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