Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: 705b5ba7c1526c65bbcf2d0868f2a2f007a158e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
#!/usr/bin/perl -w
#
# (C) Copyright IBM Corporation 2006.
#	Released under GPL v2.
#	Author : Ram Pai (linuxram@us.ibm.com)
#
# 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);
}