summaryrefslogtreecommitdiff
path: root/source4/script/findstatic.pl
diff options
context:
space:
mode:
Diffstat (limited to 'source4/script/findstatic.pl')
-rwxr-xr-xsource4/script/findstatic.pl70
1 files changed, 70 insertions, 0 deletions
diff --git a/source4/script/findstatic.pl b/source4/script/findstatic.pl
new file mode 100755
index 0000000000..43a4916435
--- /dev/null
+++ b/source4/script/findstatic.pl
@@ -0,0 +1,70 @@
+#!/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";
+ }
+}
+