  result = wait_for_result(pid, read_io, timeout)
  duration = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start_time

  build_mutation_result(mutation, result, duration, parent_rss)
ensure
  read_io&.close
  write_io&.close
  ensure_reaped(pid)
  restore_original_source
  FileUtils.rm_rf(sandbox_dir) if sandbox_dir
end