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# Copyright (c) 2012 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Author: Uri Wiener
#
# Script which takes two config.ini files and generates a semantic diff. The
# resulting diff shows which parts of the configurations differed, and in the
# case that there is a difference it displays it. This allows rapid comparision
# of two gem5 runs and therefore provides an easy method to ensure that
# configurations are similar, or not.
#!/usr/bin/perl
use strict;
die "Please check args... " unless ($#ARGV == 1);
my $config1FileName = $ARGV[0];
my $config2FileName = $ARGV[1];
# Get just the name of the file, rather than the full path
my $config1ShortName = getFilenameFromPath($config1FileName);
my $config2ShortName = getFilenameFromPath($config2FileName);
# If the file names are the same, use the full path
if ($config1ShortName == $config2ShortName) {
$config1ShortName = $config1FileName;
$config2ShortName = $config2FileName;
}
print "\nComparing the following files:\n",
"\t$config1FileName\n",
"\tvs.\n",
"\t$config2FileName\n\n";
# Read in the two config files
my %config1 = readConfig($config1FileName);
my %config2 = readConfig($config2FileName);
# Compare the two config files. For the first comparision we also compare the
# values (setting the first parameter to 1). There is little point doing this
# for the second comparison as it will yield the same information.
compareConfigs( 1, \%config1, $config1ShortName, \%config2, $config2ShortName );
compareConfigs( 0, \%config2, $config2ShortName, \%config1, $config1ShortName );
########################################################
# Compare values and return unique values
########################################################
sub compareValues {
my $values1 = shift;
my $values2 = shift;
my @splitValues1 = split(/ /, $values1);
my @splitValues2 = split(/ /, $values2);
my @uniqueValues;
foreach my $val1 (@splitValues1) {
my $foundMatch = 0;
# if both values equal set match flag, then break loop
foreach my $val2 (@splitValues2) {
if ($val1 eq $val2) {
$foundMatch = 1;
last;
}
# in case of ports, ignore port number and match port name only
if ($val1 =~ /\[/ and $val2 =~ /\[/) {
$val1 =~ m/^(.*)\[.*\]/;
my $val1Name = $1;
$val2 =~ m/^(.*)\[.*\]/;
my $val2Name = $1;
# if both values equal set match flag, then break loop
if ($val1Name eq $val2Name) {
$foundMatch = 1;
last;
}
}
}
# Otherwise, the value is unique.
if (not $foundMatch) {
push(@uniqueValues, $val1);
}
}
return join(", ", @uniqueValues);
}
########################################################
# Compare two config files. Print differences.
########################################################
sub compareConfigs {
my $compareFields = shift; # Specfy if the fields should be compared
my $config1Ref = shift; # Config 1
my $config1Name = shift; # Config 1 name
my $config2Ref = shift; # Config 2
my $config2Name = shift; # Config 2 name
my @uniqueSections;
foreach my $sectionName ( sort keys %$config1Ref ) {
# check if section exists in config2
if ( not exists $config2Ref->{$sectionName} ) {
push(@uniqueSections, $sectionName);
next;
}
my %section1 = %{ $config1Ref->{$sectionName} };
my %section2 = %{ $config2Ref->{$sectionName} };
my $firstDifInSection = 1;
if (not $compareFields) {
next;
}
# Compare the values of each field; print any differences
foreach my $field ( sort keys %section1 ) {
if ($section1{$field} ne $section2{$field}) {
my $diff1 = compareValues($section1{$field}, $section2{$field});
my $diff2 = compareValues($section2{$field}, $section1{$field});
# If same, skip to next iteration
if ($diff1 eq "" and $diff2 eq "") {
next;
}
# If it is the first difference in this section, print section
# name
if ($firstDifInSection) {
print "$sectionName\n";
$firstDifInSection = 0;
}
# Print the actual differences
print "\t$field\n";
if ($diff1 ne "") {
print "\t\t$config1Name: ", $diff1, "\n";
}
if ($diff2 ne "") {
print "\t\t$config2Name: ", $diff2, "\n";
}
} # end if
} # end foreach field
} # end foreach section
# If there are unique sections, print them
if ($#uniqueSections != -1) {
print "Sections which exist only in $config1Name: ",
join(", ", @uniqueSections), "\n";
}
}
########################################################
# Split the path to get just the filename
########################################################
sub getFilenameFromPath {
my $filename = shift; # the input filename including path
my @splitName = split(/\//, $filename);
return $splitName[$#splitName]; # return just the filename, without path
}
########################################################
# Read in the config file section by section.
########################################################
sub readConfig {
my $filename = shift;
my %config;
open CONFIG, "<$filename" or die $!;
while ( my $line = <CONFIG> ) {
if ( $line =~ /^\[.*\]$/ ) {
readSection( $line, \%config );
}
}
close CONFIG;
return %config;
}
########################################################
# Read in each section of the config file.
########################################################
sub readSection {
my $line = shift;
my $config_ref = shift;
$line =~ m/\[(.*)\]/;
my $sectionName = $1;
while ( my $line = <CONFIG> ) {
if ( $line =~ /^$/ ) {
last;
}
my @field = split( /=/, $line );
my $fieldName = $field[0];
my $value = $field[1];
chomp $value;
$config_ref->{$sectionName}{$fieldName} = $value;
}
}
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