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186 lines
4.5 KiB
186 lines
4.5 KiB
#!/usr/bin/env perl |
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# SPDX-License-Identifier: GPL-2.0-only |
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# |
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# (C) Copyright IBM Corporation 2006. |
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# Author : Ram Pai ([email protected]) |
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# |
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# Usage: export_report.pl -k Module.symvers [-o report_file ] -f *.mod.c |
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# |
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use warnings; |
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use Getopt::Std; |
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use strict; |
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sub numerically { |
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my $no1 = (split /\s+/, $a)[1]; |
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my $no2 = (split /\s+/, $b)[1]; |
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return $no1 <=> $no2; |
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} |
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sub alphabetically { |
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my ($module1, $value1) = @{$a}; |
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my ($module2, $value2) = @{$b}; |
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return $value1 <=> $value2 || $module2 cmp $module1; |
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} |
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sub print_depends_on { |
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my ($href) = @_; |
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print "\n"; |
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for my $mod (sort keys %$href) { |
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my $list = $href->{$mod}; |
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print "\t$mod:\n"; |
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foreach my $sym (sort numerically @{$list}) { |
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my ($symbol, $no) = split /\s+/, $sym; |
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printf("\t\t%-25s\n", $symbol); |
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} |
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print "\n"; |
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} |
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print "\n"; |
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print "~"x80 , "\n"; |
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} |
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sub usage { |
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print "Usage: @_ -h -k Module.symvers [ -o outputfile ] \n", |
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"\t-f: treat all the non-option argument as .mod.c files. ", |
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"Recommend using this as the last option\n", |
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"\t-h: print detailed help\n", |
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"\t-k: the path to Module.symvers file. By default uses ", |
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"the file from the current directory\n", |
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"\t-o outputfile: output the report to outputfile\n"; |
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exit 0; |
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} |
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sub collectcfiles { |
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my @file; |
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open my $fh, '< modules.order' or die "cannot open modules.order: $!\n"; |
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while (<$fh>) { |
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s/\.ko$/.mod.c/; |
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push (@file, $_) |
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} |
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close($fh); |
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chomp @file; |
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return @file; |
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} |
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my (%SYMBOL, %MODULE, %opt, @allcfiles); |
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if (not getopts('hk:o:f',\%opt) or defined $opt{'h'}) { |
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usage($0); |
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} |
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if (defined $opt{'f'}) { |
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@allcfiles = @ARGV; |
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} else { |
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@allcfiles = collectcfiles(); |
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} |
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if (not defined $opt{'k'}) { |
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$opt{'k'} = "Module.symvers"; |
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} |
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open (my $module_symvers, '<', $opt{'k'}) |
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or die "Sorry, cannot open $opt{'k'}: $!\n"; |
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if (defined $opt{'o'}) { |
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open (my $out, '>', $opt{'o'}) |
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or die "Sorry, cannot open $opt{'o'} $!\n"; |
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select $out; |
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} |
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# |
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# collect all the symbols and their attributes from the |
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# Module.symvers file |
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# |
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while ( <$module_symvers> ) { |
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chomp; |
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my (undef, $symbol, $module, $gpl, $namespace) = split('\t'); |
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$SYMBOL { $symbol } = [ $module , "0" , $symbol, $gpl]; |
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} |
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close($module_symvers); |
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# |
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# collect the usage count of each symbol. |
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# |
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my $modversion_warnings = 0; |
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foreach my $thismod (@allcfiles) { |
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my $module; |
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unless (open ($module, '<', $thismod)) { |
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warn "Sorry, cannot open $thismod: $!\n"; |
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next; |
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} |
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my $state=0; |
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while ( <$module> ) { |
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chomp; |
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if ($state == 0) { |
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$state = 1 if ($_ =~ /static const struct modversion_info/); |
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next; |
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} |
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if ($state == 1) { |
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$state = 2 if ($_ =~ /__attribute__\(\(section\("__versions"\)\)\)/); |
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next; |
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} |
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if ($state == 2) { |
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if ( $_ !~ /0x[0-9a-f]+,/ ) { |
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next; |
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} |
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my $sym = (split /([,"])/,)[4]; |
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my ($module, $value, $symbol, $gpl) = @{$SYMBOL{$sym}}; |
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$SYMBOL{ $sym } = [ $module, $value+1, $symbol, $gpl]; |
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push(@{$MODULE{$thismod}} , $sym); |
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} |
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} |
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if ($state != 2) { |
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warn "WARNING:$thismod is not built with CONFIG_MODVERSIONS enabled\n"; |
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$modversion_warnings++; |
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} |
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close($module); |
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} |
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print "\tThis file reports the exported symbols usage patterns by in-tree\n", |
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"\t\t\t\tmodules\n"; |
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printf("%s\n\n\n","x"x80); |
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printf("\t\t\t\tINDEX\n\n\n"); |
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printf("SECTION 1: Usage counts of all exported symbols\n"); |
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printf("SECTION 2: List of modules and the exported symbols they use\n"); |
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printf("%s\n\n\n","x"x80); |
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printf("SECTION 1:\tThe exported symbols and their usage count\n\n"); |
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printf("%-25s\t%-25s\t%-5s\t%-25s\n", "Symbol", "Module", "Usage count", |
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"export type"); |
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# |
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# print the list of unused exported symbols |
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# |
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foreach my $list (sort alphabetically values(%SYMBOL)) { |
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my ($module, $value, $symbol, $gpl) = @{$list}; |
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printf("%-25s\t%-25s\t%-10s\t", $symbol, $module, $value); |
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if (defined $gpl) { |
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printf("%-25s\n",$gpl); |
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} else { |
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printf("\n"); |
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} |
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} |
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printf("%s\n\n\n","x"x80); |
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printf("SECTION 2:\n\tThis section reports export-symbol-usage of in-kernel |
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modules. Each module lists the modules, and the symbols from that module that |
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it uses. Each listed symbol reports the number of modules using it\n"); |
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print "\nNOTE: Got $modversion_warnings CONFIG_MODVERSIONS warnings\n\n" |
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if $modversion_warnings; |
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print "~"x80 , "\n"; |
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for my $thismod (sort keys %MODULE) { |
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my $list = $MODULE{$thismod}; |
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my %depends; |
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$thismod =~ s/\.mod\.c/.ko/; |
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print "\t\t\t$thismod\n"; |
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foreach my $symbol (@{$list}) { |
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my ($module, $value, undef, $gpl) = @{$SYMBOL{$symbol}}; |
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push (@{$depends{"$module"}}, "$symbol $value"); |
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} |
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print_depends_on(\%depends); |
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}
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