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kunit: kunit_tool: Allow .kunitconfig to disable config items

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Rework kunit_tool in order to allow .kunitconfig files to better enforce
that disabled items in .kunitconfig are disabled in the generated
.config.

Previously, kunit_tool simply enforced that any line present in
.kunitconfig was also present in .config, but this could cause problems
if a config option was disabled in .kunitconfig, but not listed in .config
due to (for example) having disabled dependencies.

To fix this, re-work the parser to track config names and values, and
require values to match unless they are explicitly disabled with the
"CONFIG_x is not set" comment (or by setting its value to 'n'). Those
"disabled" values will pass validation if omitted from the .config, but
not if they have a different value.

Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
David Gow 2020-03-23 19:43:33 -07:00 committed by Shuah Khan
parent 2d68df6cc4
commit 97752c39bd
2 changed files with 43 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
tools/testing/kunit/kunit_config.py
View File

@ -9,16 +9,18 @@
import collections
import re
CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_\w+ is not set$'
CONFIG_PATTERN = r'^CONFIG_\w+=\S+$'
KconfigEntryBase = collections.namedtuple('KconfigEntry', ['raw_entry'])
CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$'
CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+)$'
KconfigEntryBase = collections.namedtuple('KconfigEntry', ['name', 'value'])
class KconfigEntry(KconfigEntryBase):
def __str__(self) -> str:
return self.raw_entry
if self.value == 'n':
return r'# CONFIG_%s is not set' % (self.name)
else:
return r'CONFIG_%s=%s' % (self.name, self.value)
class KconfigParseError(Exception):
@ -38,7 +40,17 @@ class Kconfig(object):
self._entries.append(entry)
def is_subset_of(self, other: 'Kconfig') -> bool:
return self.entries().issubset(other.entries())
for a in self.entries():
found = False
for b in other.entries():
if a.name != b.name:
continue
if a.value != b.value:
return False
found = True
if a.value != 'n' and found == False:
return False
return True
def write_to_file(self, path: str) -> None:
with open(path, 'w') as f:
@ -54,9 +66,20 @@ class Kconfig(object):
line = line.strip()
if not line:
continue
elif config_matcher.match(line) or is_not_set_matcher.match(line):
self._entries.append(KconfigEntry(line))
elif line[0] == '#':
match = config_matcher.match(line)
if match:
entry = KconfigEntry(match.group(1), match.group(2))
self.add_entry(entry)
continue
empty_match = is_not_set_matcher.match(line)
if empty_match:
entry = KconfigEntry(empty_match.group(1), 'n')
self.add_entry(entry)
continue
if line[0] == '#':
continue
else:
raise KconfigParseError('Failed to parse: ' + line)

22
tools/testing/kunit/kunit_tool_test.py
View File

@ -37,7 +37,7 @@ class KconfigTest(unittest.TestCase):
self.assertTrue(kconfig0.is_subset_of(kconfig0))
kconfig1 = kunit_config.Kconfig()
kconfig1.add_entry(kunit_config.KconfigEntry('CONFIG_TEST=y'))
kconfig1.add_entry(kunit_config.KconfigEntry('TEST', 'y'))
self.assertTrue(kconfig1.is_subset_of(kconfig1))
self.assertTrue(kconfig0.is_subset_of(kconfig1))
self.assertFalse(kconfig1.is_subset_of(kconfig0))
@ -51,15 +51,15 @@ class KconfigTest(unittest.TestCase):
expected_kconfig = kunit_config.Kconfig()
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_UML=y'))
kunit_config.KconfigEntry('UML', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_MMU=y'))
kunit_config.KconfigEntry('MMU', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_TEST=y'))
kunit_config.KconfigEntry('TEST', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_EXAMPLE_TEST=y'))
kunit_config.KconfigEntry('EXAMPLE_TEST', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('# CONFIG_MK8 is not set'))
kunit_config.KconfigEntry('MK8', 'n'))
self.assertEqual(kconfig.entries(), expected_kconfig.entries())
@ -68,15 +68,15 @@ class KconfigTest(unittest.TestCase):
expected_kconfig = kunit_config.Kconfig()
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_UML=y'))
kunit_config.KconfigEntry('UML', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_MMU=y'))
kunit_config.KconfigEntry('MMU', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_TEST=y'))
kunit_config.KconfigEntry('TEST', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('CONFIG_EXAMPLE_TEST=y'))
kunit_config.KconfigEntry('EXAMPLE_TEST', 'y'))
expected_kconfig.add_entry(
kunit_config.KconfigEntry('# CONFIG_MK8 is not set'))
kunit_config.KconfigEntry('MK8', 'n'))
expected_kconfig.write_to_file(kconfig_path)