Module: Sigdump

Defined in:
lib/sigdump.rb

Constant Summary collapse

VERSION = 
"0.2.3"

Class Method Summary collapse

Class Method Details

.dump(path = ENV['SIGDUMP_PATH']) ⇒ Object 



13
14
15
16
17
18
19
20
21
 
# File 'lib/sigdump.rb', line 13

def self.dump(path=ENV['SIGDUMP_PATH'])
  _open_dump_path(path) do |io|
    io.write "Sigdump at #{Time.now} process #{Process.pid} (#{$0})\n"
    dump_all_thread_backtrace(io)
    dump_gc_stat(io)
    dump_object_count(io)
    dump_gc_profiler_result(io)
  end
end

.dump_all_thread_backtrace(io) ⇒ Object 



23
24
25
26
27
28
 
# File 'lib/sigdump.rb', line 23

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

.dump_backtrace(thread, io) ⇒ Object 



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
# File 'lib/sigdump.rb', line 30

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

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

  io.flush
  nil
end

.dump_gc_profiler_result(io) ⇒ Object 



93
94
95
96
97
98
99
100
101
102
103
 
# File 'lib/sigdump.rb', line 93

def self.dump_gc_profiler_result(io)
  return unless defined?(GC::Profiler) && GC::Profiler.enabled?

  io.write "  GC profiling result:\n"
  io.write "  Total garbage collection time: %f\n" % GC::Profiler.total_time
  io.write GC::Profiler.result
  GC::Profiler.clear

  io.flush
  nil
end

.dump_gc_stat(io) ⇒ Object 



82
83
84
85
86
87
88
89
90
91
 
# File 'lib/sigdump.rb', line 82

def self.dump_gc_stat(io)
  io.write "  GC stat:\n"

  GC.stat.each do |key, val|
    io.write "      #{key}: #{val}\n"
  end

  io.flush
  nil
end

.dump_object_count(io) ⇒ Object 



47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
 
# File 'lib/sigdump.rb', line 47

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

.setup(signal = ENV['SIGDUMP_SIGNAL'] || 'SIGCONT', path = ENV['SIGDUMP_PATH']) ⇒ Object 



4
5
6
7
8
9
10
11
 
# File 'lib/sigdump.rb', line 4

def self.setup(signal=ENV['SIGDUMP_SIGNAL'] || 'SIGCONT', path=ENV['SIGDUMP_PATH'])
  Kernel.trap(signal) do
    begin
      dump(path)
    rescue
    end
  end
end