Class: Aeacus::Backtrace

Inherits:
Object
  • Object
show all
Defined in:
lib/aeacus/backtrace.rb

Instance Method Summary collapse

Constructor Details

#initialize(pid) ⇒ Backtrace

Returns a new instance of Backtrace.



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# File 'lib/aeacus/backtrace.rb', line 3

def initialize(pid)
  @pid = pid
  @resource_folder = File.join(File.dirname(File.expand_path(__FILE__)), '../../resources')
end

Instance Method Details

#prepare_commands ⇒ Object 



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# File 'lib/aeacus/backtrace.rb', line 22

def prepare_commands
  commands_file = File.join(@resource_folder, 'gdb_commands')
  commands = File.open(commands_file)
  command_string = commands.read.gsub("PID",@pid.to_s)
  File.open('/tmp/gdb_commands', 'w'){|f| f.write(command_string)}
end

#take_traces ⇒ Object 



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# File 'lib/aeacus/backtrace.rb', line 8

def take_traces
  prepare_commands
  traces = []
  # start gdb with our commands, attached to a given PID
  (1..5).each do |i|
    output = `gdb \`which ruby\` #{@pid} -x /tmp/gdb_commands | grep '^#'`
    traces << `cat /tmp/stdout.#{@pid}`
    puts "--> Took trace #{i}/5"

    sleep 1
  end
  return traces
end