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71 lines
1.5 KiB
Perl
71 lines
1.5 KiB
Perl
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#!/usr/bin/perl -w
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# find a list of fns and variables in the code that could be static
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# usually called with something like this:
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# findstatic.pl `find . -name "*.o"`
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# Andrew Tridgell <tridge@samba.org>
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use strict;
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# use nm to find the symbols
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my($saved_delim) = $/;
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undef $/;
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my($syms) = `nm -o @ARGV`;
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$/ = $saved_delim;
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my(@lines) = split(/\n/s, $syms);
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my(%def);
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my(%undef);
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my(%stype);
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my(%typemap) = (
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"T" => "function",
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"C" => "uninitialised variable",
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"D" => "initialised variable"
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);
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# parse the symbols into defined and undefined
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for (my($i)=0; $i <= $#{@lines}; $i++) {
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my($line) = $lines[$i];
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if ($line =~ /(.*):[a-f0-9]* ([TCD]) (.*)/) {
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my($fname) = $1;
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my($symbol) = $3;
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push(@{$def{$fname}}, $symbol);
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$stype{$symbol} = $2;
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}
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if ($line =~ /(.*):\s* U (.*)/) {
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my($fname) = $1;
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my($symbol) = $2;
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push(@{$undef{$fname}}, $symbol);
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}
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}
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# look for defined symbols that are never referenced outside the place they
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# are defined
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foreach my $f (keys %def) {
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print "Checking $f\n";
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my($found_one) = 0;
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foreach my $s (@{$def{$f}}) {
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my($found) = 0;
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foreach my $f2 (keys %undef) {
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if ($f2 ne $f) {
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foreach my $s2 (@{$undef{$f2}}) {
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if ($s2 eq $s) {
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$found = 1;
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$found_one = 1;
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}
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}
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}
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}
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if ($found == 0) {
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my($t) = $typemap{$stype{$s}};
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print " '$s' is unique to $f ($t)\n";
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}
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}
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if ($found_one == 0) {
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print " all symbols in '$f' are unused (main program?)\n";
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}
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}
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