Root/scripts/export_report.pl

Source at commit cdde9cf73945d547acd3e96f9508c79e84ad0bf1 created 9 years 4 months ago.
By Maarten ter Huurne, MMC: JZ4740: Added support for CPU frequency changing
1#!/usr/bin/perl -w
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
10use Getopt::Std;
11use strict;
12
13sub numerically {
14    my $no1 = (split /\s+/, $a)[1];
15    my $no2 = (split /\s+/, $b)[1];
16    return $no1 <=> $no2;
17}
18
19sub alphabetically {
20    my ($module1, $value1) = @{$a};
21    my ($module2, $value2) = @{$b};
22    return $value1 <=> $value2 || $module2 cmp $module1;
23}
24
25sub print_depends_on {
26    my ($href) = @_;
27    print "\n";
28    for my $mod (sort keys %$href) {
29        my $list = $href->{$mod};
30        print "\t$mod:\n";
31        foreach my $sym (sort numerically @{$list}) {
32            my ($symbol, $no) = split /\s+/, $sym;
33            printf("\t\t%-25s\n", $symbol);
34        }
35        print "\n";
36    }
37    print "\n";
38    print "~"x80 , "\n";
39}
40
41sub usage {
42        print "Usage: @_ -h -k Module.symvers [ -o outputfile ] \n",
43          "\t-f: treat all the non-option argument as .mod.c files. ",
44          "Recommend using this as the last option\n",
45          "\t-h: print detailed help\n",
46          "\t-k: the path to Module.symvers file. By default uses ",
47          "the file from the current directory\n",
48          "\t-o outputfile: output the report to outputfile\n";
49    exit 0;
50}
51
52sub collectcfiles {
53    my @file;
54    while (<.tmp_versions/*.mod>) {
55    open my $fh, '<', $_ or die "cannot open $_: $!\n";
56    push (@file,
57          grep s/\.ko/.mod.c/, # change the suffix
58          grep m/.+\.ko/, # find the .ko path
59          <$fh>); # lines in opened file
60    }
61    chomp @file;
62    return @file;
63}
64
65my (%SYMBOL, %MODULE, %opt, @allcfiles);
66
67if (not getopts('hk:o:f',\%opt) or defined $opt{'h'}) {
68        usage($0);
69}
70
71if (defined $opt{'f'}) {
72    @allcfiles = @ARGV;
73} else {
74    @allcfiles = collectcfiles();
75}
76
77if (not defined $opt{'k'}) {
78    $opt{'k'} = "Module.symvers";
79}
80
81open (my $module_symvers, '<', $opt{'k'})
82    or die "Sorry, cannot open $opt{'k'}: $!\n";
83
84if (defined $opt{'o'}) {
85    open (my $out, '>', $opt{'o'})
86    or die "Sorry, cannot open $opt{'o'} $!\n";
87
88    select $out;
89}
90
91#
92# collect all the symbols and their attributes from the
93# Module.symvers file
94#
95while ( <$module_symvers> ) {
96    chomp;
97    my (undef, $symbol, $module, $gpl) = split;
98    $SYMBOL { $symbol } = [ $module , "0" , $symbol, $gpl];
99}
100close($module_symvers);
101
102#
103# collect the usage count of each symbol.
104#
105my $modversion_warnings = 0;
106
107foreach my $thismod (@allcfiles) {
108    my $module;
109
110    unless (open ($module, '<', $thismod)) {
111        warn "Sorry, cannot open $thismod: $!\n";
112        next;
113    }
114
115    my $state=0;
116    while ( <$module> ) {
117        chomp;
118        if ($state == 0) {
119            $state = 1 if ($_ =~ /static const struct modversion_info/);
120            next;
121        }
122        if ($state == 1) {
123            $state = 2 if ($_ =~ /__attribute__\(\(section\("__versions"\)\)\)/);
124            next;
125        }
126        if ($state == 2) {
127            if ( $_ !~ /0x[0-9a-f]+,/ ) {
128                next;
129            }
130            my $sym = (split /([,"])/,)[4];
131            my ($module, $value, $symbol, $gpl) = @{$SYMBOL{$sym}};
132            $SYMBOL{ $sym } = [ $module, $value+1, $symbol, $gpl];
133            push(@{$MODULE{$thismod}} , $sym);
134        }
135    }
136    if ($state != 2) {
137        warn "WARNING:$thismod is not built with CONFIG_MODVERSIONS enabled\n";
138        $modversion_warnings++;
139    }
140    close($module);
141}
142
143print "\tThis file reports the exported symbols usage patterns by in-tree\n",
144    "\t\t\t\tmodules\n";
145printf("%s\n\n\n","x"x80);
146printf("\t\t\t\tINDEX\n\n\n");
147printf("SECTION 1: Usage counts of all exported symbols\n");
148printf("SECTION 2: List of modules and the exported symbols they use\n");
149printf("%s\n\n\n","x"x80);
150printf("SECTION 1:\tThe exported symbols and their usage count\n\n");
151printf("%-25s\t%-25s\t%-5s\t%-25s\n", "Symbol", "Module", "Usage count",
152    "export type");
153
154#
155# print the list of unused exported symbols
156#
157foreach my $list (sort alphabetically values(%SYMBOL)) {
158    my ($module, $value, $symbol, $gpl) = @{$list};
159    printf("%-25s\t%-25s\t%-10s\t", $symbol, $module, $value);
160    if (defined $gpl) {
161        printf("%-25s\n",$gpl);
162    } else {
163        printf("\n");
164    }
165}
166printf("%s\n\n\n","x"x80);
167
168printf("SECTION 2:\n\tThis section reports export-symbol-usage of in-kernel
169modules. Each module lists the modules, and the symbols from that module that
170it uses. Each listed symbol reports the number of modules using it\n");
171
172print "\nNOTE: Got $modversion_warnings CONFIG_MODVERSIONS warnings\n\n"
173    if $modversion_warnings;
174
175print "~"x80 , "\n";
176for my $thismod (sort keys %MODULE) {
177    my $list = $MODULE{$thismod};
178    my %depends;
179    $thismod =~ s/\.mod\.c/.ko/;
180    print "\t\t\t$thismod\n";
181    foreach my $symbol (@{$list}) {
182        my ($module, $value, undef, $gpl) = @{$SYMBOL{$symbol}};
183        push (@{$depends{"$module"}}, "$symbol $value");
184    }
185    print_depends_on(\%depends);
186}
187

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