python-lttngust/lttngust/loghandler.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # SPDX-License-Identifier: LGPL-2.1-only
   4 #
   5 # Copyright (C) 2015 Philippe Proulx <pproulx@efficios.com>
   6 # Copyright (C) 2014 David Goulet <dgoulet@efficios.com>
   7
   8 from __future__ import unicode_literals
   9 import logging
  10 import ctypes
  11
  12
  13 class _Handler(logging.Handler):
  14     _LIB_NAME = 'liblttng-ust-python-agent.so.0'
  15
  16     def __init__(self):
  17         super(self.__class__, self).__init__(level=logging.NOTSET)
  18         self.setFormatter(logging.Formatter('%(asctime)s'))
  19
  20         # will raise if library is not found: caller should catch
  21         self.agent_lib = ctypes.cdll.LoadLibrary(_Handler._LIB_NAME)
  22
  23     def emit(self, record):
  24         self.agent_lib.py_tracepoint(self.format(record).encode(),
  25                                      record.getMessage().encode(),
  26                                      record.name.encode(),
  27                                      record.funcName.encode(),
  28                                      record.lineno, record.levelno,
  29                                      record.thread,
  30                                      record.threadName.encode())