140 lines
4.6 KiB
Python
140 lines
4.6 KiB
Python
#!/usr/bin/env python
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"""Find Kconfig identifiers that are referenced but not defined."""
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# (c) 2014 Valentin Rothberg <valentinrothberg@gmail.com>
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# (c) 2014 Stefan Hengelein <stefan.hengelein@fau.de>
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#
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# Licensed under the terms of the GNU GPL License version 2
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import os
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import re
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from subprocess import Popen, PIPE, STDOUT
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# regex expressions
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OPERATORS = r"&|\(|\)|\||\!"
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FEATURE = r"(?:\w*[A-Z0-9]\w*){2,}"
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DEF = r"^\s*(?:menu){,1}config\s+(" + FEATURE + r")\s*"
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EXPR = r"(?:" + OPERATORS + r"|\s|" + FEATURE + r")+"
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STMT = r"^\s*(?:if|select|depends\s+on)\s+" + EXPR
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SOURCE_FEATURE = r"(?:\W|\b)+[D]{,1}CONFIG_(" + FEATURE + r")"
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# regex objects
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REGEX_FILE_KCONFIG = re.compile(r".*Kconfig[\.\w+\-]*$")
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REGEX_FEATURE = re.compile(r"(" + FEATURE + r")")
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REGEX_SOURCE_FEATURE = re.compile(SOURCE_FEATURE)
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REGEX_KCONFIG_DEF = re.compile(DEF)
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REGEX_KCONFIG_EXPR = re.compile(EXPR)
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REGEX_KCONFIG_STMT = re.compile(STMT)
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REGEX_KCONFIG_HELP = re.compile(r"^\s+(help|---help---)\s*$")
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REGEX_FILTER_FEATURES = re.compile(r"[A-Za-z0-9]$")
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def main():
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"""Main function of this module."""
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source_files = []
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kconfig_files = []
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defined_features = set()
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referenced_features = dict() # {feature: [files]}
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# use 'git ls-files' to get the worklist
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pop = Popen("git ls-files", stdout=PIPE, stderr=STDOUT, shell=True)
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(stdout, _) = pop.communicate() # wait until finished
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if len(stdout) > 0 and stdout[-1] == "\n":
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stdout = stdout[:-1]
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for gitfile in stdout.rsplit("\n"):
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if ".git" in gitfile or "ChangeLog" in gitfile or \
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".log" in gitfile or os.path.isdir(gitfile):
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continue
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if REGEX_FILE_KCONFIG.match(gitfile):
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kconfig_files.append(gitfile)
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else:
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# all non-Kconfig files are checked for consistency
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source_files.append(gitfile)
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for sfile in source_files:
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parse_source_file(sfile, referenced_features)
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for kfile in kconfig_files:
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parse_kconfig_file(kfile, defined_features, referenced_features)
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print "Undefined symbol used\tFile list"
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for feature in sorted(referenced_features):
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# filter some false positives
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if feature == "FOO" or feature == "BAR" or \
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feature == "FOO_BAR" or feature == "XXX":
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continue
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if feature not in defined_features:
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if feature.endswith("_MODULE"):
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# avoid false positives for kernel modules
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if feature[:-len("_MODULE")] in defined_features:
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continue
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files = referenced_features.get(feature)
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print "%s\t%s" % (feature, ", ".join(files))
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def parse_source_file(sfile, referenced_features):
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"""Parse @sfile for referenced Kconfig features."""
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lines = []
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with open(sfile, "r") as stream:
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lines = stream.readlines()
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for line in lines:
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if not "CONFIG_" in line:
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continue
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features = REGEX_SOURCE_FEATURE.findall(line)
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for feature in features:
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if not REGEX_FILTER_FEATURES.search(feature):
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continue
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sfiles = referenced_features.get(feature, set())
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sfiles.add(sfile)
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referenced_features[feature] = sfiles
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def get_features_in_line(line):
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"""Return mentioned Kconfig features in @line."""
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return REGEX_FEATURE.findall(line)
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def parse_kconfig_file(kfile, defined_features, referenced_features):
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"""Parse @kfile and update feature definitions and references."""
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lines = []
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skip = False
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with open(kfile, "r") as stream:
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lines = stream.readlines()
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for i in range(len(lines)):
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line = lines[i]
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line = line.strip('\n')
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line = line.split("#")[0] # ignore comments
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if REGEX_KCONFIG_DEF.match(line):
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feature_def = REGEX_KCONFIG_DEF.findall(line)
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defined_features.add(feature_def[0])
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skip = False
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elif REGEX_KCONFIG_HELP.match(line):
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skip = True
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elif skip:
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# ignore content of help messages
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pass
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elif REGEX_KCONFIG_STMT.match(line):
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features = get_features_in_line(line)
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# multi-line statements
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while line.endswith("\\"):
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i += 1
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line = lines[i]
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line = line.strip('\n')
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features.extend(get_features_in_line(line))
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for feature in set(features):
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paths = referenced_features.get(feature, set())
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paths.add(kfile)
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referenced_features[feature] = paths
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if __name__ == "__main__":
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main()
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