def dump_bpf
      addr = args[2]
      len = Ptrace.peekdata(pid, addr, 0) & 0xffff # len is unsigned short
      filter = Ptrace.peekdata(pid, addr + bits / 8, 0) & ((1 << bits) - 1)
      Array.new(len) { |i| Ptrace.peekdata(pid, filter + i * 8, 0) }.pack('Q*')
    end
def dump_bpf
      addr = args[2]
      len = Ptrace.peekdata(pid, addr, 0) & 0xffff # len is unsigned short
      filter = Ptrace.peekdata(pid, addr + bits / 8, 0) & ((1 << bits) - 1)
      Array.new(len) { |i| Ptrace.peekdata(pid, filter + i * 8, 0) }.pack('Q*')
    end
Dump bpf byte from +args[2]+.
 @return [String]