1151 lines
44 KiB
Perl
Executable File
1151 lines
44 KiB
Perl
Executable File
#!/usr/bin/perl
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#
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# This file is part of the coreboot project.
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#
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# Copyright (C) 2015 Martin L Roth <gaumless@gmail.com>
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# Copyright (C) 2015 Google, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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package kconfig_lint;
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use strict;
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use warnings;
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use English qw( -no_match_vars );
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use File::Find;
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use Getopt::Long;
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use Getopt::Std;
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my $suppress_error_output = 0; # flag to prevent warning and error text
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my $print_full_output = 0; # flag to print wholeconfig output
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my $output_file = "-"; # filename of output - set stdout by default
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my $dont_use_git_grep = 0;
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#globals
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my $top_dir = "."; # Directory where Kconfig is run
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my $root_dir = "src"; # Directory of the top level Kconfig file
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my $errors_found = 0; # count of warnings and errors
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my $exclude_dirs = '--exclude-dir="build" --exclude-dir="coreboot-builds" --exclude-dir="payloads" --exclude-dir="configs" --exclude-dir="util"'; # directories to exclude when searching for used symbols - NOT USED FOR GIT GREP (TODO)
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my @exclude_files = ('\.txt$', '\.tex$', 'config', '\.tags'); #files to exclude when looking for symbols
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my $config_file = ""; # name of config file to load symbol values from.
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my @wholeconfig; # document the entire kconfig structure
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my %loaded_files; # list of each Kconfig file loaded
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my %symbols; # main structure of all symbols declared
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my %referenced_symbols; # list of symbols referenced by expressions or select statements
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my %used_symbols; # structure of symbols used in the tree, and where they're found
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my @collected_symbols; #
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Main();
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#-------------------------------------------------------------------------------
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# Main
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#
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# Start by loading and parsing the top level Kconfig, this pulls in the other
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# files. Parsing the tree creates several arrays and hashes that can be used
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# to check for errors
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#-------------------------------------------------------------------------------
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sub Main {
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check_arguments();
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open( STDOUT, "> $output_file" ) or die "Can't open $output_file for output: $!\n";
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if (defined $top_dir) {
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chdir $top_dir or die "Error: can't cd to $top_dir\n";
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}
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die "Error: $top_dir/$root_dir does not exist.\n" unless (-d $root_dir);
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#load the Kconfig tree, checking what we can and building up all the hash tables
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build_and_parse_kconfig_tree("$root_dir/Kconfig");
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#run checks based on the data that was found
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find( \&check_if_file_referenced, $root_dir );
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load_config($config_file) if ($config_file);
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check_defaults();
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check_referenced_symbols();
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collect_used_symbols();
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check_used_symbols();
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check_for_ifdef();
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check_for_def();
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check_is_enabled();
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print_wholeconfig();
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exit($errors_found);
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}
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#-------------------------------------------------------------------------------
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# check_for_ifdef - Look for instances of #ifdef CONFIG_[symbol_name] and
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# #if defined(CONFIG_[symbol_name]).
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#
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# #ifdef symbol is valid for strings, but bool, hex, and INT are always defined.
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# #if defined(symbol) && symbol is also a valid construct.
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#-------------------------------------------------------------------------------
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sub check_for_ifdef {
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my @ifdef_symbols = @collected_symbols;
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#look for #ifdef SYMBOL
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while ( my $line = shift @ifdef_symbols ) {
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if ( $line =~ /^([^:]+):(\d+):\s*#\s*ifn?def\s+CONFIG_(\w+)/ ) {
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my $file = $1;
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my $lineno = $2;
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my $symbol = $3;
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if ((exists $symbols{$symbol}) && ($symbols{$symbol}{type} ne "string")) {
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unless ($suppress_error_output) {
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print "#!!!!! Warning: #ifdef 'CONFIG_$symbol' used in $file at line $lineno. Symbols of type '$symbols{$symbol}{type}' are always defined.\n";
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}
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$errors_found++;
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}
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}
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}
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# look for (#if) defined SYMBOL
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@ifdef_symbols = @collected_symbols;
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while ( my $line = shift @ifdef_symbols ) {
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if ( $line =~ /^([^:]+):(\d+):.+defined\s*\(\s*CONFIG_(\w+)/ ) {
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my $file = $1;
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my $lineno = $2;
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my $symbol = $3;
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#ignore '#if defined(symbol) && symbol' type statements
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next if ( $line =~ /^([^:]+):(\d+):.+defined\s*\(\s*CONFIG_$symbol.*(&&|\|\|)\s*!?\s*\(?\s*CONFIG_$symbol/ );
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if ((exists $symbols{$symbol}) && ($symbols{$symbol}{type} ne "string")) {
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unless ($suppress_error_output) {
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print "#!!!!! Warning: defined 'CONFIG_$symbol' used in $file at line $lineno. Symbols of type '$symbols{$symbol}{type}' are always defined.\n";
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}
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$errors_found++;
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}
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}
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}
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}
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#-------------------------------------------------------------------------------
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# check_for_def - Look for instances of #define CONFIG_[symbol_name]
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#
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# Symbols should not be redefined outside of Kconfig, and #defines should not
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# look like symbols
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#-------------------------------------------------------------------------------
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sub check_for_def {
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my @def_symbols = @collected_symbols;
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#look for #ifdef SYMBOL
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while ( my $line = shift @def_symbols ) {
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if ( $line =~ /^([^:]+):(\d+):\s*#\s*define\s+CONFIG_(\w+)/ ) {
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my $file = $1;
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my $lineno = $2;
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my $symbol = $3;
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if ((exists $symbols{$symbol})) {
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unless ($suppress_error_output) {
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print "#!!!!! Warning: #define of symbol 'CONFIG_$symbol' used in $file at line $lineno.\n";
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}
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$errors_found++;
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} else {
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unless ($suppress_error_output) {
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print "#!!!!! Warning: #define 'CONFIG_$symbol' used in $file at line $lineno. Other #defines should not look like Kconfig symbols.\n";
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}
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$errors_found++;
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}
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}
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}
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}
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#-------------------------------------------------------------------------------
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# check_is_enabled - The IS_ENABLED() macro is only valid for symbols of type
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# bool. It would probably work on type hex or int if the value was 0 or 1, but
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# this seems like a bad plan. Using it on strings is dead out.
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#-------------------------------------------------------------------------------
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sub check_is_enabled {
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my @is_enabled_symbols = `grep -Grn 'IS_ENABLED\\s*(\\s*CONFIG_' -- "$root_dir"`;
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#sort through symbols found by grep and store them in a hash for easy access
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while ( my $line = shift @is_enabled_symbols ) {
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if ( $line =~ /^([^:]+):(\d+):.+IS_ENABLED\s*\(\s*CONFIG_(\w+)/ ) {
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my $file = $1;
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my $lineno = $2;
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my $symbol = $3;
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#make sure that
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if (exists $symbols{$symbol}) {
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if ($symbols{$symbol}{type} ne "bool") {
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unless ($suppress_error_output) {
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print "#!!!!! Warning: IS_ENABLED(CONFIG_$symbol) used in $file at line $lineno. IS_ENABLED is only valid for type 'bool', not '$symbols{$symbol}{type}'.\n";
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}
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$errors_found++;
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}
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} else {
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print "#!!!!! Warning: IS_ENABLED() used on unknown value CONFIG_$symbol in $file at line $lineno.\n";
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}
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} else {
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print "# uninterpreted IS_ENABLED line: $line\n";
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}
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}
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}
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#-------------------------------------------------------------------------------
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# check_defaults - Look for defaults that come after a default with no
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# dependencies.
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#
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# TODO - check for defaults with the same dependencies
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#-------------------------------------------------------------------------------
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sub check_defaults {
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# loop through each defined symbol
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foreach my $sym ( sort ( keys %symbols ) ) {
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my $default_set = 0;
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my $default_filename = "";
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my $default_line_no = "";
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#loop through each instance of that symbol
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for ( my $sym_num = 0 ; $sym_num <= $symbols{$sym}{count} ; $sym_num++ ) {
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#loop through any defaults for that instance of that symbol, if there are any
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next unless ( exists $symbols{$sym}{$sym_num}{default_max} );
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for ( my $def_num = 0 ; $def_num <= $symbols{$sym}{$sym_num}{default_max} ; $def_num++ ) {
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#if a default is already set, display an error
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if ($default_set) {
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my $filename = $symbols{$sym}{$sym_num}{file};
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my $line_no = $symbols{$sym}{$sym_num}{default}{$def_num}{default_line_no};
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unless ($suppress_error_output) {
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print "#!!!!! Error: Default for '$sym' referenced in $filename at line $line_no will never be set - overridden by default set in $default_filename at line $default_line_no \n";
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}
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$errors_found++;
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}
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else {
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#if no default is set, see if this is a default with no dependencies
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unless ( ( exists $symbols{$sym}{$sym_num}{default}{$def_num}{default_depends_on} )
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|| ( exists $symbols{$sym}{$sym_num}{max_dependency} ) )
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{
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$default_set = 1;
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$default_filename = $symbols{$sym}{$sym_num}{file};
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$default_line_no = $symbols{$sym}{$sym_num}{default}{$def_num}{default_line_no};
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}
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}
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}
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}
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}
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}
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#-------------------------------------------------------------------------------
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# check_referenced_symbols - Make sure the symbols referenced by expressions and
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# select statements are actually valid symbols.
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#-------------------------------------------------------------------------------
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sub check_referenced_symbols {
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#loop through symbols found in expressions and used by 'select' keywords
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foreach my $key ( sort ( keys %referenced_symbols ) ) {
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#make sure the symbol was defined by a 'config' or 'choice' keyword
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next if ( exists $symbols{$key} );
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#loop through each instance of the symbol to print out all of the invalid references
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for ( my $i = 0 ; $i <= $referenced_symbols{$key}{count} ; $i++ ) {
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my $filename = $referenced_symbols{$key}{$i}{filename};
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my $line_no = $referenced_symbols{$key}{$i}{line_no};
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unless ($suppress_error_output) {
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print "#!!!!! Error: Undefined Symbol '$key' used in $filename at line $line_no.\n";
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}
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$errors_found++;
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}
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}
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}
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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sub collect_used_symbols {
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# find all references to CONFIG_ statements in the tree
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if ($dont_use_git_grep) {
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@collected_symbols = `grep -Irn $exclude_dirs -- "CONFIG_"`;
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} else {
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@collected_symbols = `git grep -In -- "CONFIG_"`;
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}
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my @used_symbols = @collected_symbols;
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#sort through symbols found by grep and store them in a hash for easy access
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while ( my $line = shift @used_symbols ) {
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while ( $line =~ /[^A-Za-z0-9_]CONFIG_([A-Za-z0-9_]+)/g ) {
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my $symbol = $1;
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my $filename = "";
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if ($line =~ /^([^:]+):/) {
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$filename = $1;
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}
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my $skip = 0;
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foreach my $exfile ( @exclude_files) {
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$skip = ($filename =~ /$exfile/);
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last if $skip;
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}
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last if $skip;
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if (exists $used_symbols{$symbol}{count}) {
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$used_symbols{$symbol}{count}++;
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} else {
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$used_symbols{$symbol}{count} = 0;
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}
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$used_symbols{$symbol}{"num_$used_symbols{$symbol}{count}"} = $filename;
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}
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}
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}
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#-------------------------------------------------------------------------------
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# check_used_symbols - Checks to see whether or not the created symbols are
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# actually used.
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#-------------------------------------------------------------------------------
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sub check_used_symbols {
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# loop through all defined symbols and see if they're used anywhere
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foreach my $key ( sort ( keys %symbols ) ) {
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#see if they're used internal to Kconfig
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next if ( exists $referenced_symbols{$key} );
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#see if they're used externally
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next if exists $used_symbols{$key};
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#loop through the definitions to print out all the places the symbol is defined.
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for ( my $i = 0 ; $i <= $symbols{$key}{count} ; $i++ ) {
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my $filename = $symbols{$key}{$i}{file};
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my $line_no = $symbols{$key}{$i}{line_no};
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unless ($suppress_error_output) {
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print "#!!!!! Warning: Unused symbol '$key' referenced in $filename at line $line_no.\n";
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}
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$errors_found++;
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}
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}
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}
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#-------------------------------------------------------------------------------
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# build_and_parse_kconfig_tree
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#-------------------------------------------------------------------------------
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#load the initial file and start parsing it
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sub build_and_parse_kconfig_tree {
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my ($top_level_kconfig) = @_;
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my @config_to_parse;
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my @parseline;
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my $inside_help = 0; # set to line number of 'help' keyword if this line is inside a help block
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my @inside_if = (); # stack of if dependencies
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my $inside_config = ""; # set to symbol name of the config section
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my @inside_menu = (); # stack of menu names
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my $inside_choice = "";
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my $configs_inside_choice;
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#start the tree off by loading the top level kconfig
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@config_to_parse = load_kconfig_file( $top_level_kconfig, "", 0, 0, "", 0 );
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while ( ( @parseline = shift(@config_to_parse) ) && ( exists $parseline[0]{text} ) ) {
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my $line = $parseline[0]{text};
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my $filename = $parseline[0]{filename};
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my $line_no = $parseline[0]{file_line_no};
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#handle help - help text: "help" or "---help---"
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$inside_help = handle_help( $line, $inside_help, $inside_config, $inside_choice, $filename, $line_no );
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$parseline[0]{inside_help} = $inside_help;
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#look for basic issues in the line, strip crlf
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$line = simple_line_checks( $line, $filename, $line_no );
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#strip comments
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$line =~ s/\s*#.*$//;
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#don't parse any more if we're inside a help block
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if ($inside_help) {
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#do nothing
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}
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#handle config
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elsif ( $line =~ /^\s*config/ ) {
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$line =~ /^\s*config\s+([^"\s]+)\s*(?>#.*)?$/;
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my $symbol = $1;
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$inside_config = $symbol;
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if ($inside_choice) {
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$configs_inside_choice++;
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}
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add_symbol( $symbol, \@inside_menu, $filename, $line_no, \@inside_if );
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}
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#bool|hex|int|string|tristate <expr> [if <expr>]
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elsif ( $line =~ /^\s*(bool|string|hex|int|tristate)/ ) {
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$line =~ /^\s*(bool|string|hex|int|tristate)\s*(.*)/;
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my ( $type, $prompt ) = ( $1, $2 );
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handle_type( $type, $inside_config, $filename, $line_no );
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handle_prompt( $prompt, $type, \@inside_menu, $inside_config, $inside_choice, $filename, $line_no );
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}
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# def_bool|def_tristate <expr> [if <expr>]
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elsif ( $line =~ /^\s*(def_bool|def_tristate)/ ) {
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$line =~ /^\s*(def_bool|def_tristate)\s+(.*)/;
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my ( $orgtype, $default ) = ( $1, $2 );
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( my $type = $orgtype ) =~ s/def_//;
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handle_type( $type, $inside_config, $filename, $line_no );
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handle_default( $default, $orgtype, $inside_config, $inside_choice, $filename, $line_no );
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}
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#prompt <prompt> [if <expr>]
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elsif ( $line =~ /^\s*prompt/ ) {
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$line =~ /^\s*prompt\s+(.+)/;
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handle_prompt( $1, "prompt", \@inside_menu, $inside_config, $inside_choice, $filename, $line_no );
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}
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# default <expr> [if <expr>]
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elsif ( $line =~ /^\s*default/ ) {
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$line =~ /^\s*default\s+(.*)/;
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my $default = $1;
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handle_default( $default, "default", $inside_config, $inside_choice, $filename, $line_no );
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}
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# depends on <expr>
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elsif ( $line =~ /^\s*depends\s+on/ ) {
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$line =~ /^\s*depends\s+on\s+(.*)$/;
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my $expr = $1;
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handle_depends( $expr, $inside_config, $inside_choice, $filename, $line_no );
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handle_expressions( $expr, $inside_config, $filename, $line_no );
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}
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# comment <prompt>
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elsif ( $line =~ /^\s*comment/ ) {
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$inside_config = "";
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}
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# choice [symbol]
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elsif ( $line =~ /^\s*choice/ ) {
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if ( $line =~ /^\s*choice\s*([A-Za-z0-9_]+)$/ ) {
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my $symbol = $1;
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add_symbol( $symbol, \@inside_menu, $filename, $line_no, \@inside_if );
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handle_type( "bool", $symbol, $filename, $line_no );
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}
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$inside_config = "";
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$inside_choice = "$filename $line_no";
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$configs_inside_choice = 0;
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}
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# endchoice
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elsif ( $line =~ /^\s*endchoice/ ) {
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$inside_config = "";
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if ( !$inside_choice ) {
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unless ($suppress_error_output) {
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print "#!!!!! Warning: 'endchoice' keyword not within a choice block in $filename at line $line_no.\n";
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}
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$errors_found++;
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}
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$inside_choice = "";
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if ( $configs_inside_choice == 0 ) {
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unless ($suppress_error_output) {
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print "#!!!!! Warning: choice block has no symbols in $filename at line $line_no.\n";
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}
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$errors_found++;
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}
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$configs_inside_choice = 0;
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}
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# [optional]
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elsif ( $line =~ /^\s*optional/ ) {
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if ($inside_config) {
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unless ($suppress_error_output) {
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print "#!!!!! Error: Keyword 'optional' appears inside config for '$inside_config' in $filename at line $line_no. This is not valid.\n";
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}
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$errors_found++;
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}
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if ( !$inside_choice ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Error: Keyword 'optional' appears outside of a choice block in $filename at line $line_no. This is not valid.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
# mainmenu <prompt>
|
|
elsif ( $line =~ /^\s*mainmenu/ ) {
|
|
$inside_config = "";
|
|
}
|
|
|
|
# menu <prompt>
|
|
elsif ( $line =~ /^\s*menu/ ) {
|
|
$line =~ /^\s*menu\s+(.*)/;
|
|
my $menu = $1;
|
|
if ( $menu =~ /^\s*"([^"]*)"\s*$/ ) {
|
|
$menu = $1;
|
|
}
|
|
|
|
$inside_config = "";
|
|
$inside_choice = "";
|
|
push( @inside_menu, $menu );
|
|
}
|
|
|
|
# endmenu
|
|
elsif ( $line =~ /^\s*endmenu/ ) {
|
|
$inside_config = "";
|
|
$inside_choice = "";
|
|
pop @inside_menu;
|
|
}
|
|
|
|
# "if" <expr>
|
|
elsif ( $line =~ /^\s*if/ ) {
|
|
$inside_config = "";
|
|
$line =~ /^\s*if\s+(.*)$/;
|
|
my $expr = $1;
|
|
push( @inside_if, $expr );
|
|
handle_expressions( $expr, $inside_config, $filename, $line_no );
|
|
|
|
}
|
|
|
|
# endif
|
|
elsif ( $line =~ /^\s*endif/ ) {
|
|
$inside_config = "";
|
|
pop(@inside_if);
|
|
}
|
|
|
|
#range <symbol> <symbol> [if <expr>]
|
|
elsif ( $line =~ /^\s*range/ ) {
|
|
$line =~ /^\s*range\s+(\S+)\s+(.*)$/;
|
|
handle_range( $1, $2, $inside_config, $filename, $line_no );
|
|
}
|
|
|
|
# select <symbol> [if <expr>]
|
|
elsif ( $line =~ /^\s*select/ ) {
|
|
unless ($inside_config) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Error: Keyword 'select' appears outside of config in $filename at line $line_no. This is not valid.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
|
|
if ( $line =~ /^\s*select\s+(.*)$/ ) {
|
|
$line = $1;
|
|
my $expression;
|
|
( $line, $expression ) = handle_if_line( $line, $inside_config, $filename, $line_no );
|
|
if ($line) {
|
|
add_referenced_symbol( $line, $filename, $line_no );
|
|
}
|
|
}
|
|
}
|
|
|
|
# source <prompt>
|
|
elsif ( $line =~ /^\s*source\s+"?([^"\s]+)"?\s*(?>#.*)?$/ ) {
|
|
my @newfile = load_kconfig_file( $1, $filename, $line_no, 0, $filename, $line_no );
|
|
unshift( @config_to_parse, @newfile );
|
|
$parseline[0]{text} = "# '$line'\n";
|
|
}
|
|
elsif (
|
|
( $line =~ /^\s*#/ ) || #comments
|
|
( $line =~ /^\s*$/ ) #blank lines
|
|
)
|
|
{
|
|
# do nothing
|
|
}
|
|
else {
|
|
unless ($suppress_error_output) {
|
|
print "### $line ($filename line $line_no unrecognized)\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
|
|
push @wholeconfig, @parseline;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
#-------------------------------------------------------------------------------
|
|
sub handle_depends {
|
|
my ( $expr, $inside_config, $inside_choice, $filename, $line_no ) = @_;
|
|
|
|
if ($inside_config) {
|
|
my $sym_num = $symbols{$inside_config}{count};
|
|
if ( exists $symbols{$inside_config}{$sym_num}{max_dependency} ) {
|
|
$symbols{$inside_config}{$sym_num}{max_dependency}++;
|
|
}
|
|
else {
|
|
$symbols{$inside_config}{$sym_num}{max_dependency} = 0;
|
|
}
|
|
|
|
my $dep_num = $symbols{$inside_config}{$sym_num}{max_dependency};
|
|
$symbols{$inside_config}{$sym_num}{dependency}{$dep_num} = $expr;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
#-------------------------------------------------------------------------------
|
|
sub add_symbol {
|
|
my ( $symbol, $menu_array_ref, $filename, $line_no, $ifref ) = @_;
|
|
my @inside_if = @{$ifref};
|
|
|
|
#initialize the symbol or increment the use count.
|
|
if (( !exists $symbols{$symbol}) || ( !exists $symbols{$symbol}{count} )) {
|
|
$symbols{$symbol}{count} = 0;
|
|
}
|
|
else {
|
|
$symbols{$symbol}{count}++;
|
|
}
|
|
|
|
# add the location of this instance
|
|
my $symcount = $symbols{$symbol}{count};
|
|
$symbols{$symbol}{$symcount}{file} = $filename;
|
|
$symbols{$symbol}{$symcount}{line_no} = $line_no;
|
|
|
|
#Add the menu structure
|
|
if ( defined @$menu_array_ref[0] ) {
|
|
$symbols{$symbol}{$symcount}{menu} = $menu_array_ref;
|
|
}
|
|
|
|
#Add any 'if' statements that the symbol is inside as dependencies
|
|
if (@inside_if) {
|
|
my $dep_num = 0;
|
|
for my $dependency (@inside_if) {
|
|
$symbols{$symbol}{$symcount}{dependency}{$dep_num} = $dependency;
|
|
$symbols{$symbol}{$symcount}{max_dependency} = $dep_num;
|
|
$dep_num++;
|
|
}
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# handle range
|
|
#-------------------------------------------------------------------------------
|
|
sub handle_range {
|
|
my ( $range1, $range2, $inside_config, $filename, $line_no ) = @_;
|
|
|
|
my $expression;
|
|
( $range2, $expression ) = handle_if_line( $range2, $inside_config, $filename, $line_no );
|
|
|
|
$range1 =~ /^\s*(?:0x)?([A-Fa-f0-9]+)\s*$/;
|
|
my $checkrange1 = $1;
|
|
$range2 =~ /^\s*(?:0x)?([A-Fa-f0-9]+)\s*$/;
|
|
my $checkrange2 = $1;
|
|
|
|
if ( $checkrange1 && $checkrange2 && ( hex($checkrange1) > hex($checkrange2) ) ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Error: Range entry in $filename line $line_no value 1 ($range1) is greater than value 2 ($range2).\n";
|
|
}
|
|
$errors_found++;
|
|
|
|
}
|
|
|
|
if ($inside_config) {
|
|
if ( exists( $symbols{$inside_config}{range1} ) ) {
|
|
if ( ( $symbols{$inside_config}{range1} != $range1 ) || ( $symbols{$inside_config}{range2} != $range2 ) ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Note: Config '$inside_config' range entry $range1 $range2 at $filename line $line_no does";
|
|
print " not match the previously defined range $symbols{$inside_config}{range1} $symbols{$inside_config}{range2}";
|
|
print " defined in $symbols{$inside_config}{range_file} on line";
|
|
print " $symbols{$inside_config}{range_line_no}.\n";
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
$symbols{$inside_config}{range1} = $range1;
|
|
$symbols{$inside_config}{range2} = $range2;
|
|
$symbols{$inside_config}{range_file} = $filename;
|
|
$symbols{$inside_config}{range_line_no} = $line_no;
|
|
}
|
|
}
|
|
else {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Error: Range entry in $filename line $line_no is not inside a config block.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# handle_default
|
|
#-------------------------------------------------------------------------------
|
|
sub handle_default {
|
|
my ( $default, $name, $inside_config, $inside_choice, $filename, $line_no ) = @_;
|
|
my $expression;
|
|
( $default, $expression ) = handle_if_line( $default, $inside_config, $filename, $line_no );
|
|
|
|
if ($inside_config) {
|
|
handle_expressions( $default, $inside_config, $filename, $line_no );
|
|
my $sym_num = $symbols{$inside_config}{count};
|
|
|
|
unless ( exists $symbols{$inside_config}{$sym_num}{default_max} ) {
|
|
$symbols{$inside_config}{$sym_num}{default_max} = 0;
|
|
}
|
|
my $default_max = $symbols{$inside_config}{$sym_num}{default_max};
|
|
$symbols{$inside_config}{$sym_num}{default}{$default_max}{default} = $default;
|
|
$symbols{$inside_config}{$sym_num}{default}{$default_max}{default_line_no} = $line_no;
|
|
if ($expression) {
|
|
$symbols{$inside_config}{$sym_num}{default}{$default_max}{default_depends_on} = $expression;
|
|
}
|
|
}
|
|
elsif ($inside_choice) {
|
|
handle_expressions( $default, $inside_config, $filename, $line_no );
|
|
}
|
|
else {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Error: $name entry in $filename line $line_no is not inside a config or choice block.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# handle_if_line
|
|
#-------------------------------------------------------------------------------
|
|
sub handle_if_line {
|
|
my ( $exprline, $inside_config, $filename, $line_no ) = @_;
|
|
|
|
if ( $exprline !~ /if/ ) {
|
|
return ( $exprline, "" );
|
|
}
|
|
|
|
#remove any quotes that might have an 'if' in them
|
|
my $savequote;
|
|
if ( $exprline =~ /^\s*("[^"]+")/ ) {
|
|
$savequote = $1;
|
|
$exprline =~ s/^\s*("[^"]+")//;
|
|
}
|
|
|
|
my $expr = "";
|
|
if ( $exprline =~ /\s*if\s+(.*)$/ ) {
|
|
$expr = $1;
|
|
$exprline =~ s/\s*if\s+.*$//;
|
|
|
|
if ($expr) {
|
|
handle_expressions( $expr, $inside_config, $filename, $line_no );
|
|
}
|
|
}
|
|
|
|
if ($savequote) {
|
|
$exprline = $savequote;
|
|
}
|
|
|
|
return ( $exprline, $expr );
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# handle_expressions - log which symbols are being used
|
|
#-------------------------------------------------------------------------------
|
|
sub handle_expressions {
|
|
my ( $exprline, $inside_config, $filename, $line_no ) = @_;
|
|
|
|
return unless ($exprline);
|
|
|
|
#filter constant symbols first
|
|
if ( $exprline =~ /^\s*"?([yn])"?\s*$/ ) { # constant y/n
|
|
return;
|
|
}
|
|
elsif ( $exprline =~ /^\s*"?((?:-)\d+)"?\s*$/ ) { # int values
|
|
return;
|
|
}
|
|
elsif ( $exprline =~ /^\s*"?((?:-)?(?:0x)?\p{XDigit})+"?\s*$/ ) { # hex values
|
|
return;
|
|
}
|
|
elsif ( $exprline =~ /^\s*("[^"]*")\s*$/ ) { # String values
|
|
return;
|
|
}
|
|
elsif ( $exprline =~ /^\s*([A-Za-z0-9_]+)\s*$/ ) { # <symbol> (1)
|
|
add_referenced_symbol( $1, $filename, $line_no );
|
|
}
|
|
elsif ( $exprline =~ /^\s*!(.+)$/ ) { # '!' <expr> (5)
|
|
|
|
handle_expressions( $1, $inside_config, $filename, $line_no );
|
|
}
|
|
elsif ( $exprline =~ /^\s*\(([^)]+)\)\s*$/ ) { # '(' <expr> ')' (4)
|
|
handle_expressions( $1, $inside_config, $filename, $line_no );
|
|
}
|
|
elsif ( $exprline =~ /^\s*(.+)\s*!=\s*(.+)\s*$/ ) { # <symbol> '!=' <symbol> (3)
|
|
handle_expressions( $1, $inside_config, $filename, $line_no );
|
|
handle_expressions( $2, $inside_config, $filename, $line_no );
|
|
}
|
|
elsif ( $exprline =~ /^\s*(.+)\s*=\s*(.+)\s*$/ ) { # <symbol> '=' <symbol> (2)
|
|
handle_expressions( $1, $inside_config, $filename, $line_no );
|
|
handle_expressions( $2, $inside_config, $filename, $line_no );
|
|
}
|
|
elsif ( $exprline =~ /^\s*([^(]+|\(.+\))\s*&&\s*(.+)\s*$/ ) { # <expr> '&&' <expr> (6)
|
|
handle_expressions( $1, $inside_config, $filename, $line_no );
|
|
handle_expressions( $2, $inside_config, $filename, $line_no );
|
|
}
|
|
elsif ( $exprline =~ /^\s*([^(]+|\(.+\))\s*\|\|\s*(.+)\s*$/ ) { # <expr> '||' <expr> (7)
|
|
handle_expressions( $1, $inside_config, $filename, $line_no );
|
|
handle_expressions( $2, $inside_config, $filename, $line_no );
|
|
}
|
|
|
|
# work around kconfig spec violation for now - paths not in quotes
|
|
elsif ( $exprline =~ /^\s*([A-Za-z0-9_\-\/]+)\s*$/ ) { # <symbol> (1)
|
|
return;
|
|
}
|
|
else {
|
|
unless ($suppress_error_output) {
|
|
print "#### Unrecognized expression '$exprline' in $filename line $line_no.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# add_referenced_symbol
|
|
#-------------------------------------------------------------------------------
|
|
sub add_referenced_symbol {
|
|
my ( $symbol, $filename, $line_no ) = @_;
|
|
if ( exists $referenced_symbols{$symbol} ) {
|
|
$referenced_symbols{$symbol}{count}++;
|
|
$referenced_symbols{$symbol}{ $referenced_symbols{$symbol}{count} }{filename} = $filename;
|
|
$referenced_symbols{$symbol}{ $referenced_symbols{$symbol}{count} }{line_no} = $line_no;
|
|
}
|
|
else {
|
|
$referenced_symbols{$symbol}{count} = 0;
|
|
$referenced_symbols{$symbol}{0}{filename} = $filename;
|
|
$referenced_symbols{$symbol}{0}{line_no} = $line_no;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# handle_help
|
|
#-------------------------------------------------------------------------------
|
|
{
|
|
#create a non-global static variable by enclosing it and the subroutine
|
|
my $help_whitespace = ""; #string to show length of the help whitespace
|
|
|
|
sub handle_help {
|
|
my ( $line, $inside_help, $inside_config, $inside_choice, $filename, $line_no ) = @_;
|
|
|
|
if ($inside_help) {
|
|
|
|
#get the indentation level if it's not already set.
|
|
if ( ( !$help_whitespace ) && ( $line !~ /^[\r\n]+/ ) ) {
|
|
$line =~ /^(\s+)/; #find the indentation level.
|
|
$help_whitespace = $1;
|
|
if ( !$help_whitespace ) {
|
|
unless ($suppress_error_output) {
|
|
print "# Warning: $filename line $line_no help text starts with no whitespace.\n";
|
|
}
|
|
return $inside_help;
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
#help ends at the first line which has a smaller indentation than the first line of the help text.
|
|
if ( ( $line !~ /$help_whitespace/ ) && ( $line !~ /^[\r\n]+/ ) ) {
|
|
$inside_help = 0;
|
|
$help_whitespace = "";
|
|
}
|
|
else { #if it's not ended, add the line to the helptext array for the symbol's instance
|
|
if ($inside_config) {
|
|
my $sym_num = $symbols{$inside_config}{count};
|
|
if ($help_whitespace) { $line =~ s/^$help_whitespace//; }
|
|
push( @{ $symbols{$inside_config}{$sym_num}{helptext} }, $line );
|
|
}
|
|
}
|
|
}
|
|
elsif ( ( $line =~ /^(\s*)help/ ) || ( $line =~ /^(\s*)---help---/ ) ) {
|
|
$inside_help = $line_no;
|
|
if ( ( !$inside_config ) && ( !$inside_choice ) ) {
|
|
unless ($suppress_error_output) {
|
|
print "# Note: $filename line $line_no help is not inside a config or choice block.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
elsif ($inside_config) {
|
|
$help_whitespace = "";
|
|
my $sym_num = $symbols{$inside_config}{count};
|
|
$symbols{$inside_config}{$sym_num}{help_line_no} = $line_no;
|
|
$symbols{$inside_config}{$sym_num}{helptext} = ();
|
|
}
|
|
}
|
|
return $inside_help;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# handle_type
|
|
#-------------------------------------------------------------------------------
|
|
sub handle_type {
|
|
my ( $type, $inside_config, $filename, $line_no ) = @_;
|
|
|
|
my $expression;
|
|
( $type, $expression ) = handle_if_line( $type, $inside_config, $filename, $line_no );
|
|
|
|
if ($inside_config) {
|
|
if ( exists( $symbols{$inside_config}{type} ) ) {
|
|
if ( $symbols{$inside_config}{type} !~ /$type/ ) {
|
|
print "#!!!!! Error: Config '$inside_config' type entry $type at $filename line $line_no does not match";
|
|
print " the previously defined type $symbols{$inside_config}{type}";
|
|
print " defined in $symbols{$inside_config}{type_file} on line";
|
|
print " $symbols{$inside_config}{type_line_no}.\n";
|
|
$errors_found++;
|
|
}
|
|
}
|
|
else {
|
|
$symbols{$inside_config}{type} = $type;
|
|
$symbols{$inside_config}{type_file} = $filename;
|
|
$symbols{$inside_config}{type_line_no} = $line_no;
|
|
}
|
|
}
|
|
else {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Error: Type entry in $filename line $line_no is not inside a config block.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# handle_prompt
|
|
#-------------------------------------------------------------------------------
|
|
sub handle_prompt {
|
|
my ( $prompt, $name, $menu_array_ref, $inside_config, $inside_choice, $filename, $line_no ) = @_;
|
|
|
|
my $expression;
|
|
( $prompt, $expression ) = handle_if_line( $prompt, $inside_config, $filename, $line_no );
|
|
|
|
if ($inside_config) {
|
|
if ( $prompt !~ /^\s*$/ ) {
|
|
if ( $prompt =~ /^\s*"([^"]*)"\s*$/ ) {
|
|
$prompt = $1;
|
|
}
|
|
|
|
if ( !defined @$menu_array_ref[0] ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Warning: Symbol '$inside_config' with prompt '$prompt' appears outside of a menu in $filename at line $line_no. This is discouraged.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
|
|
my $sym_num = $symbols{$inside_config}{count};
|
|
unless ( exists $symbols{$inside_config}{$sym_num}{prompt_max} ) {
|
|
$symbols{$inside_config}{$sym_num}{prompt_max} = 0;
|
|
}
|
|
my $prompt_max = $symbols{$inside_config}{$sym_num}{prompt_max};
|
|
$symbols{$inside_config}{$sym_num}{prompt}{$prompt_max}{prompt} = $prompt;
|
|
$symbols{$inside_config}{$sym_num}{prompt}{$prompt_max}{prompt_line_no} = $line_no;
|
|
if ($expression) {
|
|
$symbols{$inside_config}{$sym_num}{prompt}{$prompt_max}{prompt_depends_on} = $expression;
|
|
}
|
|
}
|
|
}
|
|
elsif ($inside_choice) {
|
|
|
|
#do nothing
|
|
}
|
|
else {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Error: $name entry in $filename line $line_no is not inside a config or choice block.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# simple_line_checks - Does some basic checks on the current line, then cleans the line
|
|
# up for further processing.
|
|
#-------------------------------------------------------------------------------
|
|
sub simple_line_checks {
|
|
my ( $line, $filename, $line_no ) = @_;
|
|
|
|
#check for spaces instead of tabs
|
|
if ( $line =~ /^ +/ ) {
|
|
unless ($suppress_error_output) {
|
|
print "# Note: $filename line $line_no starts with a space.\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
|
|
#verify a linefeed at the end of the line
|
|
if ( $line !~ /.*\n/ ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Warning: $filename line $line_no does not end with linefeed. This can cause the line to not be recognized by the Kconfig parser.\n";
|
|
print "#($line)\n";
|
|
}
|
|
$errors_found++;
|
|
$line =~ s/\s*$//;
|
|
}
|
|
else {
|
|
chop($line);
|
|
}
|
|
|
|
return $line;
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# load_kconfig_file - Loads a single Kconfig file or expands * wildcard
|
|
#-------------------------------------------------------------------------------
|
|
sub load_kconfig_file {
|
|
my ( $input_file, $loadfile, $loadline, $expanded, $topfile, $topline ) = @_;
|
|
my @file_data;
|
|
my @dir_file_data;
|
|
|
|
#recursively handle coreboot's new source glob operator
|
|
if ( $input_file =~ /^(.*?)\/\*\/(.*)$/ ) {
|
|
my $dir_prefix = $1;
|
|
my $dir_suffix = $2;
|
|
if ( -d "$dir_prefix" ) {
|
|
|
|
opendir( D, "$dir_prefix" ) || die "Can't open directory '$dir_prefix'\n";
|
|
my @dirlist = sort { $a cmp $b } readdir(D);
|
|
closedir(D);
|
|
|
|
while ( my $directory = shift @dirlist ) {
|
|
|
|
#ignore non-directory files
|
|
if ( ( -d "$dir_prefix/$directory" ) && !( $directory =~ /^\..*/ ) ) {
|
|
push @dir_file_data, load_kconfig_file( "$dir_prefix/$directory/$dir_suffix", $input_file, $loadline, 1, $loadfile, $loadline );
|
|
}
|
|
}
|
|
}
|
|
|
|
#the directory should exist when using a glob
|
|
else {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Warning: Could not find dir '$dir_prefix'\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
#if the file exists, try to load it.
|
|
elsif ( -e "$input_file" ) {
|
|
|
|
#throw a warning if the file has already been loaded.
|
|
if ( exists $loaded_files{$input_file} ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Warning: '$input_file' sourced in '$loadfile' at line $loadline was already loaded by $loaded_files{$input_file}\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
|
|
#load the file's contents and mark the file as loaded for checking later
|
|
open( my $HANDLE, "<", "$input_file" ) or die "Error: could not open file '$input_file'\n";
|
|
@file_data = <$HANDLE>;
|
|
close $HANDLE;
|
|
$loaded_files{$input_file} = "'$loadfile' line $loadline";
|
|
}
|
|
|
|
# if the file isn't being loaded from a glob, it should exist.
|
|
elsif ( $expanded == 0 ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Warning: Could not find file '$input_file' sourced in $loadfile at line $loadline\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
|
|
my $line_in_file = 0;
|
|
while ( my $line = shift @file_data ) {
|
|
|
|
#handle line continuation.
|
|
my $continue_line = 0;
|
|
while ($line =~ /(.*)\s+\\$/) {
|
|
my $text = $1;
|
|
|
|
# get rid of leading whitespace on all but the first and last lines
|
|
$text =~ s/^\s*/ / if ($continue_line);
|
|
|
|
$dir_file_data[$line_in_file]{text} .= $text;
|
|
$line = shift @file_data;
|
|
$continue_line++;
|
|
|
|
#put the data into the continued lines (other than the first)
|
|
$line =~ /^\s*(.*)\s*$/;
|
|
|
|
$dir_file_data[$line_in_file + $continue_line]{text} = "\t# continued line ( " . $1 . " )\n";
|
|
$dir_file_data[$line_in_file + $continue_line]{filename} = $input_file;
|
|
$dir_file_data[$line_in_file + $continue_line]{file_line_no} = $line_in_file + $continue_line + 1;
|
|
|
|
#get rid of multiple leading spaces for last line
|
|
$line = " $1\n";
|
|
}
|
|
|
|
$dir_file_data[$line_in_file]{text} .= $line;
|
|
$dir_file_data[$line_in_file]{filename} = $input_file;
|
|
$dir_file_data[$line_in_file]{file_line_no} = $line_in_file + 1;
|
|
|
|
$line_in_file++;
|
|
if ($continue_line) {
|
|
$line_in_file += $continue_line;
|
|
}
|
|
}
|
|
|
|
if ($topfile) {
|
|
my %file_data;
|
|
$file_data{text} = "\t### File '$input_file' loaded from '$topfile' line $topline\n" ;
|
|
$file_data{filename} = $topfile;
|
|
$file_data{file_line_no} = "($topline)";
|
|
unshift (@dir_file_data, \%file_data);
|
|
}
|
|
|
|
return @dir_file_data;
|
|
}
|
|
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# print_wholeconfig - prints out the parsed Kconfig file
|
|
#-------------------------------------------------------------------------------
|
|
sub print_wholeconfig {
|
|
|
|
return unless $print_full_output;
|
|
|
|
for ( my $i = 0 ; $i < $#wholeconfig ; $i++ ) {
|
|
my $line = $wholeconfig[$i];
|
|
chop( $line->{text} );
|
|
|
|
#replace tabs with spaces for consistency
|
|
$line->{text} =~ s/\t/ /g;
|
|
printf "%-120s # $line->{filename} line $line->{file_line_no}\n", $line->{text};
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# check_if_file_referenced - checks for kconfig files that are not being parsed
|
|
#-------------------------------------------------------------------------------
|
|
sub check_if_file_referenced {
|
|
my $filename = $File::Find::name;
|
|
if ( ( $filename =~ /Kconfig/ ) && ( !exists $loaded_files{$filename} ) ) {
|
|
unless ($suppress_error_output) {
|
|
print "#!!!!! Warning: '$filename' is never referenced\n";
|
|
}
|
|
$errors_found++;
|
|
}
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# check_arguments parse the command line arguments
|
|
#-------------------------------------------------------------------------------
|
|
sub check_arguments {
|
|
my $show_usage = 0;
|
|
GetOptions(
|
|
'help|?' => sub { usage() },
|
|
'o|output=s' => \$output_file,
|
|
'p|print' => \$print_full_output,
|
|
'w|warnings_off' => \$suppress_error_output,
|
|
'path=s' => \$top_dir,
|
|
'c|config=s' => \$config_file,
|
|
'G|no_git_grep' => \$dont_use_git_grep,
|
|
);
|
|
}
|
|
|
|
#-------------------------------------------------------------------------------
|
|
# usage - Print the arguments for the user
|
|
#-------------------------------------------------------------------------------
|
|
sub usage {
|
|
print "kconfig_lint <options>\n";
|
|
print " -o|--output=file Set output filename\n";
|
|
print " -p|--print Print full output\n";
|
|
print " -w|--warnings_off Don't print warnings\n";
|
|
print " --path=dir Path to top level kconfig\n";
|
|
print " -c|--config=file Filename of config file to load\n";
|
|
print " -G|--no_git_grep Use standard grep tools instead of git grep\n";
|
|
|
|
exit(0);
|
|
}
|
|
|
|
1;
|