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Defined Under Namespace

Classes: String

Instance Method Summary collapse

Instance Method Details

#format(obj) ⇒ Object 



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# File 'lib/straces.rb', line 97

def format(obj)
  [
    obj[:time].round(4).to_s.ljust(6, "0"),
    obj[:timing].round(6).to_s.ljust(8, "0"),
    obj[:call].ljust(16),
    obj[:middle],
  ].join(" ")
end

#process(lines, syscalls_ignored, syscalls_focused) ⇒ Object 



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# File 'lib/straces.rb', line 76

def process(lines, syscalls_ignored, syscalls_focused)
  last_obj = {
    time: 0.0
  }

  objs = lines.map do |line|
    obj = strace_parse(line)
    next unless obj

    if syscalls_focused.length > 0
      next unless syscalls_focused.include? obj[:call]
    end
    next if syscalls_ignored.include? obj[:call]

    obj[:time] = obj[:timing] + last_obj[:time]
    last_obj = obj
    obj
  end
  objs.compact
end

#strace_parse(line) ⇒ Object 



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# File 'lib/straces.rb', line 40

def strace_parse(line)
  return nil if line.end_with? "<unfinished ...>"
  return nil if line.end_with? "resumed>)      = ?"
  return nil if line.end_with? "+++ exited with 0 +++"
  # accept4(3,
  return nil if line.end_with? ", "
  return nil if line.end_with? "<detached ...>"

  p line if ENV['STRACES_DEBUG'] == "yes"

  matcher = line.match /^(?<pid>\d*)\s?(?<time>\d\d:\d\d:\d\d\.?\d*)?\s?(?<interrupted>\<\.\.\.)?(?<call>[^\(]+)(?<middle>.*)?\<(?<timing>\d+\.\d+)\>$/

  #63796 11:18:12 clock_gettime(CLOCK_MONOTONIC, {tv_sec=27510, tv_nsec=693534954}) = 0 <0.000108>
  #63796 11:18:12 <... clock_gettime resumed> {tv_sec=27510, tv_nsec=648632454}) = 0 <0.000356>

  call, middle = if matcher[:interrupted]
    syscall, rest = matcher[:call].split(" ")
    [syscall, rest]
  else
    [matcher[:call], matcher[:middle]]
  end

  timing = Float matcher[:timing] rescue 0.0

  if matcher
    {
      pid: matcher[:pid],
      call: call,
      middle: middle,
      timing: timing
    }
  else
    nil
  end
end