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#!/usr/bin/perl
# 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/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.
use strict;
use warnings;
use lib qw(. lib local/lib/perl5);
$| = 1;
use constant BATCH_SIZE => 100;
use Bugzilla;
use Bugzilla::Bug;
use Bugzilla::Constants;
use Bugzilla::Util qw( trim );
use List::MoreUtils qw( any );
use Text::Balanced qw( extract_bracketed extract_multiple );
Bugzilla->usage_mode(USAGE_MODE_CMDLINE);
my $user = Bugzilla::User->check({name => 'automation@bmo.tld'});
$user->{groups} = [Bugzilla::Group->get_all];
$user->{bless_groups} = [Bugzilla::Group->get_all];
Bugzilla->set_user($user);
my $dbh = Bugzilla->dbh;
# find the bugs
my $bugs = $dbh->selectall_arrayref(
"SELECT bug_id,cf_crash_signature FROM bugs WHERE resolution = '' AND cf_crash_signature != ''",
{Slice => {}}
);
my $count = scalar @$bugs;
# update
die "No bugs found\n" unless $count;
print
"Found $count open bug(s) with crash signatures\nPress <Ctrl-C> to stop or <Enter> to continue..\n";
getc();
my $updated = 0;
foreach my $rh_bug (@$bugs) {
my $bug_id = $rh_bug->{bug_id};
my $signature = $rh_bug->{cf_crash_signature};
# check for updated signature
my $collapsed = collapse($signature);
next if is_same($signature, $collapsed);
# ignore signatures malformed in a way that would result in updating on each pass
next if $collapsed ne collapse($collapsed);
# update the bug, preventing bugmail
print "$bug_id\n";
$dbh->bz_start_transaction;
my $bug = Bugzilla::Bug->check($bug_id);
$bug->set_all({cf_crash_signature => $collapsed});
$bug->update();
$dbh->do("UPDATE bugs SET lastdiffed = delta_ts WHERE bug_id = ?",
undef, $bug_id);
$dbh->bz_commit_transaction;
# object caching causes us to consume a lot of memory
# process in batches
last if ++$updated == BATCH_SIZE;
}
print "Updated $updated bugs(s)\n";
sub is_same {
my ($old, $new) = @_;
$old =~ s/[\015\012]+/ /g;
$new =~ s/[\015\012]+/ /g;
return trim($old) eq trim($new);
}
sub collapse {
my ($crash_signature) = @_;
# ignore completely invalid signatures
return $crash_signature
unless $crash_signature =~ /\[/ && $crash_signature =~ /\]/;
# split
my @signatures = grep {/\S/}
extract_multiple($crash_signature, [sub { extract_bracketed($_[0], '[]') }]);
my @unbracketed = map { unbracketed($_) } @signatures;
foreach my $signature (@signatures) {
# ignore invalid signatures
next unless $signature =~ /^\s*\[/;
next if unbracketed($signature) =~ /\.\.\.$/;
# collpase
my $collapsed = collapse_crash_sig({
signature => $signature,
open => '<',
replacement_open => '<',
close => '>',
replacement_close => 'T>',
exceptions => [],
});
$collapsed = collapse_crash_sig({
signature => $collapsed,
open => '(',
replacement_open => '',
close => ')',
replacement_close => '',
exceptions => ['anonymous namespace', 'operator'],
});
$collapsed =~ s/\s+/ /g;
# ignore sigs that collapse down to nothing
next if $collapsed eq '[@ ]';
# don't create duplicates
my $unbracketed = unbracketed($collapsed);
next if any { $unbracketed eq $_ } @unbracketed;
push @signatures, $collapsed;
push @unbracketed, $unbracketed;
}
return join("\015\012", map { trim($_) } @signatures);
}
sub unbracketed {
my ($signature) = @_;
$signature =~ s/(^\s*\[\s*|\s*\]\s*$)//g;
return $signature;
}
# collapsing code lifted from socorro:
# https://github.com/mozilla/socorro/blob/master/socorro/processor/signature_utilities.py#L110
my ($target_counter, $exception_mode, @collapsed);
sub append_if_not_in_collapse_mode {
my ($character) = @_;
if (!$target_counter) {
push @collapsed, $character;
}
}
sub is_exception {
my ($exceptions, $remaining_original_line, $line_up_to_current_position) = @_;
foreach my $exception (@$exceptions) {
if (substr($remaining_original_line, 0, length($exception)) eq $exception) {
return 1;
}
if (substr($line_up_to_current_position, -length($exception)) eq $exception) {
return 1;
}
}
return 0;
}
sub collapse_crash_sig {
my ($params) = @_;
$target_counter = 0;
@collapsed = ();
$exception_mode = 0;
my $signature = $params->{signature};
for (my $i = 0; $i < length($signature); $i++) {
my $character = substr($signature, $i, 1);
if ($character eq $params->{open}) {
if (is_exception(
$params->{exceptions},
substr($signature, $i + 1),
substr($signature, 0, $i)
))
{
$exception_mode = 1;
append_if_not_in_collapse_mode($character);
next;
}
append_if_not_in_collapse_mode($params->{replacement_open});
$target_counter++;
}
elsif ($character eq $params->{close}) {
if ($exception_mode) {
append_if_not_in_collapse_mode($character);
$exception_mode = 0;
}
else {
$target_counter--;
append_if_not_in_collapse_mode($params->{replacement_close});
}
}
else {
append_if_not_in_collapse_mode($character);
}
}
return join '', @collapsed;
}
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