scripts/find-alive.pl

   1 #!/usr/bin/perl -w
   2
   3 # Reads cache.log from STDIN, preferrably with full debugging enabled.
   4 # Finds creation and destruction messages for a given class.
   5 # At the end, reports log lines that correspond to still-alive objects.
   6 # Also reports the number of objects found (total and still-alive).
   7 #
   8 # Many classes have unique creation/destruction line patterns so we
   9 # have to hard-code those patterns in the %Pairs table below. That
  10 # table usually contains a few outdated entries.
  11
  12 use strict;
  13 use warnings;
  14
  15 my $Thing = $ARGV[0] or die("usage: $0 <Thing-to-look-for>\n");
  16
  17 # When creation and destriction messages are standardizes, we
  18 # will be able to support any class without this hard-coded table.
  19 # We try to do that now (see "guessing ..." below), but it does
  20 # not always work.
  21 my %Pairs = (
  22         AsyncCall => [
  23                 'AsyncCall.* constructed, this=(\S+)',
  24                 'AsyncCall.* destruct.*, this=(\S+)',
  25         ],
  26         HttpReq => [
  27                 '\bHttpRequest.* constructed, this=(\S+)',
  28                 '\bHttpRequest.* destructed, this=(\S+)',
  29         ],
  30         ClientSocketContext => [
  31                 '\bClientSocketContext constructing, this=(\S+)',
  32                 '\bClientSocketContext destructed, this=(\S+)',
  33         ],
  34         ICAP => [
  35                 '(?:ICAP|Icap).* constructed, this=(\S+)',
  36                 '(?:ICAP|Icap).* destruct.*, this=(\S+)',
  37         ],
  38         IcapModXact => [
  39                 'Adaptation::Icap::ModXact.* constructed, this=(\S+)',
  40                 'Adaptation::Icap::ModXact.* destruct.*, this=(\S+)',
  41         ],
  42         ICAPClientReqmodPrecache => [
  43                 'ICAPClientReqmodPrecache constructed, this=(\S+)',
  44                 'ICAPClientReqmodPrecache destruct.*, this=(\S+)',
  45         ],
  46         HttpStateData => [
  47                 'HttpStateData (\S+) created',
  48                 'HttpStateData (\S+) destroyed',
  49         ],
  50         cbdata => [
  51                 'HttpStateData (\S+) created',
  52                 'cbdataFree: Freeing (\S+)',
  53         ],
  54 );
  55
  56 if (!$Pairs{$Thing}) {
  57     warn("guessing construction/destruction pattern for $Thing\n");
  58     $Pairs{$Thing} = [
  59                 "\\b$Thing construct.*, this=(\\S+)",
  60                 "\\b$Thing destruct.*, this=(\\S+)",
  61         ];
  62 }
  63
  64 die("unsupported Thing, stopped") unless $Pairs{$Thing};
  65
  66 my $reConstructor = $Pairs{$Thing}->[0];
  67 my $reDestructor = $Pairs{$Thing}->[1];
  68
  69 my %Alive = ();
  70 my $Count = 0;
  71 while (<STDIN>) {
  72         if (/$reConstructor/) {
  73                 #die($_) if $Alive{$1};
  74                 $Alive{$1} = $_;
  75                 ++$Count;
  76         }
  77         elsif (/$reDestructor/) {
  78                 #warn("unborn: $_") unless $Alive{$1};
  79                 $Alive{$1} = undef();
  80         }
  81 }
  82
  83 printf(STDERR "Found %d %s\n", $Count, $Thing);
  84
  85 my $AliveCount = 0;
  86 foreach my $alive (sort grep { defined($_) } values %Alive) {
  87         next unless defined $alive;
  88         printf("Alive: %s", $alive);
  89         ++$AliveCount;
  90 }
  91
  92 printf(STDERR "found %d still-alive %s\n", $AliveCount, $Thing);
  93
  94 exit(0);