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Diffstat (limited to 'util/lint/kconfig_lint')
| -rwxr-xr-x | util/lint/kconfig_lint | 1153 |
1 files changed, 1153 insertions, 0 deletions
diff --git a/util/lint/kconfig_lint b/util/lint/kconfig_lint new file mode 100755 index 0000000000..2b871572c1 --- /dev/null +++ b/util/lint/kconfig_lint @@ -0,0 +1,1153 @@ +#!/usr/bin/perl + +# +# This file is part of the coreboot project. +# +# Copyright (C) 2015 Martin L Roth <gaumless@gmail.com> +# Copyright (C) 2015 Google, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. +# + +package kconfig_lint; + +use strict; +use warnings; +use English qw( -no_match_vars ); +use File::Find; +use Getopt::Long; +use Getopt::Std; + +my $suppress_error_output = 0; # flag to prevent warning and error text +my $print_full_output = 0; # flag to print wholeconfig output +my $output_file = "-"; # filename of output - set stdout by default +my $dont_use_git_grep = 0; + +#globals +my $top_dir = "."; # Directory where Kconfig is run +my $root_dir = "src"; # Directory of the top level Kconfig file +my $errors_found = 0; # count of warnings and errors +my $exclude_dirs = '--exclude-dir="build" --exclude-dir="coreboot-builds" --exclude-dir="payloads" --exclude-dir="configs" --exclude-dir="util"'; # directories to exclude when searching for used symbols - NOT USED FOR GIT GREP (TODO) +my @exclude_files = ('\.txt$', '\.tex$', 'config', '\.tags'); #files to exclude when looking for symbols +my $config_file = ""; # name of config file to load symbol values from. +my @wholeconfig; # document the entire kconfig structure +my %loaded_files; # list of each Kconfig file loaded +my %symbols; # main structure of all symbols declared +my %referenced_symbols; # list of symbols referenced by expressions or select statements +my %used_symbols; # structure of symbols used in the tree, and where they're found +my @collected_symbols; # + +Main(); + +#------------------------------------------------------------------------------- +# Main +# +# Start by loading and parsing the top level Kconfig, this pulls in the other +# files. Parsing the tree creates several arrays and hashes that can be used +# to check for errors +#------------------------------------------------------------------------------- +sub Main { + + check_arguments(); + open( STDOUT, "> $output_file" ) or die "Can't open $output_file for output: $!\n"; + + if (defined $top_dir) { + chdir $top_dir or die "Error: can't cd to $top_dir\n"; + } + + die "Error: $top_dir/$root_dir does not exist.\n" unless (-d $root_dir); + + #load the Kconfig tree, checking what we can and building up all the hash tables + build_and_parse_kconfig_tree("$root_dir/Kconfig"); + + #run checks based on the data that was found + find( \&check_if_file_referenced, $root_dir ); + + load_config($config_file) if ($config_file); + + check_defaults(); + check_referenced_symbols(); + + collect_used_symbols(); + check_used_symbols(); + check_for_ifdef(); + check_for_def(); + check_is_enabled(); + + print_wholeconfig(); + + exit($errors_found); +} + +#------------------------------------------------------------------------------- +# check_for_ifdef - Look for instances of #ifdef CONFIG_[symbol_name] and +# #if defined(CONFIG_[symbol_name]). +# +# #ifdef symbol is valid for strings, but bool, hex, and INT are always defined. +# #if defined(symbol) && symbol is also a valid construct. +#------------------------------------------------------------------------------- +sub check_for_ifdef { + my @ifdef_symbols = @collected_symbols; + + #look for #ifdef SYMBOL + while ( my $line = shift @ifdef_symbols ) { + if ( $line =~ /^([^:]+):(\d+):\s*#\s*ifn?def\s+CONFIG_(\w+)/ ) { + my $file = $1; + my $lineno = $2; + my $symbol = $3; + + if ((exists $symbols{$symbol}) && ($symbols{$symbol}{type} ne "string")) { + unless ($suppress_error_output) { + print "#!!!!! Warning: #ifdef 'CONFIG_$symbol' used in $file at line $lineno. Symbols of type '$symbols{$symbol}{type}' are always defined.\n"; + } + $errors_found++; + } + } + } + + # look for (#if) defined SYMBOL + @ifdef_symbols = @collected_symbols; + while ( my $line = shift @ifdef_symbols ) { + if ( $line =~ /^([^:]+):(\d+):.+defined\s*\(\s*CONFIG_(\w+)/ ) { + my $file = $1; + my $lineno = $2; + my $symbol = $3; + + #ignore '#if defined(symbol) && symbol' type statements + next if ( $line =~ /^([^:]+):(\d+):.+defined\s*\(\s*CONFIG_$symbol.*(&&|\|\|)\s*!?\s*\(?\s*CONFIG_$symbol/ ); + + if ((exists $symbols{$symbol}) && ($symbols{$symbol}{type} ne "string")) { + unless ($suppress_error_output) { + print "#!!!!! Warning: defined 'CONFIG_$symbol' used in $file at line $lineno. Symbols of type '$symbols{$symbol}{type}' are always defined.\n"; + } + $errors_found++; + } + } + } +} + +#------------------------------------------------------------------------------- +# check_for_def - Look for instances of #define CONFIG_[symbol_name] +# +# Symbols should not be redefined outside of Kconfig, and #defines should not +# look like symbols +#------------------------------------------------------------------------------- +sub check_for_def { + my @def_symbols = @collected_symbols; + + #look for #ifdef SYMBOL + while ( my $line = shift @def_symbols ) { + if ( $line =~ /^([^:]+):(\d+):\s*#\s*define\s+CONFIG_(\w+)/ ) { + my $file = $1; + my $lineno = $2; + my $symbol = $3; + + if ((exists $symbols{$symbol})) { + unless ($suppress_error_output) { + print "#!!!!! Warning: #define of symbol 'CONFIG_$symbol' used in $file at line $lineno.\n"; + } + $errors_found++; + } else { + unless ($suppress_error_output) { + print "#!!!!! Warning: #define 'CONFIG_$symbol' used in $file at line $lineno. Other #defines should not look like Kconfig symbols.\n"; + } + $errors_found++; + } + } + } +} + +#------------------------------------------------------------------------------- +# check_is_enabled - The IS_ENABLED() macro is only valid for symbols of type +# bool. It would probably work on type hex or int if the value was 0 or 1, but +# this seems like a bad plan. Using it on strings is dead out. +#------------------------------------------------------------------------------- +sub check_is_enabled { + my @is_enabled_symbols = `grep -Grn 'IS_ENABLED\\s*(\\s*CONFIG_' -- "$root_dir"`; + + #sort through symbols found by grep and store them in a hash for easy access + while ( my $line = shift @is_enabled_symbols ) { + if ( $line =~ /^([^:]+):(\d+):.+IS_ENABLED\s*\(\s*CONFIG_(\w+)/ ) { + my $file = $1; + my $lineno = $2; + my $symbol = $3; + + #make sure that + if (exists $symbols{$symbol}) { + if ($symbols{$symbol}{type} ne "bool") { + unless ($suppress_error_output) { + print "#!!!!! Warning: IS_ENABLED(CONFIG_$symbol) used in $file at line $lineno. IS_ENABLED is only valid for type 'bool', not '$symbols{$symbol}{type}'.\n"; + } + $errors_found++; + } + } else { + print "#!!!!! Warning: IS_ENABLED() used on unknown value CONFIG_$symbol in $file at line $lineno.\n"; + } + } else { + print "# uninterpreted IS_ENABLED line: $line\n"; + } + } +} + +#------------------------------------------------------------------------------- +# check_defaults - Look for defaults that come after a default with no +# dependencies. +# +# TODO - check for defaults with the same dependencies +#------------------------------------------------------------------------------- +sub check_defaults { + + # loop through each defined symbol + foreach my $sym ( sort ( keys %symbols ) ) { + my $default_set = 0; + my $default_filename = ""; + my $default_line_no = ""; + + #loop through each instance of that symbol + for ( my $sym_num = 0 ; $sym_num <= $symbols{$sym}{count} ; $sym_num++ ) { + + #loop through any defaults for that instance of that symbol, if there are any + next unless ( exists $symbols{$sym}{$sym_num}{default_max} ); + for ( my $def_num = 0 ; $def_num <= $symbols{$sym}{$sym_num}{default_max} ; $def_num++ ) { + + #if a default is already set, display an error + if ($default_set) { + my $filename = $symbols{$sym}{$sym_num}{file}; + my $line_no = $symbols{$sym}{$sym_num}{default}{$def_num}{default_line_no}; + unless ($suppress_error_output) { + print "#!!!!! Error: Default for '$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"; + } + $errors_found++; + } + else { + #if no default is set, see if this is a default with no dependencies + unless ( ( exists $symbols{$sym}{$sym_num}{default}{$def_num}{default_depends_on} ) + || ( exists $symbols{$sym}{$sym_num}{max_dependency} ) ) + { + $default_set = 1; + $default_filename = $symbols{$sym}{$sym_num}{file}; + $default_line_no = $symbols{$sym}{$sym_num}{default}{$def_num}{default_line_no}; + } + } + } + } + } +} + +#------------------------------------------------------------------------------- +# check_referenced_symbols - Make sure the symbols referenced by expressions and +# select statements are actually valid symbols. +#------------------------------------------------------------------------------- +sub check_referenced_symbols { + + #loop through symbols found in expressions and used by 'select' keywords + foreach my $key ( sort ( keys %referenced_symbols ) ) { + + #make sure the symbol was defined by a 'config' or 'choice' keyword + next if ( exists $symbols{$key} ); + + #loop through each instance of the symbol to print out all of the invalid references + for ( my $i = 0 ; $i <= $referenced_symbols{$key}{count} ; $i++ ) { + my $filename = $referenced_symbols{$key}{$i}{filename}; + my $line_no = $referenced_symbols{$key}{$i}{line_no}; + unless ($suppress_error_output) { + print "#!!!!! Error: Undefined Symbol '$key' used in $filename at line $line_no.\n"; + } + $errors_found++; + } + } +} + +#------------------------------------------------------------------------------- +#------------------------------------------------------------------------------- +sub collect_used_symbols { + # find all references to CONFIG_ statements in the tree + + if ($dont_use_git_grep) { + @collected_symbols = `grep -Irn $exclude_dirs -- "CONFIG_"`; + } else { + @collected_symbols = `git grep -In -- "CONFIG_"`; + } + + my @used_symbols = @collected_symbols; + + #sort through symbols found by grep and store them in a hash for easy access + while ( my $line = shift @used_symbols ) { + while ( $line =~ /[^A-Za-z0-9_]CONFIG_([A-Za-z0-9_]+)/g ) { + my $symbol = $1; + my $filename = ""; + if ($line =~ /^([^:]+):/) { + $filename = $1; + } + + my $skip = 0; + foreach my $exfile ( @exclude_files) { + $skip = ($filename =~ /$exfile/); + last if $skip; + } + last if $skip; + + if (exists $used_symbols{$symbol}{count}) { + $used_symbols{$symbol}{count}++; + } else { + $used_symbols{$symbol}{count} = 0; + } + $used_symbols{$symbol}{"num_$used_symbols{$symbol}{count}"} = $filename; + } + } +} + +#------------------------------------------------------------------------------- +# check_used_symbols - Checks to see whether or not the created symbols are +# actually used. +#------------------------------------------------------------------------------- +sub check_used_symbols { + # loop through all defined symbols and see if they're used anywhere + foreach my $key ( sort ( keys %symbols ) ) { + + #see if they're used internal to Kconfig + next if ( exists $referenced_symbols{$key} ); + + #see if they're used externally + next if exists $used_symbols{$key}; + + #loop through the definitions to print out all the places the symbol is defined. + for ( my $i = 0 ; $i <= $symbols{$key}{count} ; $i++ ) { + my $filename = $symbols{$key}{$i}{file}; + my $line_no = $symbols{$key}{$i}{line_no}; + unless ($suppress_error_output) { + print "#!!!!! Warning: Unused symbol '$key' referenced in $filename at line $line_no.\n"; + } + $errors_found++; + } + } +} + +#------------------------------------------------------------------------------- +# build_and_parse_kconfig_tree +#------------------------------------------------------------------------------- +#load the initial file and start parsing it +sub build_and_parse_kconfig_tree { + my ($top_level_kconfig) = @_; + my @config_to_parse; + my @parseline; + my $inside_help = 0; # set to line number of 'help' keyword if this line is inside a help block + my @inside_if = (); # stack of if dependencies + my $inside_config = ""; # set to symbol name of the config section + my @inside_menu = (); # stack of menu names + my $inside_choice = ""; + my $configs_inside_choice; + + #start the tree off by loading the top level kconfig + @config_to_parse = load_kconfig_file( $top_level_kconfig, "", 0, 0, "", 0 ); + + + while ( ( @parseline = shift(@config_to_parse) ) && ( exists $parseline[0]{text} ) ) { + my $line = $parseline[0]{text}; + my $filename = $parseline[0]{filename}; + my $line_no = $parseline[0]{file_line_no}; + + #handle help - help text: "help" or "---help---" + $inside_help = handle_help( $line, $inside_help, $inside_config, $inside_choice, $filename, $line_no ); + $parseline[0]{inside_help} = $inside_help; + + #look for basic issues in the line, strip crlf + $line = simple_line_checks( $line, $filename, $line_no ); + + #strip comments + $line =~ s/\s*#.*$//; + + #don't parse any more if we're inside a help block + if ($inside_help) { + #do nothing + } + + #handle config + elsif ( $line =~ /^\s*config/ ) { + $line =~ /^\s*config\s+([^"\s]+)\s*(?>#.*)?$/; + my $symbol = $1; + $inside_config = $symbol; + if ($inside_choice) { + $configs_inside_choice++; + } + add_symbol( $symbol, \@inside_menu, $filename, $line_no, \@inside_if ); + } + + #bool|hex|int|string|tristate <expr> [if <expr>] + elsif ( $line =~ /^\s*(bool|string|hex|int|tristate)/ ) { + $line =~ /^\s*(bool|string|hex|int|tristate)\s*(.*)/; + my ( $type, $prompt ) = ( $1, $2 ); + handle_type( $type, $inside_config, $filename, $line_no ); + handle_prompt( $prompt, $type, \@inside_menu, $inside_config, $inside_choice, $filename, $line_no ); + } + + # def_bool|def_tristate <expr> [if <expr>] + elsif ( $line =~ /^\s*(def_bool|def_tristate)/ ) { + $line =~ /^\s*(def_bool|def_tristate)\s+(.*)/; + my ( $orgtype, $default ) = ( $1, $2 ); + ( my $type = $orgtype ) =~ s/def_//; + handle_type( $type, $inside_config, $filename, $line_no ); + handle_default( $default, $orgtype, $inside_config, $inside_choice, $filename, $line_no ); + } + + #prompt <prompt> [if <expr>] + elsif ( $line =~ /^\s*prompt/ ) { + $line =~ /^\s*prompt\s+(.+)/; + handle_prompt( $1, "prompt", \@inside_menu, $inside_config, $inside_choice, $filename, $line_no ); + } + + # default <expr> [if <expr>] + elsif ( $line =~ /^\s*default/ ) { + $line =~ /^\s*default\s+(.*)/; + my $default = $1; + handle_default( $default, "default", $inside_config, $inside_choice, $filename, $line_no ); + } + + # depends on <expr> + elsif ( $line =~ /^\s*depends\s+on/ ) { + $line =~ /^\s*depends\s+on\s+(.*)$/; + my $expr = $1; + handle_depends( $expr, $inside_config, $inside_choice, $filename, $line_no ); + handle_expressions( $expr, $inside_config, $filename, $line_no ); + } + + # comment <prompt> + elsif ( $line =~ /^\s*comment/ ) { + $inside_config = ""; + } + + # choice [symbol] + elsif ( $line =~ /^\s*choice/ ) { + if ( $line =~ /^\s*choice\s*([A-Za-z0-9_]+)$/ ) { + my $symbol = $1; + add_symbol( $symbol, \@inside_menu, $filename, $line_no, \@inside_if ); + handle_type( "bool", $symbol, $filename, $line_no ); + } + $inside_config = ""; + $inside_choice = "$filename $line_no"; + $configs_inside_choice = 0; + } + + # endchoice + elsif ( $line =~ /^\s*endchoice/ ) { + $inside_config = ""; + if ( !$inside_choice ) { + unless ($suppress_error_output) { + print "#!!!!! Warning: 'endchoice' keyword not within a choice block in $filename at line $line_no.\n"; + } + $errors_found++; + } + + $inside_choice = ""; + if ( $configs_inside_choice == 0 ) { + unless ($suppress_error_output) { + print "#!!!!! Warning: choice block has no symbols in $filename at line $line_no.\n"; + } + $errors_found++; + } + $configs_inside_choice = 0; + } + + # [optional] + elsif ( $line =~ /^\s*optional/ ) { + if ($inside_config) { + unless ($suppress_error_output) { + print "#!!!!! Error: Keyword 'optional' appears inside config for '$inside_config' in $filename at line $line_no. This is not valid.\n"; + } + $errors_found++; + } + if ( !$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; |