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#!/usr/bin/perl -w
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# Script loosely based on Chris Waterson's find-leakers.pl and make-tree.pl
use 5.004;
use strict;
use Getopt::Long;
# GetOption will create $opt_object, so ignore the
# warning that gets spit out about those vbls.
GetOptions("object=s", "list", "help");
# use $::opt_help twice to eliminate warning...
($::opt_help) && ($::opt_help) && die qq{
usage: find-comptr-leakers.pl < logfile
--object <obj> Examine only object <obj>
--list Only list leaked objects
--help This message :-)
};
if ($::opt_object) {
warn "Examining only object $::opt_object (THIS IS BROKEN)\n";
} else {
warn "Examining all objects\n";
}
my %allocs = ( );
my %counter;
my $id = 0;
my $accumulating = 0;
my $savedata = 0;
my $class;
my $obj;
my $sno;
my $op;
my $cnt;
my $ptr;
my $strace;
sub save_data {
# save the data
if ($op eq 'nsCOMPtrAddRef') {
push @{ $allocs{$sno}->{$ptr} }, [ +1, $strace ];
}
elsif ($op eq 'nsCOMPtrRelease') {
push @{ $allocs{$sno}->{$ptr} }, [ -1, $strace ];
my $sum = 0;
my @ptrallocs = @{ $allocs{$sno}->{$ptr} };
foreach my $alloc (@ptrallocs) {
$sum += @$alloc[0];
}
if ( $sum == 0 ) {
delete($allocs{$sno}{$ptr});
}
}
}
LINE: while (<>) {
if (/^</) {
chop; # avoid \n in $ptr
my @fields = split(/ /, $_);
($class, $obj, $sno, $op, $cnt, $ptr) = @fields;
$strace = "";
if ($::opt_list) {
save_data();
} elsif (!($::opt_object) || ($::opt_object eq $obj)) {
$accumulating = 1;
}
} elsif ( $accumulating == 1 ) {
if ( /^$/ ) {
# if line is empty
$accumulating = 0;
save_data();
} else {
$strace = $strace . $_;
}
}
}
if ( $accumulating == 1) {
save_data();
}
foreach my $serial (keys(%allocs)) {
foreach my $comptr (keys( %{$allocs{$serial}} )) {
my $sum = 0;
my @ptrallocs = @{ $allocs{$serial}->{$comptr} };
foreach my $alloc (@ptrallocs) {
$sum += @$alloc[0];
}
print "Object ", $serial, " held by ", $comptr, " is ", $sum, " out of balance.\n";
unless ($::opt_list) {
print "\n";
foreach my $alloc (@ptrallocs) {
if (@$alloc[0] == +1) {
print "Put into nsCOMPtr at:\n";
} elsif (@$alloc[0] == -1) {
print "Released from nsCOMPtr at:\n";
}
print @$alloc[1]; # the stack trace
print "\n";
}
print "\n\n";
}
}
}