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Diffstat (limited to 'dbilogstrip.PL')
-rw-r--r-- | dbilogstrip.PL | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/dbilogstrip.PL b/dbilogstrip.PL new file mode 100644 index 0000000..3bad633 --- /dev/null +++ b/dbilogstrip.PL @@ -0,0 +1,71 @@ +# -*- perl -*- +my $file = $ARGV[0] || 'dbilogstrip'; + +my $script = <<'SCRIPT'; +~startperl~ + +=head1 NAME + +dbilogstrip - filter to normalize DBI trace logs for diff'ing + +=head1 SYNOPSIS + +Read DBI trace file C<dbitrace.log> and write out a stripped version to C<dbitrace_stripped.log> + + dbilogstrip dbitrace.log > dbitrace_stripped.log + +Run C<yourscript.pl> twice, each with different sets of arguments, with +DBI_TRACE enabled. Filter the output and trace through C<dbilogstrip> into a +separate file for each run. Then compare using diff. (This example assumes +you're using a standard shell.) + + DBI_TRACE=2 perl yourscript.pl ...args1... 2>&1 | dbilogstrip > dbitrace1.log + DBI_TRACE=2 perl yourscript.pl ...args2... 2>&1 | dbilogstrip > dbitrace2.log + diff -u dbitrace1.log dbitrace2.log + +=head1 DESCRIPTION + +Replaces any hex addresses, e.g, C<0x128f72ce> with C<0xN>. + +Replaces any references to process id or thread id, like C<pid#6254> with C<pidN>. + +So a DBI trace line like this: + + -> STORE for DBD::DBM::st (DBI::st=HASH(0x19162a0)~0x191f9c8 'f_params' ARRAY(0x1922018)) thr#1800400 + +will look like this: + + -> STORE for DBD::DBM::st (DBI::st=HASH(0xN)~0xN 'f_params' ARRAY(0xN)) thrN + +=cut + +use strict; + +while (<>) { + # normalize hex addresses: 0xDEADHEAD => 0xN + s/ \b 0x [0-9a-f]+ /0xN/gx; + # normalize process and thread id number + s/ \b (pid|tid|thr) \W? \d+ /${1}N/gx; + +} continue { + print or die "-p destination: $!\n"; +} + + +SCRIPT + +require Config; +my $config = {}; +$config->{'startperl'} = $Config::Config{'startperl'}; + +$script =~ s/\~(\w+)\~/$config->{$1}/eg; +if (!(open(FILE, ">$file")) || + !(print FILE $script) || + !(close(FILE))) { + die "Error while writing $file: $!\n"; +} +chmod 0755, $file; +print "Extracted $file from ",__FILE__," with variable substitutions.\n"; +# syntax check resulting file, but only for developers +exit 1 if -d ".svn" and system($^X, '-wc', '-Mblib', $file) != 0; + |