Module: Sigdump

Defined in:
lib/sigdump.rb

Constant Summary collapse

VERSION = 
"0.1.0"

Class Method Summary collapse

Class Method Details

._fn(num) ⇒ Object 



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# File 'lib/sigdump.rb', line 78

def self._fn(num)
  s = num.to_s
  if formatted = s.gsub!(/(\d)(?=(?:\d{3})+(?!\d))/, "\\1,")
    formatted
  else
    s
  end
end

._open_dump_path(path, &block) ⇒ Object 



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# File 'lib/sigdump.rb', line 87

def self._open_dump_path(path, &block)
  case path
  when nil, ""
    path = "/tmp/sigdump-#{Process.pid}.log"
    File.open(path, "a", &block)
  when IO
    yield path
  when "-"
    yield STDIN
  when "+"
    yield STDERR
  else
    File.open(path, "a", &block)
  end
end

.dump_all_thread_backtrace(io) ⇒ Object 



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# File 'lib/sigdump.rb', line 17

def self.dump_all_thread_backtrace(io)
  Thread.list.each do |thread|
    dump_backtrace(thread, io)
  end
  nil
end

.dump_backtrace(thread, io) ⇒ Object 



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# File 'lib/sigdump.rb', line 24

def self.dump_backtrace(thread, io)
  status = thread.status
  if status == nil
    status = "finished"
  elsif status == false
    status = "error"
  end

  backtrace = thread.backtrace

  io.write "  Thread #{thread} status=#{status} priority=#{thread.priority}\n"
  backtrace.each {|bt|
    io.write "      #{bt}\n"
  }

  io.flush
  nil
end

.dump_object_count(io) ⇒ Object 



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# File 'lib/sigdump.rb', line 43

def self.dump_object_count(io)
  io.write "  Built-in objects:\n"
  ObjectSpace.count_objects.sort_by {|k,v| -v }.each {|k,v|
    io.write "%10s: %s\n" % [_fn(v), k]
  }

  string_size = 0
  array_size = 0
  hash_size = 0
  cmap = {}
  ObjectSpace.each_object {|o|
    c = o.class
    cmap[c] = (cmap[c] || 0) + 1
    if c == String
      string_size += o.bytesize
    elsif c == Array
      array_size = o.size
    elsif c == Hash
      hash_size = o.size
    end
  }

  io.write "  All objects:\n"
  cmap.sort_by {|k,v| -v }.each {|k,v|
    io.write "%10s: %s\n" % [_fn(v), k]
  }

  io.write "  String #{_fn(string_size)} bytes\n"
  io.write "   Array #{_fn(array_size)} elements\n"
  io.write "    Hash #{_fn(hash_size)} pairs\n"

  io.flush
  nil
end

.install_thread_dump_handler(signal, path = nil) ⇒ Object 



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# File 'lib/sigdump.rb', line 4

def self.install_thread_dump_handler(signal, path=nil)
  Kernel.trap(signal) do
    begin
      _open_dump_path(path) do |io|
        io.write "Sigdump at #{Time.now} process #{Process.pid} (#{$0})\n"
        dump_all_thread_backtrace(io)
        dump_object_count(io)
      end
    rescue
    end
  end
end