#!/usr/bin/perl
use strict; use warnings;
sub Log;
die "Usage: $0 <filename>\n" unless @ARGV == 1;
my $logfile = shift;
# Pass #1 : gather line numbers to be deleted.
my %locks; # Hash of currently open locks.
my @unlock_lines; # lines to rid ourselves of
open(LOGFILE,$logfile) or die "Can't read $logfile - $!\n";
while (<LOGFILE>) {
Log 2, "Analysing line $.";
next unless /Mutex\((.*?)\)::(\w+)/;
my ($address,$action) = ($1,$2);
if ($action eq 'locking') {
Log 2, "Address $address locked at line $.";
if (defined $locks{$address}) {
Log 0, "ERROR: Address $address locked at line $., but already l
+ocked at line $locks{$address}.";
}
$locks{$address} = $.;
}
if ($action eq 'unlocked') {
Log 2, "Address $address unlocked at line $.";
unless (defined $locks{$address}) {
Log 0, "ERROR: Address $address not locked, but unlocked at lin
+e $..";
} else {
push @unlock_lines, $., delete $locks{$address};
}
}
}
close LOGFILE;
# Sort the lines numbers that we've accumulated because we put them in
# unordered. This allows us to make just one more pass through the fil
+e
# to remove the lines.
@unlock_lines = sort { $a <=> $b } @unlock_lines;
# Pass #2: output all but the lines we're not interested in.
my $rmline = shift @unlock_lines;
open(LOGFILE,$logfile) or die "Can't read $logfile - $!\n";
while (<LOGFILE>) {
if (defined $rmline && $. == $rmline) {
$rmline = shift @unlock_lines;
next;
}
print;
}
close LOGFILE;
| 