1 files changed, 114 insertions, 0 deletions
diff --git a/tools/rb/find-comptr-leakers.pl b/tools/rb/find-comptr-leakers.pl
new file mode 100755
index 000000000..925119935
--- /dev/null
+++ b/tools/rb/find-comptr-leakers.pl
@@ -0,0 +1,114 @@
+#!/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
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# 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";
+		}
+	}
+}
+