#!/usr/bin/env python
# Copyright 2013 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import logging
import os
import sys
import unittest

from six import StringIO

ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.insert(0, ROOT_DIR)

from procfs import ProcMaps


class ProcMapsTest(unittest.TestCase):
  _TEST_PROCMAPS = '\n'.join([
      '00000000-00001000 r--p 00000000 fc:00 0',
      '0080b000-0080c000 r-xp 0020b000 fc:00 2231329'
          '                            /usr/bin/some',
      '0080c000-0080f000 ---p 0020c000 fc:00 2231329'
          '                            /usr/bin/some',
      '0100a000-0100c000 r-xp 0120a000 fc:00 22381'
          '                            /usr/bin/chrome',
      '0100c000-0100f000 ---p 0120c000 fc:00 22381'
          '                            /usr/bin/chrome',
      '0237d000-02a9b000 rw-p 00000000 00:00 0'
          '                                  [heap]',
      '7fb920e6d000-7fb920e85000 r-xp 00000000 fc:00 263482'
          '                     /lib/x86_64-linux-gnu/libpthread-2.15.so',
      '7fb920e85000-7fb921084000 ---p 00018000 fc:00 263482'
          '                     /lib/x86_64-linux-gnu/libpthread-2.15.so',
      '7fb9225f4000-7fb922654000 rw-s 00000000 00:04 19660808'
          '                   /SYSV00000000 (deleted)',
      'ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0'
          '                  [vsyscall]',
      ])

  _EXPECTED = [
      (0x0, 0x1000, 'r', '-', '-', 'p', 0x0, 'fc', '00', 0, ''),
      (0x80b000, 0x80c000, 'r', '-', 'x', 'p', 0x20b000,
       'fc', '00', 2231329, '/usr/bin/some'),
      (0x80c000, 0x80f000, '-', '-', '-', 'p', 0x20c000,
       'fc', '00', 2231329, '/usr/bin/some'),
      (0x100a000, 0x100c000, 'r', '-', 'x', 'p', 0x120a000,
       'fc', '00', 22381, '/usr/bin/chrome'),
      (0x100c000, 0x100f000, '-', '-', '-', 'p', 0x120c000,
       'fc', '00', 22381, '/usr/bin/chrome'),
      (0x237d000, 0x2a9b000, 'r', 'w', '-', 'p', 0x0,
       '00', '00', 0, '[heap]'),
      (0x7fb920e6d000, 0x7fb920e85000, 'r', '-', 'x', 'p', 0x0,
       'fc', '00', 263482, '/lib/x86_64-linux-gnu/libpthread-2.15.so'),
      (0x7fb920e85000, 0x7fb921084000, '-', '-', '-', 'p', 0x18000,
       'fc', '00', 263482, '/lib/x86_64-linux-gnu/libpthread-2.15.so'),
      (0x7fb9225f4000, 0x7fb922654000, 'r', 'w', '-', 's', 0x0,
       '00', '04', 19660808, '/SYSV00000000 (deleted)'),
      (0xffffffffff600000, 0xffffffffff601000, 'r', '-', 'x', 'p', 0x0,
       '00', '00', 0, '[vsyscall]'),
      ]

  @staticmethod
  def _expected_as_dict(index):
    return {
        'begin': ProcMapsTest._EXPECTED[index][0],
        'end': ProcMapsTest._EXPECTED[index][1],
        'readable': ProcMapsTest._EXPECTED[index][2],
        'writable': ProcMapsTest._EXPECTED[index][3],
        'executable': ProcMapsTest._EXPECTED[index][4],
        'private': ProcMapsTest._EXPECTED[index][5],
        'offset': ProcMapsTest._EXPECTED[index][6],
        'major': ProcMapsTest._EXPECTED[index][7],
        'minor': ProcMapsTest._EXPECTED[index][8],
        'inode': ProcMapsTest._EXPECTED[index][9],
        'name': ProcMapsTest._EXPECTED[index][10],
        }

  def test_load(self):
    maps = ProcMaps.load_file(StringIO(self._TEST_PROCMAPS))
    for index, entry in enumerate(maps):
      self.assertEqual(entry.as_dict(), self._expected_as_dict(index))

  def test_constants(self):
    maps = ProcMaps.load_file(StringIO(self._TEST_PROCMAPS))
    selected = [0, 2, 4, 7]
    for index, entry in enumerate(maps.iter(ProcMaps.constants)):
      self.assertEqual(entry.as_dict(),
                       self._expected_as_dict(selected[index]))

  def test_executable(self):
    maps = ProcMaps.load_file(StringIO(self._TEST_PROCMAPS))
    selected = [1, 3, 6, 9]
    for index, entry in enumerate(maps.iter(ProcMaps.executable)):
      self.assertEqual(entry.as_dict(),
                       self._expected_as_dict(selected[index]))

  def test_executable_and_constants(self):
    maps = ProcMaps.load_file(StringIO(self._TEST_PROCMAPS))
    selected = [0, 1, 2, 3, 4, 6, 7, 9]
    for index, entry in enumerate(maps.iter(ProcMaps.executable_and_constants)):
      self.assertEqual(entry.as_dict(),
                       self._expected_as_dict(selected[index]))


if __name__ == '__main__':
  logging.basicConfig(
      level=logging.DEBUG if '-v' in sys.argv else logging.ERROR,
      format='%(levelname)5s %(filename)15s(%(lineno)3d): %(message)s')
  unittest.main()