Mac Easy 2010 May/Mac Life Ubuntu.iso/casper/filesystem.squashfs/usr/src/linux-headers-2.6.28-15/scripts/export_report.pl

Perl Script | 2008-12-24 | 4.2 KB | 170 lines

#!/usr/bin/perl -w
#
# (C) Copyright IBM Corporation 2006.
#    Released under GPL v2.
#    Author : Ram Pai ([e-mail])
#
# Usage: export_report.pl -k Module.symvers [-o report_file ] -f *.mod.c
#

use Getopt::Std;
use strict;

sub numerically {
    my $no1 = (split /\s+/, $a)[1];
    my $no2 = (split /\s+/, $b)[1];
    return $no1 <=> $no2;
}

sub alphabetically {
    my ($module1, $value1) = @{$a};
    my ($module2, $value2) = @{$b};
    return $value1 <=> $value2 || $module2 cmp $module1;
}

sub print_depends_on {
    my ($href) = @_;
    print "\n";
    while (my ($mod, $list) = each %$href) {
        print "\t$mod:\n";
        foreach my $sym (sort numerically @{$list}) {
            my ($symbol, $no) = split /\s+/, $sym;
            printf("\t\t%-25s\t%-25d\n", $symbol, $no);
        }
        print "\n";
    }
    print "\n";
    print "~"x80 , "\n";
}

sub usage {
        print "Usage: @_ -h -k Module.symvers  [ -o outputfile ] \n",
          "\t-f: treat all the non-option argument as .mod.c files. ",
          "Recommend using this as the last option\n",
          "\t-h: print detailed help\n",
          "\t-k: the path to Module.symvers file. By default uses ",
          "the file from the current directory\n",
          "\t-o outputfile: output the report to outputfile\n";
    exit 0;
}

sub collectcfiles {
        my @file = `cat .tmp_versions/*.mod | grep '.*\.ko\$'`;
        @file = grep {s/\.ko/.mod.c/} @file;
    chomp @file;
        return @file;
}

my (%SYMBOL, %MODULE, %opt, @allcfiles);

if (not getopts('hk:o:f',\%opt) or defined $opt{'h'}) {
        usage($0);
}

if (defined $opt{'f'}) {
    @allcfiles = @ARGV;
} else {
    @allcfiles = collectcfiles();
}

if (not defined $opt{'k'}) {
    $opt{'k'} = "Module.symvers";
}

unless (open(MODULE_SYMVERS, $opt{'k'})) {
    die "Sorry, cannot open $opt{'k'}: $!\n";
}

if (defined $opt{'o'}) {
    unless (open(OUTPUT_HANDLE, ">$opt{'o'}")) {
        die "Sorry, cannot open $opt{'o'} $!\n";
    }
    select OUTPUT_HANDLE;
}
#
# collect all the symbols and their attributes from the
# Module.symvers file
#
while ( <MODULE_SYMVERS> ) {
    chomp;
    my (undef, $symbol, $module, $gpl) = split;
    $SYMBOL { $symbol } =  [ $module , "0" , $symbol, $gpl];
}
close(MODULE_SYMVERS);

#
# collect the usage count of each symbol.
#
foreach my $thismod (@allcfiles) {
    unless (open(MODULE_MODULE, $thismod)) {
        print "Sorry, cannot open $thismod: $!\n";
        next;
    }
    my $state=0;
    while ( <MODULE_MODULE> ) {
        chomp;
        if ($state == 0) {
            $state = 1 if ($_ =~ /static const struct modversion_info/);
            next;
        }
        if ($state == 1) {
            $state = 2 if ($_ =~ /__attribute__\(\(section\("__versions"\)\)\)/);
            next;
        }
        if ($state == 2) {
            if ( $_ !~ /0x[0-9a-f]+,/ ) {
                next;
            }
            my $sym = (split /([,"])/,)[4];
            my ($module, $value, $symbol, $gpl) = @{$SYMBOL{$sym}};
            $SYMBOL{ $sym } =  [ $module, $value+1, $symbol, $gpl];
            push(@{$MODULE{$thismod}} , $sym);
        }
    }
    if ($state != 2) {
        print "WARNING:$thismod is not built with CONFIG_MODVERSION enabled\n";
    }
    close(MODULE_MODULE);
}

print "\tThis file reports the exported symbols usage patterns by in-tree\n",
    "\t\t\t\tmodules\n";
printf("%s\n\n\n","x"x80);
printf("\t\t\t\tINDEX\n\n\n");
printf("SECTION 1: Usage counts of all exported symbols\n");
printf("SECTION 2: List of modules and the exported symbols they use\n");
printf("%s\n\n\n","x"x80);
printf("SECTION 1:\tThe exported symbols and their usage count\n\n");
printf("%-25s\t%-25s\t%-5s\t%-25s\n", "Symbol", "Module", "Usage count",
    "export type");

#
# print the list of unused exported symbols
#
foreach my $list (sort alphabetically values(%SYMBOL)) {
    my ($module, $value, $symbol, $gpl) = @{$list};
    printf("%-25s\t%-25s\t%-10s\t", $symbol, $module, $value);
    if (defined $gpl) {
        printf("%-25s\n",$gpl);
    } else {
        printf("\n");
    }
}
printf("%s\n\n\n","x"x80);

printf("SECTION 2:\n\tThis section reports export-symbol-usage of in-kernel
modules. Each module lists the modules, and the symbols from that module that
it uses.  Each listed symbol reports the number of modules using it\n");

print "~"x80 , "\n";
while (my ($thismod, $list) = each %MODULE) {
    my %depends;
    $thismod =~ s/\.mod\.c/.ko/;
    print "\t\t\t$thismod\n";
    foreach my $symbol (@{$list}) {
        my ($module, $value, undef, $gpl) = @{$SYMBOL{$symbol}};
        push (@{$depends{"$module"}}, "$symbol $value");
    }
    print_depends_on(\%depends);
}