Tools/Scripts/webkitpy/common/system/profiler_unittest.py

# Copyright (C) 2012 Google Inc. All rights reserved.
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import unittest

from webkitpy.common.system.platforminfo_mock import MockPlatformInfo
from webkitpy.common.system.systemhost_mock import MockSystemHost

from webkitpy.common.system.profiler import ProfilerFactory, GooglePProf


class ProfilerFactoryTest(unittest.TestCase):
    def _assert_default_profiler_name(self, os_name, expected_profiler_name):
        profiler_name = ProfilerFactory.default_profiler_name(MockPlatformInfo(os_name))
        self.assertEqual(profiler_name, expected_profiler_name)

    def test_default_profilers(self):
        self._assert_default_profiler_name('mac', 'iprofiler')
        self._assert_default_profiler_name('linux', 'perf')
        self._assert_default_profiler_name('win32', None)
        self._assert_default_profiler_name('freebsd', None)

    def test_default_profiler_output(self):
        host = MockSystemHost()
        self.assertFalse(host.filesystem.exists("/tmp/output"))

        # Default mocks are Mac, so iprofile should be default.
        profiler = ProfilerFactory.create_profiler(host, '/bin/executable', '/tmp/output')
        self.assertTrue(host.filesystem.exists("/tmp/output"))
        self.assertEqual(profiler._output_path, "/tmp/output/test.dtps")

        # Linux defaults to perf.
        host.platform.os_name = 'linux'
        profiler = ProfilerFactory.create_profiler(host, '/bin/executable', '/tmp/output')
        self.assertEqual(profiler._output_path, "/tmp/output/test.data")


class GooglePProfTest(unittest.TestCase):
    def test_pprof_output_regexp(self):
        pprof_output = """
sometimes
there
is
junk before the total line


Total: 3770 samples
      76   2.0%   2.0%      104   2.8% lookup (inline)
      60   1.6%   3.6%       60   1.6% FL_SetPrevious (inline)
      56   1.5%   5.1%       56   1.5% MaskPtr (inline)
      51   1.4%   6.4%      222   5.9% WebCore::HTMLTokenizer::nextToken
      42   1.1%   7.6%       47   1.2% WTF::Vector::shrinkCapacity
      35   0.9%   8.5%       35   0.9% WTF::RefPtr::get (inline)
      33   0.9%   9.4%       43   1.1% append (inline)
      29   0.8%  10.1%       67   1.8% WTF::StringImpl::deref (inline)
      29   0.8%  10.9%      100   2.7% add (inline)
      28   0.7%  11.6%       28   0.7% WebCore::QualifiedName::localName (inline)
      25   0.7%  12.3%       27   0.7% WebCore::Private::addChildNodesToDeletionQueue
      24   0.6%  12.9%       24   0.6% __memcpy_ssse3_back
      23   0.6%  13.6%       23   0.6% intHash (inline)
      23   0.6%  14.2%       76   2.0% tcmalloc::FL_Next
      23   0.6%  14.8%       95   2.5% tcmalloc::FL_Push
      22   0.6%  15.4%       22   0.6% WebCore::MarkupTokenizerBase::InputStreamPreprocessor::peek (inline)
"""
        expected_first_ten_lines = """      76   2.0%   2.0%      104   2.8% lookup (inline)
      60   1.6%   3.6%       60   1.6% FL_SetPrevious (inline)
      56   1.5%   5.1%       56   1.5% MaskPtr (inline)
      51   1.4%   6.4%      222   5.9% WebCore::HTMLTokenizer::nextToken
      42   1.1%   7.6%       47   1.2% WTF::Vector::shrinkCapacity
      35   0.9%   8.5%       35   0.9% WTF::RefPtr::get (inline)
      33   0.9%   9.4%       43   1.1% append (inline)
      29   0.8%  10.1%       67   1.8% WTF::StringImpl::deref (inline)
      29   0.8%  10.9%      100   2.7% add (inline)
      28   0.7%  11.6%       28   0.7% WebCore::QualifiedName::localName (inline)
"""
        host = MockSystemHost()
        profiler = GooglePProf(host, '/bin/executable', '/tmp/output')
        self.assertEqual(profiler._first_ten_lines_of_profile(pprof_output), expected_first_ten_lines)