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#!/usr/bin/perl -w

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# Copyright (C) 2007 Apple Inc. All rights reserved.
# Copyright (C) 2007 Eric Seidel <eric@webkit.org>
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#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. 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.
#
# THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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. 

use strict;
use Getopt::Long;
use File::Basename;
use Cwd;

my $showHelp = 0;
my $runShark = 0;
my $jsShellPath;
my $testsPattern;
my $testRuns = 5; # This number may be different from what ./sunspider defaults to (that's OK)

my $programName = basename($0);
my $usage = <<EOF;
Usage: $programName --shell=[path] [options]
  --help        Show this help message
  --shell       Path to javascript shell
  --runs        Number of times to run tests (default: $testRuns)
  --tests       Only run tests matching provided pattern
  --shark       Sample with the Mac OS X "Shark" performance testing tool (implies --runs=1)
EOF

GetOptions('runs=i' => \$testRuns,
           'shell=s' => \$jsShellPath,
           'shark' => \$runShark,
           'tests=s' => \$testsPattern,
           'help' => \$showHelp);

$testRuns = 1  if $runShark;

if (!$jsShellPath || $showHelp) {
   print STDERR $usage;
   exit 1;
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}

sub dumpToFile($$)
{
    my ($contents, $path) = @_;
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    open FILE, ">", $path or die;
    print FILE $contents;
    close FILE;
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}

# FIXME: these globals are rather poor abstraction
my @tests = ();
my @categories = ();
my %uniqueCategories = ();
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sub loadTestsList()
{
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    open TESTLIST, "<", "tests/LIST" or die;
    while (<TESTLIST>) {
        chomp;
        next unless !$testsPattern || /$testsPattern/;
        
        push @tests, $_;
        my $category = $_;
        $category =~ s/-.*//;
        if (!$uniqueCategories{$category}) {
            push @categories, $category;
            $uniqueCategories{$category} = $category;
        }
    }
    close TESTLIST;
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}

sub writePrefixFile()
{
    my $prefix = "var tests = [ " . join(", ", map { '"' . $_ . '"' } @tests) . " ];\n";
    $prefix .= "var categories = [ " . join(", ", map { '"' . $_ . '"' } @categories) . " ];\n";
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    mkdir "tmp";
    dumpToFile($prefix, "tmp/sunspider-test-prefix.js");
}
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sub runTestsOnce($)
{
    my ($useShark) = @_;
    my $shellArgs = "-f tmp/sunspider-test-prefix.js -f resources/sunspider-standalone-driver.js 2> /dev/null";
    my $output;
    if ($useShark) {
        $output = `shark -i -1 -q "$jsShellPath" $shellArgs`;
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        $output = `"$jsShellPath" $shellArgs | grep -v break`;
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    }
    return $output;
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}

loadTestsList();
if ($testsPattern) {
    print STDERR "Found " . scalar(@tests) . " tests matching '" . $testsPattern . "'\n";
} else {
    print STDERR "Found " . scalar(@tests) . " tests\n";
}
die "No tests to run"  unless scalar(@tests);
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print STDERR "Running SunSpider once for warmup, then $testRuns time" . ($testRuns == 1 ? "" : "s") . ($runShark ? " under Shark" : "") . "\n";
writePrefixFile();
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runTestsOnce(0);
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print "Discarded first run.\n";

my $result;
my $count = 0;
my @results = ();
my $total = 0;
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print "[";
while ($count++ < $testRuns) {
    $result = runTestsOnce($runShark);
    $result =~ s/\r\n/\n/g;
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    chomp $result;
    push @results, $result;
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    print $result;
    print ",\n" unless ($count == $testRuns);
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}
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print "]\n";
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my $output = "var output = [\n" . join(",\n", @results) . "\n];\n";
dumpToFile($output, "tmp/sunspider-results.js");
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system("$jsShellPath", "-f", "tmp/sunspider-test-prefix.js", "-f", "tmp/sunspider-results.js", "-f", "resources/sunspider-analyze-results.js");
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if ($runShark) {
    my $newestAge = 0;
    my $newestMShark = 0;
    opendir DIR, "." or die;
    for my $file (readdir DIR) {
        if ($file =~ /\.mshark$/) {
            my $age = -M $file;
            if ($age < $newestAge) {
                $newestMShark = $file;
                $newestAge = $age;
            }
        }
    }
    closedir DIR;
    exec "/usr/bin/open", $newestMShark if $newestMShark;
}