scripts/export_report.pl

   1 #!/usr/bin/env perl
   2 #
   3 # (C) Copyright IBM Corporation 2006.
   4 #       Released under GPL v2.
   5 #       Author : Ram Pai (linuxram@us.ibm.com)
   6 #
   7 # Usage: export_report.pl -k Module.symvers [-o report_file ] -f *.mod.c
   8 #
   9
  10 use warnings;
  11 use Getopt::Std;
  12 use strict;
  13
  14 sub numerically {
  15         my $no1 = (split /\s+/, $a)[1];
  16         my $no2 = (split /\s+/, $b)[1];
  17         return $no1 <=> $no2;
  18 }
  19
  20 sub alphabetically {
  21         my ($module1, $value1) = @{$a};
  22         my ($module2, $value2) = @{$b};
  23         return $value1 <=> $value2 || $module2 cmp $module1;
  24 }
  25
  26 sub print_depends_on {
  27         my ($href) = @_;
  28         print "\n";
  29         for my $mod (sort keys %$href) {
  30                 my $list = $href->{$mod};
  31                 print "\t$mod:\n";
  32                 foreach my $sym (sort numerically @{$list}) {
  33                         my ($symbol, $no) = split /\s+/, $sym;
  34                         printf("\t\t%-25s\n", $symbol);
  35                 }
  36                 print "\n";
  37         }
  38         print "\n";
  39         print "~"x80 , "\n";
  40 }
  41
  42 sub usage {
  43         print "Usage: @_ -h -k Module.symvers  [ -o outputfile ] \n",
  44               "\t-f: treat all the non-option argument as .mod.c files. ",
  45               "Recommend using this as the last option\n",
  46               "\t-h: print detailed help\n",
  47               "\t-k: the path to Module.symvers file. By default uses ",
  48               "the file from the current directory\n",
  49               "\t-o outputfile: output the report to outputfile\n";
  50         exit 0;
  51 }
  52
  53 sub collectcfiles {
  54     my @file;
  55     while (<.tmp_versions/*.mod>) {
  56         open my $fh, '<', $_ or die "cannot open $_: $!\n";
  57         push (@file,
  58               grep s/\.ko/.mod.c/,      # change the suffix
  59               grep m/.+\.ko/,           # find the .ko path
  60               <$fh>);                   # lines in opened file
  61     }
  62     chomp @file;
  63     return @file;
  64 }
  65
  66 my (%SYMBOL, %MODULE, %opt, @allcfiles);
  67
  68 if (not getopts('hk:o:f',\%opt) or defined $opt{'h'}) {
  69         usage($0);
  70 }
  71
  72 if (defined $opt{'f'}) {
  73         @allcfiles = @ARGV;
  74 } else {
  75         @allcfiles = collectcfiles();
  76 }
  77
  78 if (not defined $opt{'k'}) {
  79         $opt{'k'} = "Module.symvers";
  80 }
  81
  82 open (my $module_symvers, '<', $opt{'k'})
  83     or die "Sorry, cannot open $opt{'k'}: $!\n";
  84
  85 if (defined $opt{'o'}) {
  86     open (my $out, '>', $opt{'o'})
  87         or die "Sorry, cannot open $opt{'o'} $!\n";
  88
  89     select $out;
  90 }
  91
  92 #
  93 # collect all the symbols and their attributes from the
  94 # Module.symvers file
  95 #
  96 while ( <$module_symvers> ) {
  97         chomp;
  98         my (undef, $symbol, $module, $gpl) = split;
  99         $SYMBOL { $symbol } =  [ $module , "0" , $symbol, $gpl];
 100 }
 101 close($module_symvers);
 102
 103 #
 104 # collect the usage count of each symbol.
 105 #
 106 my $modversion_warnings = 0;
 107
 108 foreach my $thismod (@allcfiles) {
 109         my $module;
 110
 111         unless (open ($module, '<', $thismod)) {
 112                 warn "Sorry, cannot open $thismod: $!\n";
 113                 next;
 114         }
 115
 116         my $state=0;
 117         while ( <$module> ) {
 118                 chomp;
 119                 if ($state == 0) {
 120                         $state = 1 if ($_ =~ /static const struct modversion_info/);
 121                         next;
 122                 }
 123                 if ($state == 1) {
 124                         $state = 2 if ($_ =~ /__attribute__\(\(section\("__versions"\)\)\)/);
 125                         next;
 126                 }
 127                 if ($state == 2) {
 128                         if ( $_ !~ /0x[0-9a-f]+,/ ) {
 129                                 next;
 130                         }
 131                         my $sym = (split /([,"])/,)[4];
 132                         my ($module, $value, $symbol, $gpl) = @{$SYMBOL{$sym}};
 133                         $SYMBOL{ $sym } =  [ $module, $value+1, $symbol, $gpl];
 134                         push(@{$MODULE{$thismod}} , $sym);
 135                 }
 136         }
 137         if ($state != 2) {
 138                 warn "WARNING:$thismod is not built with CONFIG_MODVERSIONS enabled\n";
 139                 $modversion_warnings++;
 140         }
 141         close($module);
 142 }
 143
 144 print "\tThis file reports the exported symbols usage patterns by in-tree\n",
 145         "\t\t\t\tmodules\n";
 146 printf("%s\n\n\n","x"x80);
 147 printf("\t\t\t\tINDEX\n\n\n");
 148 printf("SECTION 1: Usage counts of all exported symbols\n");
 149 printf("SECTION 2: List of modules and the exported symbols they use\n");
 150 printf("%s\n\n\n","x"x80);
 151 printf("SECTION 1:\tThe exported symbols and their usage count\n\n");
 152 printf("%-25s\t%-25s\t%-5s\t%-25s\n", "Symbol", "Module", "Usage count",
 153         "export type");
 154
 155 #
 156 # print the list of unused exported symbols
 157 #
 158 foreach my $list (sort alphabetically values(%SYMBOL)) {
 159         my ($module, $value, $symbol, $gpl) = @{$list};
 160         printf("%-25s\t%-25s\t%-10s\t", $symbol, $module, $value);
 161         if (defined $gpl) {
 162                 printf("%-25s\n",$gpl);
 163         } else {
 164                 printf("\n");
 165         }
 166 }
 167 printf("%s\n\n\n","x"x80);
 168
 169 printf("SECTION 2:\n\tThis section reports export-symbol-usage of in-kernel
 170 modules. Each module lists the modules, and the symbols from that module that
 171 it uses.  Each listed symbol reports the number of modules using it\n");
 172
 173 print "\nNOTE: Got $modversion_warnings CONFIG_MODVERSIONS warnings\n\n"
 174     if $modversion_warnings;
 175
 176 print "~"x80 , "\n";
 177 for my $thismod (sort keys %MODULE) {
 178         my $list = $MODULE{$thismod};
 179         my %depends;
 180         $thismod =~ s/\.mod\.c/.ko/;
 181         print "\t\t\t$thismod\n";
 182         foreach my $symbol (@{$list}) {
 183                 my ($module, $value, undef, $gpl) = @{$SYMBOL{$symbol}};
 184                 push (@{$depends{"$module"}}, "$symbol $value");
 185         }
 186         print_depends_on(\%depends);
 187 }