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#!/usr/bin/perl -w
#
## Copyright (C) 1996-2025 The Squid Software Foundation and contributors
##
## Squid software is distributed under GPLv2+ license and includes
## contributions from numerous individuals and organizations.
## Please see the COPYING and CONTRIBUTORS files for details.
##
# Reads cache.log and displays lines that correspond to the master transaction
# that has a given async job. Master transaction is all activities tied to a
# a single received HTTP request (client side, ACL, ICAP, server side, etc.).
#
# See trace-job.pl for tracing a single job instead of all jobs related to
# a master transaction.
#
# Currently, many master transaction activities are not tracked because they
# do not use AsyncJob API. Eventually, most activities should be identifiable.
#
# Currently, the script reads and remembers all master transactions because it
# does not know which one should be tracked in advance. Eventually, we may
# have a more efficient way of tying master transaction to a job.
#
use strict;
use warnings;
my @InterestingJobs = @ARGV or die("usage: $0 <job id> ...\n");
my %Jobs = ();
my $inside = 0;
my $entering;
while (<STDIN>) {
$entering = $_ if !$inside && /[|:] entering\b/;
undef $entering if /[|:] leaving\b/;
if (!$inside && /\bstatus in\b.*\b(?:async|job|icapx)(\d+)\b/o) {
$inside = $1;
&enterJob($inside);
&updateJob($inside, $entering) if defined $entering;
undef $entering;
}
elsif (!$inside && /\b(?:async|job|icapx)(\d+)\b/o) {
updateJob($1, "$_\n"); # isolated line
}
next unless $inside;
&updateJob($inside, $_);
if (/AsyncJob constructed.*\[\S+?(\d+)\]/) {
&linkJobs($inside, $1, $_);
}
if (/[|:] leaving\b/) {
$inside = 0;
}
}
foreach my $id (@InterestingJobs) {
# Squid uses asyncNNN, jobNNN, icapxNNN for the same job/transaction
$id =~ s/^(?:async|job|icapx)(\d+)$/$1/;
reportJob($id, 1);
}
exit(0);
sub enterJob {
my ($id) = @_;
my $job = &getJob($id);
}
sub updateJob {
my ($id, $line) = @_;
my $job = &getJob($id);
$job->{history} .= $line;
if ($line =~ /\bFD (\d+)/) {
$job->{fds}->{$1} = 1;
}
}
sub linkJobs {
my ($parentId, $kidId, $line) = @_;
my $parent = $Jobs{$parentId} or die("missing linked job $parentId");
push @{$parent->{kids}}, $kidId;
my $kid = &getJob($kidId);
die("two parents for $kidId: ". $kid->{parent}. " and $parentId") if $kid->{parent};
$kid->{parent} = $parentId;
$kid->{history} .= $line; # birth
}
sub getJob {
my $id = shift;
my $job = $Jobs{$id};
return $job if $job;
$job = {
id => $id,
kids => [],
fds => {},
parent => undef(),
start => undef(),
history => '',
reported => 0,
};
$Jobs{$id} = $job;
return $job;
}
sub reportJob {
my ($id, $recursive) = @_;
my $job = $Jobs{$id} or die("Did not see job$id\n");
# several kids may try to report their common parent
return if $job->{reported};
$job->{reported} = 1;
&reportJob($job->{parent}, 0) if $job->{parent};
&reportJobParam($id, 'parent');
&reportJobParam($id, 'kids', join(', ', @{$job->{kids}}));
&reportJobParam($id, 'FDs', join(', ', keys %{$job->{fds}}));
&reportJobHistory($id);
return unless $recursive;
foreach my $kidId (@{$job->{kids}}) {
&reportJob($kidId, $recursive);
}
}
sub reportJobParam {
my ($id, $name, $value) = @_;
my $job = $Jobs{$id} or die;
$value = $job->{$name} if @_ < 3;
$value = '?' unless defined $value;
$value = "\n$value" if $value =~ /\n/m;
printf("job%d %s: %s\n", $id, $name, $value);
}
sub reportJobHistory {
my ($id) = @_;
my $job = $Jobs{$id} or die;
my $history = $job->{history};
my @lines = split(/\n/, $history);
&reportJobParam($id, 'history', (scalar @lines) . " entries");
foreach my $line (@lines) {
print "$line\n";
print "\n" if $line =~ /[|:] leaving\b/;
}
}
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