1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/tools/rb/find-comptr-leakers.pl Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,114 @@
1.4 +#!/usr/bin/perl -w
1.5 +#
1.6 +# This Source Code Form is subject to the terms of the Mozilla Public
1.7 +# License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 +# file, You can obtain one at http://mozilla.org/MPL/2.0/.
1.9 +
1.10 +# Script loosely based on Chris Waterson's find-leakers.pl and make-tree.pl
1.11 +
1.12 +use 5.004;
1.13 +use strict;
1.14 +use Getopt::Long;
1.15 +
1.16 +# GetOption will create $opt_object, so ignore the
1.17 +# warning that gets spit out about those vbls.
1.18 +GetOptions("object=s", "list", "help");
1.19 +
1.20 +# use $::opt_help twice to eliminate warning...
1.21 +($::opt_help) && ($::opt_help) && die qq{
1.22 +usage: find-comptr-leakers.pl < logfile
1.23 + --object <obj> Examine only object <obj>
1.24 + --list Only list leaked objects
1.25 + --help This message :-)
1.26 +};
1.27 +
1.28 +if ($::opt_object) {
1.29 + warn "Examining only object $::opt_object (THIS IS BROKEN)\n";
1.30 +} else {
1.31 + warn "Examining all objects\n";
1.32 +}
1.33 +
1.34 +my %allocs = ( );
1.35 +my %counter;
1.36 +my $id = 0;
1.37 +
1.38 +my $accumulating = 0;
1.39 +my $savedata = 0;
1.40 +my $class;
1.41 +my $obj;
1.42 +my $sno;
1.43 +my $op;
1.44 +my $cnt;
1.45 +my $ptr;
1.46 +my $strace;
1.47 +
1.48 +sub save_data {
1.49 + # save the data
1.50 + if ($op eq 'nsCOMPtrAddRef') {
1.51 + push @{ $allocs{$sno}->{$ptr} }, [ +1, $strace ];
1.52 + }
1.53 + elsif ($op eq 'nsCOMPtrRelease') {
1.54 + push @{ $allocs{$sno}->{$ptr} }, [ -1, $strace ];
1.55 + my $sum = 0;
1.56 + my @ptrallocs = @{ $allocs{$sno}->{$ptr} };
1.57 + foreach my $alloc (@ptrallocs) {
1.58 + $sum += @$alloc[0];
1.59 + }
1.60 + if ( $sum == 0 ) {
1.61 + delete($allocs{$sno}{$ptr});
1.62 + }
1.63 + }
1.64 +}
1.65 +
1.66 +LINE: while (<>) {
1.67 + if (/^</) {
1.68 + chop; # avoid \n in $ptr
1.69 + my @fields = split(/ /, $_);
1.70 +
1.71 + ($class, $obj, $sno, $op, $cnt, $ptr) = @fields;
1.72 +
1.73 + $strace = "";
1.74 +
1.75 + if ($::opt_list) {
1.76 + save_data();
1.77 + } elsif (!($::opt_object) || ($::opt_object eq $obj)) {
1.78 + $accumulating = 1;
1.79 + }
1.80 + } elsif ( $accumulating == 1 ) {
1.81 + if ( /^$/ ) {
1.82 + # if line is empty
1.83 + $accumulating = 0;
1.84 + save_data();
1.85 + } else {
1.86 + $strace = $strace . $_;
1.87 + }
1.88 + }
1.89 +}
1.90 +if ( $accumulating == 1) {
1.91 + save_data();
1.92 +}
1.93 +
1.94 +foreach my $serial (keys(%allocs)) {
1.95 + foreach my $comptr (keys( %{$allocs{$serial}} )) {
1.96 + my $sum = 0;
1.97 + my @ptrallocs = @{ $allocs{$serial}->{$comptr} };
1.98 + foreach my $alloc (@ptrallocs) {
1.99 + $sum += @$alloc[0];
1.100 + }
1.101 + print "Object ", $serial, " held by ", $comptr, " is ", $sum, " out of balance.\n";
1.102 + unless ($::opt_list) {
1.103 + print "\n";
1.104 + foreach my $alloc (@ptrallocs) {
1.105 + if (@$alloc[0] == +1) {
1.106 + print "Put into nsCOMPtr at:\n";
1.107 + } elsif (@$alloc[0] == -1) {
1.108 + print "Released from nsCOMPtr at:\n";
1.109 + }
1.110 + print @$alloc[1]; # the stack trace
1.111 + print "\n";
1.112 + }
1.113 + print "\n\n";
1.114 + }
1.115 + }
1.116 +}
1.117 +
