#!./perl
# This is written in a peculiar style, since we're trying to avoid
# most of the constructs we'll be testing for.  (This comment is
# probably obsolete on the avoidance side, though still current
# on the peculiarity side.)
# t/TEST and t/harness need to share code. The logical way to do this would be
# to have the common code in a file both require or use. However, t/TEST needs
# to still work, to generate test results, even if require isn't working, so
# we cannot do that. t/harness has no such restriction, so it is quite
# acceptable to have it require t/TEST.
# In which case, we need to stop t/TEST actually running tests, as all
# t/harness needs are its subroutines.
# Measure the elapsed wallclock time.
my $t0 = time();
# If we're doing deparse tests, ignore failures for these
my $deparse_failures;
# And skip even running these
my $deparse_skips;
my $deparse_skip_file = '../Porting/deparse-skips.txt';
# directories with special sets of test switches
my %dir_to_switch =
    (base => '',
     comp => '',
     run => '',
     '../ext/File-Glob/t' => '-I.. -MTestInit', # FIXME - tests assume t/
     );
# "not absolute" is the default, as it saves some fakery within TestInit
# which can perturb tests, and takes CPU. Working with the upstream author of
# any of these, to figure out how to remove them from this list, considered
# "a good thing".
my %abs = (
           '../cpan/Archive-Tar' => 1,
           '../cpan/AutoLoader' => 1,
           '../cpan/CPAN' => 1,
           '../cpan/Encode' => 1,
           '../cpan/ExtUtils-Constant' => 1,
           '../cpan/ExtUtils-Install' => 1,
           '../cpan/ExtUtils-MakeMaker' => 1,
           '../cpan/ExtUtils-Manifest' => 1,
           '../cpan/File-Fetch' => 1,
           '../cpan/IPC-Cmd' => 1,
           '../cpan/IPC-SysV' => 1,
           '../cpan/Module-Load' => 1,
           '../cpan/Module-Load-Conditional' => 1,
           '../cpan/Pod-Simple' => 1,
           '../cpan/Test-Simple' => 1,
           '../cpan/podlators' => 1,
           '../dist/Cwd' => 1,
           '../dist/Devel-PPPort' => 1,
           '../dist/ExtUtils-ParseXS' => 1,
           '../dist/Tie-File' => 1,
          );
my %temp_no_core = (
     '../cpan/Compress-Raw-Bzip2' => 1,
     '../cpan/Compress-Raw-Zlib' => 1,
     '../cpan/Devel-PPPort' => 1,
     '../cpan/Getopt-Long' => 1,
     '../cpan/IO-Compress' => 1,
     '../cpan/MIME-Base64' => 1,
     '../cpan/parent' => 1,
     '../cpan/Pod-Simple' => 1,
     '../cpan/podlators' => 1,
     '../cpan/Test-Simple' => 1,
     '../cpan/Tie-RefHash' => 1,
     '../cpan/Unicode-Collate' => 1,
     '../dist/Unicode-Normalize' => 1,
    );
# delete env vars that may influence the results
# but allow override via *_TEST env var if wanted
# (e.g. PERL5OPT_TEST=-d:NYTProf)
my @bad_env_vars = qw(
    PERL5LIB PERLLIB PERL5OPT PERL_UNICODE
    PERL_YAML_BACKEND PERL_JSON_BACKEND
);
for my $envname (@bad_env_vars) {
    my $override = $ENV{"${envname}_TEST"};
    if (defined $override) {
        warn "$0: $envname=$override\n";
        $ENV{$envname} = $override;
    }
    else {
        delete $ENV{$envname};
    }
}
# Location to put the Valgrind log.
our $Valgrind_Log;
my %skip = (
            '.' => 1,
            '..' => 1,
            'CVS' => 1,
            'RCS' => 1,
            'SCCS' => 1,
            '.svn' => 1,
           );
if ($::do_nothing) {
    return 1;
}
$| = 1;
# for testing TEST only
#BEGIN { require '../lib/strict.pm'; "strict"->import() };
#BEGIN { require '../lib/warnings.pm'; "warnings"->import() };
my $OS = $ENV{FAKE_OS} || $^O;
my $is_vms   = $OS eq "VMS";
my $is_win32 = $OS eq "MSWin32";
my $is_os2   = $OS eq "os2";
# remove empty elements due to insertion of empty symbols via "''p1'" syntax
@ARGV = grep($_,@ARGV) if $is_vms;
our $show_elapsed_time = $ENV{HARNESS_TIMER} || 0;
my $dump_tests = 0;
# Cheesy version of Getopt::Std.  We can't replace it with that, because we
# can't rely on require working.
{
    my %opt_vars = (
        benchmark => \$::benchmark,
        core      => \$::core,
        v         => \$::verbose,
        torture   => \$::torture,
        utf8      => \$::with_utf8,
        utf16     => \$::with_utf16,
        taintwarn => \$::taintwarn,
        dumptests => \$dump_tests,
    );
    my @argv = ();
    foreach my $idx (0..$#ARGV) {
        my $opt;
        if ($ARGV[$idx] =~ /^-?-(\S+)$/) {
            $opt = $1;
        } else {
            push @argv, $ARGV[$idx];
            next;
        }
        if (my $ref = $opt_vars{$opt}) {
            $$ref = 1;
        }
        elsif ($opt =~ /^deparse(,.+)?$/) {
            $::deparse = 1;
            $::deparse_opts = $1;
            _process_deparse_config();
        }
        else {
            die "Unknown option '$opt'\n";
        }
    }
    @ARGV = @argv;
}
chdir 't' if -f 't/TEST';
if (-f 'TEST' && -f 'harness' && -d '../lib') {
    @INC = '../lib';
}
die "You need to run \"make test_prep\" first to set things up.\n"
  unless -e 'perl' or -e 'perl.exe' or -e 'perl.pm';
if ($is_win32) {
    # String eval to avoid loading File::Glob on non-miniperl.
    # (Windows only uses this script for miniperl.)
    my @argv;
    if (eval '@argv = map glob, @ARGV; 1') {
        @ARGV = @argv;
    } else {
        die "Failed to glob \@ARGV: $@";
    }
}
# check leakage for embedders
$ENV{PERL_DESTRUCT_LEVEL} = 2 unless exists $ENV{PERL_DESTRUCT_LEVEL};
# check existence of all symbols
$ENV{PERL_DL_NONLAZY} = 1 unless exists $ENV{PERL_DL_NONLAZY};
$ENV{EMXSHELL} = 'sh';        # For OS/2
if ($show_elapsed_time) { require Time::HiRes }
my %timings = (); # testname => [@et] pairs if $show_elapsed_time.
# Roll your own File::Find!
our @found;
sub _find_tests { @found=(); push @ARGV, _find_files('\.t$', $_[0]) }
sub _find_files {
    my($patt, @dirs) = @_;
    for my $dir (@dirs) {
        opendir DIR, $dir or die "Trouble opening $dir: $!";
        foreach my $f (sort { $a cmp $b } readdir DIR) {
            next if $skip{$f};
            $dir =~ s/(?<!\^)\.dir(;1)?$//i if $is_vms; # trim .DIR extension
            my $fullpath = "$dir/$f";
            if (-d $fullpath) {
                _find_files($patt, $fullpath);
            } elsif ($f =~ /$patt/) {
                push @found, $fullpath;
            }
        }
    }
    @found;
}
# Scan the text of the test program to find switches and special options
# we might need to apply.
sub _scan_test {
    my($test, $type) = @_;
    open(my $script, "<", $test) or die "Can't read $test.\n";
    my $first_line = <$script>;
    $first_line =~ tr/\0//d if $::with_utf16;
    my $switch = "";
    if ($first_line =~ /#!.*\bperl.*\s-\w*([tT])/) {
        $switch = "-$1";
    } else {
        if ($::taintwarn) {
            # not all tests are expected to pass with this option
            $switch = '-t';
        } else {
            $switch = '';
        }
    }
    my $file_opts = "";
    if ($type eq 'deparse') {
        # Look for #line directives which change the filename
        while (<$script>) {
            $file_opts = $file_opts . ",-f$3$4"
              if /^#\s*line\s+(\d+)\s+((\w+)|"([^"]+)")/;
        }
    }
    close $script;
    my $perl = $is_win32 ? '.\perl' : './perl';
    my $lib  = '../lib';
    my $run_dir;
    my $return_dir;
    $test =~ /^(.+)\/[^\/]+/;
    my $dir = $1;
    my $testswitch = $dir_to_switch{$dir};
    if (!defined $testswitch) {
        if ($test =~ s!^(\.\./(cpan|dist|ext)/[^/]+)/t!t!) {
            $run_dir = $1;
            $return_dir = '../../t';
            $lib = '../../lib';
            $perl = '../../t/perl';
            $testswitch = "-I../.. -MTestInit=U2T";
            if ($2 eq 'cpan' || $2 eq 'dist') {
                if($abs{$run_dir}) {
                    $testswitch = $testswitch . ',A';
                }
                if ($temp_no_core{$run_dir}) {
                    $testswitch = $testswitch . ',NC';
                }
            }
        } elsif ($test =~ m!^\.\./lib!) {
            $testswitch = '-I.. -MTestInit=U1'; # -T will remove . from @INC
        } else {
            $testswitch = '-I.. -MTestInit';  # -T will remove . from @INC
        }
    }
    my $utf8 = ($::with_utf8 || $::with_utf16) ? "-I$lib -Mutf8" : '';
    my %options = (
        perl => $perl,
        lib => $lib,
        test => $test,
        run_dir => $run_dir,
        return_dir => $return_dir,
        testswitch => $testswitch,
        utf8 => $utf8,
        file => $file_opts,
        switch => $switch,
    );
    return \%options;
}
sub _cmd {
    my($options, $type) = @_;
    my $test = $options->{test};
    my $cmd;
    if ($type eq 'deparse') {
        my $perl = "$options->{perl} $options->{testswitch}";
        my $lib = $options->{lib};
        $cmd = (
          "$perl $options->{switch} -I$lib -MO=-qq,Deparse,-sv1.,".
          "-l$::deparse_opts$options->{file} ".
          "$test > $test.dp ".
          "&& $perl $options->{switch} -I$lib $test.dp"
        );
    }
    elsif ($type eq 'perl') {
        my $perl = $options->{perl};
        my $redir = $is_vms ? '2>&1' : '';
        if ($ENV{PERL_VALGRIND}) {
            my $perl_supp = $options->{return_dir} ? "$options->{return_dir}/perl.supp" : "perl.supp";
            my $valgrind_exe = $ENV{VALGRIND} // 'valgrind';
            if ($options->{run_dir}) {
                require Cwd;
                $Valgrind_Log = Cwd::abs_path("$options->{run_dir}/$Valgrind_Log");
            }
            my $vg_opts = $ENV{VG_OPTS}
               //   "--log-file=$Valgrind_Log "
                  . "--suppressions=$perl_supp --leak-check=yes "
                  . "--leak-resolution=high --show-reachable=yes "
                  . "--num-callers=50 --track-origins=yes";
            # Force logging if not asked for (so cachegrind reporting works below)
            if ($vg_opts !~ /--log-file/) {
                $vg_opts = "--log-file=$Valgrind_Log $vg_opts";
            }
            $perl = "$valgrind_exe $vg_opts $perl";
        }
        my $args = "$options->{testswitch} $options->{switch} $options->{utf8}";
        $cmd = $perl . _quote_args($args) . " $test $redir";
    }
    return $cmd;
}
sub _before_fork {
    my ($options) = @_;
    if ($options->{run_dir}) {
        my $run_dir = $options->{run_dir};
        chdir $run_dir or die "Can't chdir to '$run_dir': $!";
    }
    # Remove previous valgrind output otherwise it will interfere
    my $test = $options->{test};
    (local $Valgrind_Log = "$test.valgrind-current") =~ s/^.*\///;
    if ($ENV{PERL_VALGRIND} && -e $Valgrind_Log) {
        unlink $Valgrind_Log
            or warn "$0: Failed to unlink '$Valgrind_Log': $!\n";
    }
    return;
}
sub _after_fork {
    my ($options) = @_;
    if ($options->{return_dir}) {
        my $return_dir = $options->{return_dir};
        chdir $return_dir
           or die "Can't chdir from '$options->{run_dir}' to '$return_dir': $!";
    }
    return;
}
sub _run_test {
    my ($test, $type) = @_;
    my $options = _scan_test($test, $type);
    # $test might have changed if we're in ext/Foo, so don't use it anymore
    # from now on. Use $options->{test} instead.
    _before_fork($options);
    my $cmd = _cmd($options, $type);
    open(my $results, "$cmd |") or print "can't run '$cmd': $!.\n";
    _after_fork($options);
    # Our environment may force us to use UTF-8, but we can't be sure that
    # anything we're reading from will be generating (well formed) UTF-8
    # This may not be the best way - possibly we should unset ${^OPEN} up
    # top?
    binmode $results;
    return $results;
}
sub _quote_args {
    my ($args) = @_;
    my $argstring = '';
    foreach (split(/\s+/,$args)) {
       # In VMS protect with doublequotes because otherwise
       # DCL will lowercase -- unless already doublequoted.
       $_ = q(").$_.q(") if $is_vms && !/^\"/ && length($_) > 0;
       $argstring = $argstring . ' ' . $_;
    }
    return $argstring;
}
sub _populate_hash {
    return unless defined $_[0];
    return map {$_, 1} split /\s+/, $_[0];
}
sub _tests_from_manifest {
    my ($extensions, $known_extensions, $all) = @_;
    s/\bCwd\b/PathTools/, s!\bList/Util\b!Scalar/List/Utils!
        for $extensions, $known_extensions;
    my %skip;
    my %extensions = _populate_hash($extensions);
    my %known_extensions = _populate_hash($known_extensions);
    my %printed_skip_warning;
    foreach (keys %known_extensions) {
        $skip{$_} = 1 unless $extensions{$_};
    }
    my @results;
    my %non_ext;
    push @results, \%non_ext if $all;
    my $mani = '../MANIFEST';
    if (open(MANI, $mani)) {
        while (<MANI>) {
            chomp;
            my ($file)= split /\t/, $_;
            if ($file =~ m!^((?:cpan|dist|ext)/(\S+)/+(?:[^/\s]+\.t|test\.pl)|lib/\S+?(?:\.t|test\.pl))\z!) {
                my $t = $1;
                my $extension = $2;
                if (    ord "A" != 65
                     && defined $extension
                     && $extension =~ m! \b (?:
                                                Archive-Tar/
                                              | Config-Perl-V/
                                              | CPAN-Meta/
                                              | CPAN-Meta-YAML/
                                              | Digest-SHA/
                                              | ExtUtils-MakeMaker/
                                              | HTTP-Tiny/
                                              | IO-Compress/
                                              | JSON-PP/
                                              | libnet/
                                              | MIME-Base64/
                                              | podlators/
                                              | Pod-Simple/
                                              | Pod-Checker/
                                              | Digest-MD5/
                                              | Test-Harness/
                                              | IPC-Cmd/
                                              | Encode/
                                              | Socket/
                                              | ExtUtils-Manifest/
                                              | Module-Metadata/
                                              | PerlIO-via-QuotedPrint/
                                            )
                                       !x)
                {
                    print STDERR "Skipping testing of $extension on EBCDIC\n"
                                     unless $printed_skip_warning{$extension}++;
                    next;
                }
                if (!$::core || $t =~ m!^lib/[a-z]!) {
                    if (defined $extension) {
                        $extension =~ s!/t(:?/\S+)*$!!;
                        # XXX Do I want to warn that I'm skipping these?
                        next if $skip{$extension};
                        my $flat_extension = $extension;
                        $flat_extension =~ s!-!/!g;
                        next if $skip{$flat_extension}; # Foo/Bar may live in Foo-Bar
                    }
                    my $path = "../$t";
                    push @results, $path;
                    $::path_to_name{$path} = $t;
                }
            }
            elsif ($file=~m!/(?:test\.pl|[^/\s]+\.t)\z! and $file ne "t/test.pl") {
                my $munged = $file;
                next if $munged=~m!^(?:t/)?os2/!        and !$is_os2;
                next if $munged=~m!^(?:t/)?win32/!      and !$is_win32;
                next if $munged=~m!^(?:t/)?japh/!       and !($::torture or $ENV{PERL_TORTURE_TEST});
                next if $munged=~m!^(?:t/)?benchmark/!  and !($::benchmark or $ENV{PERL_BENCHMARK});
                next if $munged=~m!^(?:t/)?bigmem/!     and !$ENV{PERL_TEST_MEMORY};
                $munged =~ s!t/!! or $munged = "../$munged";
                $non_ext{$munged}++;
            }
        }
        close MANI;
    } else {
        warn "$0: cannot open $mani: $!\n";
    }
    return @results;
}
sub dump_tests {
    my ($ary) = @_;
    for my $test (sort @$ary) {
        # convert it to a path from the root of the repo
        $test=~s!^\.\./!! or $test=~s!^!t/!;
        print "$test\n";
    }
    exit(0);
}
sub filter_taint_tests {
    my $tests = shift;
    require Config;
    return unless $Config::Config{taint_disabled} eq "define";
    # These are test files which are known to fail with -DNO_TAINT_SUPPORT
    # but which do not have "taint" in their name, nor have shebang lines
    # with -t or -T in them. So we exclude them specifically instead.
    my %known_tainter = map { $_ => 0 } (
        '../cpan/Test-Harness/t/regression.t',
        '../cpan/Test-Harness/t/source_handler.t',
        '../cpan/Test-Harness/t/compat/inc-propagation.t',
    );
    @$tests = grep {
        my $file = $_;
        open my $ifh, "<", $file
            or die "Failed to read: '$file': $!";
        my $line = <$ifh>;
        my $keep = $file=~/taint/ ? 0 : ($known_tainter{$file} // 1);
        if ($line=~/^#!.*perl\s+-(\w+)/) {
            my $switch = $1;
            if ($switch =~ s/[Tt]//) {
                $keep = 0;
            }
        }
        $keep
    } @$tests;
}
unless (@ARGV) {
    # base first, as TEST bails out if that can't run
    # then comp, to validate that require works
    # then run, to validate that -M works
    # then we know we can -MTestInit for everything else, making life simpler
    # NOTE that _find_tests() is recursive, unlike what test_harness uses.
    foreach my $dir (qw(base comp run cmd io re opbasic op uni mro class perf test_pl)) {
        _find_tests($dir);
    }
    unless ($::core) {
        _find_tests('porting');
        _find_tests("lib");
    }
    _find_tests('win32') if $is_win32;
    _find_tests('os2')   if $is_os2;
    # Config.pm may be broken for make minitest. And this is only a refinement
    # for skipping tests on non-default builds, so it is allowed to fail.
    # What we want to do is make a list of extensions which we did not build.
    my $configsh = '../config.sh';
    my ($extensions, $known_extensions);
    if (-f $configsh) {
        open FH, $configsh or die "Can't open $configsh: $!";
        while (<FH>) {
            if (/^extensions=['"](.*)['"]$/) {
                $extensions = $1;
            }
            elsif (/^known_extensions=['"](.*)['"]$/) {
                $known_extensions = $1;
            }
        }
        if (!defined $known_extensions) {
            warn "No known_extensions line found in $configsh";
        }
        if (!defined $extensions) {
            warn "No extensions line found in $configsh";
        }
    }
    # The "complex" constructions of list return from a subroutine, and push of
    # a list, might fail if perl is really hosed, but they aren't needed for
    # make minitest, and the building of extensions will likely also fail if
    # something is that badly wrong.
    push @ARGV, _tests_from_manifest($extensions, $known_extensions);
    unless ($::core) {
        _find_tests('japh') if $::torture or $ENV{PERL_TORTURE_TEST};
        _find_tests('benchmark') if $::benchmark or $ENV{PERL_BENCHMARK};
        _find_tests('bigmem') if $ENV{PERL_TEST_MEMORY};
    }
}
@ARGV= do {
    my @order= (
        "test_pl",
        "base",
        "comp",
        "run",
        "cmd",
        "io",
        "re",
        "opbasic",
        "op",
        "op/hook",
        "uni",
        "mro",
        "class",
        "lib",
        "ext",
        "dist",
        "cpan",
        "perf",
        "porting",
    );
    my %order= map { $order[$_] => 1+$_ } 0..$#order;
    my $idx= 0;
    map {
        $_->[0]
    } sort {
            $a->[3] <=> $b->[3] ||
            $a->[1] <=> $b->[1]
    } map {
        my $root= /(\w+)/ ? $1 : "";
        [ $_, $idx++, $root, $order{$root}||=0 ]
    } @ARGV;
};
dump_tests(\@ARGV) if $dump_tests;
filter_taint_tests(\@ARGV);
if ($::deparse) {
    _testprogs('deparse', '',   @ARGV);
}
elsif ($::with_utf16) {
    for my $e (0, 1) {
        for my $b (0, 1) {
            print STDERR "# ENDIAN $e BOM $b\n";
            my @UARGV;
            for my $a (@ARGV) {
                my $u = $a . "." . ($e ? "l" : "b") . "e" . ($b ? "b" : "");
                my $f = $e ? "v" : "n";
                push @UARGV, $u;
                unlink($u);
                if (open(A, $a)) {
                    if (open(U, ">$u")) {
                        print U pack("$f", 0xFEFF) if $b;
                        while (<A>) {
                            print U pack("$f*", unpack("C*", $_));
                        }
                        close(U);
                    }
                    close(A);
                }
            }
            _testprogs('perl', '', @UARGV);
            unlink(@UARGV);
        }
    }
}
else {
    _testprogs('perl',    '',   @ARGV);
}
sub _testprogs {
    my ($type, $args, @tests) = @_;
    print <<'EOT' if ($type eq 'deparse');
------------------------------------------------------------------------------
TESTING DEPARSER
------------------------------------------------------------------------------
EOT
    $::bad_files = 0;
    foreach my $t (@tests) {
      unless (exists $::path_to_name{$t}) {
        my $tname = "t/$t";
        $::path_to_name{$t} = $tname;
      }
    }
    my $maxlen = 0;
    foreach (@::path_to_name{@tests}) {
        s/\.\w+\z/ /; # space gives easy doubleclick to select fname
        my $len = length ;
        $maxlen = $len if $len > $maxlen;
    }
    # + 3 : we want three dots between the test name and the "ok"
    my $dotdotdot = $maxlen + 3 ;
    my $grind_ct = 0;           # count of non-empty valgrind reports
    my $total_files = @tests;
    my $good_files = 0;
    my $tested_files  = 0;
    my $totmax = 0;
    my %failed_tests;
    my @unexpected_pass; # files where deparse-skips.txt says fail but passed
    my $toolnm;         # valgrind, cachegrind, perf
    while (my $test = shift @tests) {
        my ($test_start_time, @starttimes) = 0;
        if ($show_elapsed_time) {
            $test_start_time = Time::HiRes::time();
            # times() reports usage by TEST, but we want usage of each
            # testprog it calls, so record accumulated times now,
            # subtract them out afterwards.  Ideally, we'd take times
            # in BEGIN/END blocks (giving better visibility of self vs
            # children of each testprog), but that would require some
            # IPC to send results back here, or a completely different
            # collection scheme (Storable isn't tuned for incremental use)
            @starttimes = times;
        }
        if ($test =~ /^$/) {
            next;
        }
        if ($type eq 'deparse' && $test =~ $deparse_skips) {
            next;
        }
        my $te = $::path_to_name{$test} . '.'
                    x ($dotdotdot - length($::path_to_name{$test})) .' ';
        if (!$is_vms) {  # defer printing on VMS due to piping bug
            print $te;
            $te = '';
        }
        (local $Valgrind_Log = "$test.valgrind-current") =~ s/^.*\///;
        my $results = _run_test($test, $type);
        my $failure;
        my $next = 0;
        my $seen_leader = 0;
        my $seen_ok = 0;
        my $trailing_leader = 0;
        my $max;
        my %todo;
        while (<$results>) {
            next if /^\s*$/; # skip blank lines
            if (/^1..$/ && $is_vms) {
                # VMS pipe bug inserts blank lines.
                my $l2 = <$results>;
                if ($l2 =~ /^\s*$/) {
                    $l2 = <$results>;
                }
                $_ = '1..' . $l2;
            }
            if ($::verbose) {
                print $_;
            }
            unless (/^\#/) {
                if ($trailing_leader) {
                    # shouldn't be anything following a postfix 1..n
                    $failure = 'FAILED--extra output after trailing 1..n';
                    last;
                }
                if (/^1\.\.([0-9]+)( todo ([\d ]+))?/) {
                    if ($seen_leader) {
                        $failure = 'FAILED--seen duplicate leader';
                        last;
                    }
                    $max = $1;
                    %todo = map { $_ => 1 } split / /, $3 if $3;
                    $totmax = $totmax + $max;
                    $tested_files = $tested_files + 1;
                    if ($seen_ok) {
                        # 1..n appears at end of file
                        $trailing_leader = 1;
                        if ($next != $max) {
                            $failure = "FAILED--expected $max tests, saw $next";
                            last;
                        }
                    }
                    else {
                        $next = 0;
                    }
                    $seen_leader = 1;
                }
                else {
                    if (/^(not )?ok(?: (\d+))?[^\#]*(\s*\#.*)?/) {
                        unless ($seen_leader) {
                            unless ($seen_ok) {
                                $next = 0;
                            }
                        }
                        $seen_ok = 1;
                        $next = $next + 1;
                        my($not, $num, $extra, $istodo) = ($1, $2, $3, 0);
                        $num = $next unless $num;
                        if ($num == $next) {
                            # SKIP is essentially the same as TODO for t/TEST
                            # this still conforms to TAP:
                            # http://testanything.org/wiki/index.php/TAP_specification
                            $extra and $istodo = $extra =~ /#\s*(?:TODO|SKIP)\b/;
                            $istodo = 1 if $todo{$num};
                            if( $not && !$istodo ) {
                                $failure = "FAILED at test $num";
                                last;
                            }
                        }
                        else {
                            $failure ="FAILED--expected test $next, saw test $num";
                            last;
                        }
                    }
                    elsif (/^Bail out!\s*(.*)/i) { # magic words
                        die "FAILED--Further testing stopped" . ($1 ? ": $1\n" : ".\n");
                    }
                    else {
                        # module tests are allowed extra output,
                        # because Test::Harness allows it
                        next if $test =~ /^\W*(cpan|dist|ext|lib)\b/;
                        $failure = "FAILED--unexpected output at test $next";
                        last;
                    }
                }
            }
        }
        my  @junk = <$results>;  # dump remaining output to prevent SIGPIPE
                                 # (so far happens only on os390)
        close $results;
        undef @junk;
        if (not defined $failure) {
            $failure = 'FAILED--no leader found' unless $seen_leader;
        }
        _check_valgrind(\$toolnm, \$grind_ct, \$test);
        if ($type eq 'deparse' && !$ENV{KEEP_DEPARSE_FILES}) {
            unlink "./$test.dp";
        }
        if (not defined $failure and $next != $max) {
            $failure="FAILED--expected $max tests, saw $next";
        }
        if( !defined $failure  # don't mask a test failure
            and $? )
        {
            $failure = "FAILED--non-zero wait status: $?";
        }
        # Deparse? Should it have passed or failed?
        if ($type eq 'deparse' && $test =~ $deparse_failures) {
            if (!$failure) {
                # Wait, it didn't fail? Great news!
                push @unexpected_pass, $test;
            } else {
                # Bah, still failing. Mask it.
                print "${te}skipped\n";
                $tested_files = $tested_files - 1;
                next;
            }
        }
        if (defined $failure) {
            print "${te}$failure\n";
            $::bad_files = $::bad_files + 1;
            if ($test =~ /^base/ && ! defined &DynaLoader::boot_DynaLoader) {
                # Die if running under minitest (no DynaLoader).  Otherwise
                # keep going, as  we know that Perl basically works, or we
                # would not have been able to actually compile it all the way.
                die "Failed a basic test ($test) under minitest -- cannot continue.\n";
            }
            $failed_tests{$test} = 1;
        }
        else {
            if ($max) {
                my ($elapsed, $etms) = ("", 0);
                if ( $show_elapsed_time ) {
                    $etms = (Time::HiRes::time() - $test_start_time) * 1000;
                    $elapsed = sprintf(" %8.0f ms", $etms);
                    my (@endtimes) = times;
                    $endtimes[$_] -= $starttimes[$_] for 0..$#endtimes;
                    splice @endtimes, 0, 2;    # drop self/harness times
                    $_ *= 1000 for @endtimes;  # and scale to ms
                    $timings{$test} = [$etms,@endtimes];
                    $elapsed .= sprintf(" %5.0f ms", $_) for @endtimes;
                }
                print "${te}ok$elapsed\n";
                $good_files = $good_files + 1;
            }
            else {
                print "${te}skipped\n";
                $tested_files = $tested_files - 1;
            }
        }
    } # while tests
    if ($::bad_files == 0) {
        if ($good_files) {
            print "All tests successful.\n";
            # XXX add mention of 'perlbug -ok' ?
        }
        else {
            die "FAILED--no tests were run for some reason.\n";
        }
    }
    else {
        my $pct = $tested_files ? sprintf("%.2f", ($tested_files - $::bad_files) / $tested_files * 100) : "0.00";
        my $s = $::bad_files == 1 ? "" : "s";
        warn "Failed $::bad_files test$s out of $tested_files, $pct% okay.\n";
        for my $test ( sort keys %failed_tests ) {
            print "\t$test\n";
        }
        if (@unexpected_pass) {
            print <<EOF;
The following scripts were expected to fail under -deparse (at least
according to $deparse_skip_file), but unexpectedly succeeded:
EOF
            print "\t$_\n" for sort @unexpected_pass;
            print "\n";
        }
        warn <<'SHRDLU_1';
### Since not all tests were successful, you may want to run some of
### them individually and examine any diagnostic messages they produce.
### See the INSTALL document's section on "make test".
SHRDLU_1
        warn <<'SHRDLU_2' if $good_files / $total_files > 0.8;
### You have a good chance to get more information by running
###   ./perl harness
### in the 't' directory since most (>=80%) of the tests succeeded.
SHRDLU_2
        if (eval {require Config; Config->import; 1}) {
            if ($::Config{usedl} && (my $p = $::Config{ldlibpthname})) {
                warn <<SHRDLU_3;
### You may have to set your dynamic library search path,
### $p, to point to the build directory:
SHRDLU_3
                if (exists $ENV{$p} && $ENV{$p} ne '') {
                    warn <<SHRDLU_4a;
###   setenv $p `pwd`:\$$p; cd t; ./perl harness
###   $p=`pwd`:\$$p; export $p; cd t; ./perl harness
###   export $p=`pwd`:\$$p; cd t; ./perl harness
SHRDLU_4a
                } else {
                    warn <<SHRDLU_4b;
###   setenv $p `pwd`; cd t; ./perl harness
###   $p=`pwd`; export $p; cd t; ./perl harness
###   export $p=`pwd`; cd t; ./perl harness
SHRDLU_4b
                }
                warn <<SHRDLU_5;
### for csh-style shells, like tcsh; or for traditional/modern
### Bourne-style shells, like bash, ksh, and zsh, respectively.
SHRDLU_5
            }
        }
    }
    printf "Elapsed: %d sec\n", time() - $t0;
    my ($user,$sys,$cuser,$csys) = times;
    my $tot = sprintf("u=%.2f  s=%.2f  cu=%.2f  cs=%.2f  scripts=%d  tests=%d",
                      $user,$sys,$cuser,$csys,$tested_files,$totmax);
    print "$tot\n";
    if ($good_files) {
        if (-d $show_elapsed_time) {
            # HARNESS_TIMER = <a-directory>.  Save timings etc to
            # storable file there.  NB: the test cds to ./t/, so
            # relative path must account for that, ie ../../perf
            # points to dir next to source tree.
            require Storable;
            my @dt = localtime;
            $dt[5] += 1900; $dt[4] += 1; # fix year, month
            my $fn = "$show_elapsed_time/".join('-', @dt[5,4,3,2,1]).".ttimes";
            Storable::store({ perf => \%timings,
                              gather_conf_platform_info(),
                              total => $tot,
                            }, $fn);
            print "wrote storable file: $fn\n";
        }
    }
    _cleanup_valgrind(\$toolnm, \$grind_ct);
}
exit ($::bad_files != 0);
# Collect platform, config data that should allow comparing
# performance data between different machines.  With enough data,
# and/or clever statistical analysis, it should be possible to
# determine the effect of config choices, more memory, etc
sub gather_conf_platform_info {
    # currently rather quick & dirty, and subject to change
    # for both content and format.
    require Config;
    my (%conf, @platform) = ();
    $conf{$_} = $Config::Config{$_} for
        grep /cc|git|config_arg\d+/, keys %Config::Config;
    if (-f '/proc/cpuinfo') {
        open my $fh, '/proc/cpuinfo' or warn "$!: /proc/cpuinfo\n";
        @platform = grep /name|cpu/, <$fh>;
        chomp $_ for @platform;
    }
    unshift @platform, $OS;
    return (
        conf => \%conf,
        platform => {cpu => \@platform,
                     mem => [ grep s/\s+/ /,
                              grep chomp, `free` ],
                     load => [ grep chomp, `uptime` ],
        },
        host => (grep chomp, `hostname -f`),
        version => '0.03', # bump for conf, platform, or data collection changes
        );
}
sub _check_valgrind {
    return unless $ENV{PERL_VALGRIND};
    my ($toolnm, $grind_ct, $test) = @_;
    $$toolnm = $ENV{VALGRIND};
    $$toolnm =~ s|.*/||;  # keep basename
    my @valgrind;       # gets content of file
    if (-e $Valgrind_Log) {
        if (open(V, $Valgrind_Log)) {
            @valgrind = <V>;
            close V;
        } else {
            warn "$0: Failed to open '$Valgrind_Log': $!\n";
        }
    }
    if ($ENV{VG_OPTS} =~ /(cachegrind)/ or $$toolnm =~ /(perf)/) {
        $$toolnm = $1;
        if ($$toolnm eq 'perf') {
            # append perfs subcommand, not just stat
            my ($sub) = split /\s/, $ENV{VG_OPTS};
            $$toolnm .= "-$sub";
        }
        if (rename $Valgrind_Log, "$$test.$$toolnm") {
            $$grind_ct++;
        } else {
            warn "$0: Failed to create '$$test.$$toolnm': $!\n";
        }
    }
    elsif (@valgrind) {
        my $leaks = 0;
        my $errors = 0;
        for my $i (0..$#valgrind) {
            local $_ = $valgrind[$i];
            if (/^==\d+== ERROR SUMMARY: (\d+) errors? /) {
                $errors = $errors + $1;   # there may be multiple error summaries
            } elsif (/^==\d+== LEAK SUMMARY:/) {
                for my $off (1 .. 4) {
                    if ($valgrind[$i+$off] =~
                        /(?:lost|reachable):\s+\d+ bytes in (\d+) blocks/) {
                            $leaks = $leaks + $1;
                    }
                }
            }
        }
        if ($errors or $leaks) {
            if (rename $Valgrind_Log, "$$test.valgrind") {
                $$grind_ct = $$grind_ct + 1;
            } else {
                warn "$0: Failed to create '$$test.valgrind': $!\n";
            }
        }
    } else {
        # Quiet wasn't asked for? Something may be amiss
        if ($ENV{VG_OPTS} && $ENV{VG_OPTS} !~ /(^|\s)(-q|--quiet)(\s|$)/) {
            warn "No valgrind output?\n";
        }
    }
    if (-e $Valgrind_Log) {
        unlink $Valgrind_Log
            or warn "$0: Failed to unlink '$Valgrind_Log': $!\n";
    }
}
sub _cleanup_valgrind {
    return unless $ENV{PERL_VALGRIND};
    my ($toolnm, $grind_ct) = @_;
    my $s = $$grind_ct == 1 ? '' : 's';
    print "$$grind_ct valgrind report$s created.\n", ;
    if ($$toolnm eq 'cachegrind') {
        # cachegrind leaves a lot of cachegrind.out.$pid litter
        # around the tree, find and delete them
        unlink _find_files('cachegrind.out.\d+$',
                     qw ( ../t ../cpan ../ext ../dist/ ));
    }
    elsif ($$toolnm eq 'valgrind') {
        # Remove empty, hence non-error, output files
        unlink grep { -z } _find_files('valgrind-current',
                     qw ( ../t ../cpan ../ext ../dist/ ));
    }
}
# Generate regexps of known bad filenames / skips from Porting/deparse-skips.txt
sub _process_deparse_config {
    my @deparse_failures;
    my @deparse_skips;
    my $f = $deparse_skip_file;
    my $skips;
    if (!open($skips, '<', $f)) {
        warn "Failed to find $f: $!\n";
        return;
    }
    my $in;
    while(<$skips>) {
        if (/__DEPARSE_FAILURES__/) {
            $in = \@deparse_failures; next;
        } elsif (/__DEPARSE_SKIPS__/) {
            $in = \@deparse_skips; next;
        } elsif (!$in) {
            next;
        }
        s/#.*$//; # Kill comments
        s/\s+$//; # And trailing whitespace
        next unless $_;
        push @$in, $_;
        warn "WARNING: $f:$.: excluded file doesn't exist: $_\n" unless -f $_;
    }
    for my $f (@deparse_failures, @deparse_skips) {
        if ($f =~ m|/$|) { # Dir? Skip everything below it
            $f = qr/\Q$f\E.*/;
        } else {
            $f = qr/\Q$f\E/;
        }
    }
    $deparse_failures = join('|', @deparse_failures);
    $deparse_failures = qr/^(?:$deparse_failures)$/;
    $deparse_skips = join('|', @deparse_skips);
    $deparse_skips = qr/^(?:$deparse_skips)$/;
}
# ex: set ts=8 sts=4 sw=4 noet: