625 lines
17 KiB
Perl
Executable file
625 lines
17 KiB
Perl
Executable file
use strict;
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use warnings;
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use tests::Algorithm::Diff;
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use File::Temp 'tempfile';
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use Fcntl qw(SEEK_SET SEEK_CUR);
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sub fail;
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sub pass;
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die if @ARGV != 2;
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our ($test, $src_dir) = @ARGV;
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my ($msg_file) = tempfile ();
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select ($msg_file);
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our (@prereq_tests) = ();
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if ($test =~ /^(.*)-persistence$/) {
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push (@prereq_tests, $1);
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}
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for my $prereq_test (@prereq_tests) {
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my (@result) = read_text_file ("$prereq_test.result");
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fail "Prerequisite test $prereq_test failed.\n" if $result[0] ne 'PASS';
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}
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# Generic testing.
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sub check_expected {
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my ($expected) = pop @_;
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my (@options) = @_;
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my (@output) = read_text_file ("$test.output");
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common_checks ("run", @output);
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compare_output ("run", @options, \@output, $expected);
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}
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sub common_checks {
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my ($run, @output) = @_;
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fail "\u$run produced no output at all\n" if @output == 0;
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check_for_panic ($run, @output);
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check_for_keyword ($run, "FAIL", @output);
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check_for_triple_fault ($run, @output);
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check_for_keyword ($run, "TIMEOUT", @output);
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fail "\u$run didn't start up properly: no \"Pintos booting\" message\n"
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if !grep (/Pintos booting with.*kB RAM\.\.\./, @output);
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fail "\u$run didn't start up properly: no \"Boot complete\" message\n"
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if !grep (/Boot complete/, @output);
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fail "\u$run didn't shut down properly: no \"Timer: # ticks\" message\n"
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if !grep (/Timer: \d+ ticks/, @output);
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fail "\u$run didn't shut down properly: no \"Powering off\" message\n"
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if !grep (/Powering off/, @output);
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}
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sub check_for_panic {
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my ($run, @output) = @_;
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my ($panic) = grep (/PANIC/, @output);
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return unless defined $panic;
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print "Kernel panic in $run: ", substr ($panic, index ($panic, "PANIC")),
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"\n";
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my (@stack_line) = grep (/Call stack:/, @output);
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if (@stack_line != 0) {
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my ($addrs) = $stack_line[0] =~ /Call stack:((?: 0x[0-9a-f]+)+)/;
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# Find a user program to translate user virtual addresses.
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my ($userprog) = "";
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$userprog = "$test"
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if grep (hex ($_) < 0xc0000000, split (' ', $addrs)) > 0 && -e $test;
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# Get and print the backtrace.
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my ($trace) = scalar (`backtrace kernel.o $userprog $addrs`);
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print "Call stack:$addrs\n";
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print "Translation of call stack:\n";
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print $trace;
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# Print disclaimer.
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if ($userprog ne '' && index ($trace, $userprog) >= 0) {
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print <<EOF;
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Translations of user virtual addresses above are based on a guess at
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the binary to use. If this guess is incorrect, then those
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translations will be misleading.
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EOF
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}
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}
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if ($panic =~ /sec_no \< d-\>capacity/) {
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print <<EOF;
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\nThis assertion commonly fails when accessing a file via an inode that
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has been closed and freed. Freeing an inode clears all its sector
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indexes to 0xcccccccc, which is not a valid sector number for disks
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smaller than about 1.6 TB.
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EOF
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}
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fail;
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}
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sub check_for_keyword {
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my ($run, $keyword, @output) = @_;
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my ($kw_line) = grep (/$keyword/, @output);
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return unless defined $kw_line;
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# Most output lines are prefixed by (test-name). Eliminate this
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# from our message for brevity.
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$kw_line =~ s/^\([^\)]+\)\s+//;
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print "$run: $kw_line\n";
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fail;
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}
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sub check_for_triple_fault {
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my ($run, @output) = @_;
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my ($reboots) = grep (/Pintos booting/, @output) - 1;
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return unless $reboots > 0;
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print <<EOF;
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\u$run spontaneously rebooted $reboots times.
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This is most often caused by unhandled page faults.
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Read the Triple Faults section in the Debugging chapter
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of the Pintos manual for more information.
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EOF
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fail;
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}
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# Get @output without header or trailer.
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sub get_core_output {
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my ($run, @output) = @_;
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my ($p);
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my ($process);
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my ($start);
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for my $i (0...$#_) {
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$start = $i + 1, last
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if ($process) = $output[$i] =~ /^Executing '(\S+).*':$/;
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}
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my ($end);
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for my $i ($start...$#output) {
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$end = $i - 1, last if $output[$i] =~ /^Execution of '.*' complete.$/;
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}
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fail "\u$run didn't start a thread or process\n" if !defined $start;
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fail "\u$run started '$process' but it never finished\n" if !defined $end;
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return @output[$start...$end];
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}
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sub compare_output {
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my ($run) = shift @_;
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my ($expected) = pop @_;
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my ($output) = pop @_;
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my (%options) = @_;
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my (@output) = get_core_output ($run, @$output);
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fail "\u$run didn't produce any output" if !@output;
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my $ignore_exit_codes = exists $options{IGNORE_EXIT_CODES};
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if ($ignore_exit_codes) {
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delete $options{IGNORE_EXIT_CODES};
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@output = grep (!/^[a-zA-Z0-9-_]+: exit\(\-?\d+\)$/, @output);
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}
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my $ignore_user_faults = exists $options{IGNORE_USER_FAULTS};
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if ($ignore_user_faults) {
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delete $options{IGNORE_USER_FAULTS};
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@output = grep (!/^Page fault at.*in user context\.$/
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&& !/: dying due to interrupt 0x0e \(.*\).$/
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&& !/^Interrupt 0x0e \(.*\) at eip=/
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&& !/^ cr2=.* error=.*/
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&& !/^ eax=.* ebx=.* ecx=.* edx=.*/
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&& !/^ esi=.* edi=.* esp=.* ebp=.*/
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&& !/^ cs=.* ds=.* es=.* ss=.*/, @output);
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}
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die "unknown option " . (keys (%options))[0] . "\n" if %options;
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my ($msg);
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# Compare actual output against each allowed output.
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if (ref ($expected) eq 'ARRAY') {
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my ($i) = 0;
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$expected = {map ((++$i => $_), @$expected)};
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}
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foreach my $key (keys %$expected) {
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my (@expected) = split ("\n", $expected->{$key});
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$msg .= "Acceptable output:\n";
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$msg .= join ('', map (" $_\n", @expected));
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# Check whether actual and expected match.
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# If it's a perfect match, we're done.
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if ($#output == $#expected) {
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my ($eq) = 1;
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for (my ($i) = 0; $i <= $#expected; $i++) {
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$eq = 0 if $output[$i] ne $expected[$i];
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}
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return $key if $eq;
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}
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# They differ. Output a diff.
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my (@diff) = "";
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my ($d) = Algorithm::Diff->new (\@expected, \@output);
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while ($d->Next ()) {
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my ($ef, $el, $af, $al) = $d->Get (qw (min1 max1 min2 max2));
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if ($d->Same ()) {
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push (@diff, map (" $_\n", $d->Items (1)));
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} else {
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push (@diff, map ("- $_\n", $d->Items (1))) if $d->Items (1);
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push (@diff, map ("+ $_\n", $d->Items (2))) if $d->Items (2);
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}
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}
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$msg .= "Differences in `diff -u' format:\n";
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$msg .= join ('', @diff);
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}
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# Failed to match. Report failure.
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$msg .= "\n(Process exit codes are excluded for matching purposes.)\n"
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if $ignore_exit_codes;
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$msg .= "\n(User fault messages are excluded for matching purposes.)\n"
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if $ignore_user_faults;
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fail "Test output failed to match any acceptable form.\n\n$msg";
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}
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# File system extraction.
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# check_archive (\%CONTENTS)
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#
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# Checks that the extracted file system's contents match \%CONTENTS.
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# Each key in the hash is a file name. Each value may be:
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#
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# - $FILE: Name of a host file containing the expected contents.
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#
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# - [$FILE, $OFFSET, $LENGTH]: An excerpt of host file $FILE
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# comprising the $LENGTH bytes starting at $OFFSET.
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#
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# - [$CONTENTS]: The literal expected file contents, as a string.
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#
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# - {SUBDIR}: A subdirectory, in the same form described here,
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# recursively.
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sub check_archive {
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my ($expected_hier) = @_;
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my (@output) = read_text_file ("$test.output");
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common_checks ("file system extraction run", @output);
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@output = get_core_output ("file system extraction run", @output);
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@output = grep (!/^[a-zA-Z0-9-_]+: exit\(\d+\)$/, @output);
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fail join ("\n", "Error extracting file system:", @output) if @output;
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my ($test_base_name) = $test;
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$test_base_name =~ s%.*/%%;
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$test_base_name =~ s%-persistence$%%;
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$expected_hier->{$test_base_name} = $prereq_tests[0];
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$expected_hier->{'tar'} = 'tests/filesys/extended/tar';
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my (%expected) = normalize_fs (flatten_hierarchy ($expected_hier, ""));
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my (%actual) = read_tar ("$prereq_tests[0].tar");
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my ($errors) = 0;
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foreach my $name (sort keys %expected) {
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if (exists $actual{$name}) {
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if (is_dir ($actual{$name}) && !is_dir ($expected{$name})) {
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print "$name is a directory but should be an ordinary file.\n";
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$errors++;
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} elsif (!is_dir ($actual{$name}) && is_dir ($expected{$name})) {
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print "$name is an ordinary file but should be a directory.\n";
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$errors++;
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}
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} else {
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print "$name is missing from the file system.\n";
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$errors++;
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}
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}
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foreach my $name (sort keys %actual) {
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if (!exists $expected{$name}) {
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if ($name =~ /^[[:print:]]+$/) {
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print "$name exists in the file system but it should not.\n";
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} else {
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my ($esc_name) = $name;
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$esc_name =~ s/[^[:print:]]/./g;
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print <<EOF;
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$esc_name exists in the file system but should not. (The name
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of this file contains unusual characters that were printed as `.'.)
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EOF
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}
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$errors++;
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}
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}
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if ($errors) {
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print "\nActual contents of file system:\n";
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print_fs (%actual);
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print "\nExpected contents of file system:\n";
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print_fs (%expected);
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} else {
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foreach my $name (sort keys %expected) {
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if (!is_dir ($expected{$name})) {
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my ($exp_file, $exp_length) = open_file ($expected{$name});
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my ($act_file, $act_length) = open_file ($actual{$name});
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$errors += !compare_files ($exp_file, $exp_length,
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$act_file, $act_length, $name,
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!$errors);
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close ($exp_file);
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close ($act_file);
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}
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}
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}
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fail "Extracted file system contents are not correct.\n" if $errors;
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}
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# open_file ([$FILE, $OFFSET, $LENGTH])
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# open_file ([$CONTENTS])
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#
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# Opens a file for the contents passed in, which must be in one of
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# the two above forms that correspond to check_archive() arguments.
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#
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# Returns ($HANDLE, $LENGTH), where $HANDLE is the file's handle and
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# $LENGTH is the number of bytes in the file's content.
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sub open_file {
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my ($value) = @_;
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die if ref ($value) ne 'ARRAY';
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my ($file) = tempfile ();
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my ($length);
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if (@$value == 1) {
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$length = length ($value->[0]);
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$file = tempfile ();
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syswrite ($file, $value->[0]) == $length
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or die "writing temporary file: $!\n";
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sysseek ($file, 0, SEEK_SET);
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} elsif (@$value == 3) {
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$length = $value->[2];
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open ($file, '<', $value->[0]) or die "$value->[0]: open: $!\n";
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die "$value->[0]: file is smaller than expected\n"
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if -s $file < $value->[1] + $length;
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sysseek ($file, $value->[1], SEEK_SET);
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} else {
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die;
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}
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return ($file, $length);
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}
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# compare_files ($A, $A_SIZE, $B, $B_SIZE, $NAME, $VERBOSE)
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#
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# Compares $A_SIZE bytes in $A to $B_SIZE bytes in $B.
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# ($A and $B are handles.)
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# If their contents differ, prints a brief message describing
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# the differences, using $NAME to identify the file.
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# The message contains more detail if $VERBOSE is nonzero.
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# Returns 1 if the contents are identical, 0 otherwise.
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sub compare_files {
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my ($a, $a_size, $b, $b_size, $name, $verbose) = @_;
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my ($ofs) = 0;
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select(STDOUT);
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for (;;) {
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my ($a_amt) = $a_size >= 1024 ? 1024 : $a_size;
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my ($b_amt) = $b_size >= 1024 ? 1024 : $b_size;
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my ($a_data, $b_data);
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if (!defined (sysread ($a, $a_data, $a_amt))
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|| !defined (sysread ($b, $b_data, $b_amt))) {
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die "reading $name: $!\n";
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}
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my ($a_len) = length $a_data;
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my ($b_len) = length $b_data;
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last if $a_len == 0 && $b_len == 0;
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if ($a_data ne $b_data) {
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my ($min_len) = $a_len < $b_len ? $a_len : $b_len;
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my ($diff_ofs);
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for ($diff_ofs = 0; $diff_ofs < $min_len; $diff_ofs++) {
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last if (substr ($a_data, $diff_ofs, 1)
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ne substr ($b_data, $diff_ofs, 1));
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}
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printf "\nFile $name differs from expected "
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. "starting at offset 0x%x.\n", $ofs + $diff_ofs;
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if ($verbose ) {
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print "Expected contents:\n";
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hex_dump (substr ($a_data, $diff_ofs, 64), $ofs + $diff_ofs);
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print "Actual contents:\n";
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hex_dump (substr ($b_data, $diff_ofs, 64), $ofs + $diff_ofs);
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}
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return 0;
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}
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$ofs += $a_len;
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$a_size -= $a_len;
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$b_size -= $b_len;
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}
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return 1;
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}
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# hex_dump ($DATA, $OFS)
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#
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# Prints $DATA in hex and text formats.
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# The first byte of $DATA corresponds to logical offset $OFS
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# in whatever file the data comes from.
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sub hex_dump {
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my ($data, $ofs) = @_;
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if ($data eq '') {
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printf " (File ends at offset %08x.)\n", $ofs;
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return;
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}
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my ($per_line) = 16;
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while ((my $size = length ($data)) > 0) {
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my ($start) = $ofs % $per_line;
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my ($end) = $per_line;
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$end = $start + $size if $end - $start > $size;
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my ($n) = $end - $start;
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printf "0x%08x ", int ($ofs / $per_line) * $per_line;
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# Hex version.
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print " " x $start;
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for my $i ($start...$end - 1) {
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printf "%02x", ord (substr ($data, $i - $start, 1));
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print $i == $per_line / 2 - 1 ? '-' : ' ';
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}
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print " " x ($per_line - $end);
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# Character version.
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my ($esc_data) = substr ($data, 0, $n);
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$esc_data =~ s/[^[:print:]]/./g;
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print "|", " " x $start, $esc_data, " " x ($per_line - $end), "|";
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print "\n";
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$data = substr ($data, $n);
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$ofs += $n;
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}
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}
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# print_fs (%FS)
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#
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# Prints a list of files in %FS, which must be a file system
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# as flattened by flatten_hierarchy() and normalized by
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# normalize_fs().
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sub print_fs {
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my (%fs) = @_;
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foreach my $name (sort keys %fs) {
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my ($esc_name) = $name;
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$esc_name =~ s/[^[:print:]]/./g;
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print "$esc_name: ";
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if (!is_dir ($fs{$name})) {
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print +file_size ($fs{$name}), "-byte file";
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} else {
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print "directory";
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}
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print "\n";
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}
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print "(empty)\n" if !@_;
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}
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# normalize_fs (%FS)
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#
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# Takes a file system as flattened by flatten_hierarchy().
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# Returns a similar file system in which values of the form $FILE
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# are replaced by those of the form [$FILE, $OFFSET, $LENGTH].
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sub normalize_fs {
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my (%fs) = @_;
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foreach my $name (keys %fs) {
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my ($value) = $fs{$name};
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next if is_dir ($value) || ref ($value) ne '';
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die "can't open $value\n" if !stat $value;
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$fs{$name} = [$value, 0, -s _];
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}
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return %fs;
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}
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# is_dir ($VALUE)
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#
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# Takes a value like one in the hash returned by flatten_hierarchy()
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# and returns 1 if it represents a directory, 0 otherwise.
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sub is_dir {
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my ($value) = @_;
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return ref ($value) eq '' && $value eq 'directory';
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}
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# file_size ($VALUE)
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#
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# Takes a value like one in the hash returned by flatten_hierarchy()
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# and returns the size of the file it represents.
|
||
sub file_size {
|
||
my ($value) = @_;
|
||
die if is_dir ($value);
|
||
die if ref ($value) ne 'ARRAY';
|
||
return @$value > 1 ? $value->[2] : length ($value->[0]);
|
||
}
|
||
|
||
# flatten_hierarchy ($HIER_FS, $PREFIX)
|
||
#
|
||
# Takes a file system in the format expected by check_archive() and
|
||
# returns a "flattened" version in which file names include all parent
|
||
# directory names and the value of directories is just "directory".
|
||
sub flatten_hierarchy {
|
||
my (%hier_fs) = %{$_[0]};
|
||
my ($prefix) = $_[1];
|
||
my (%flat_fs);
|
||
for my $name (keys %hier_fs) {
|
||
my ($value) = $hier_fs{$name};
|
||
if (ref $value eq 'HASH') {
|
||
%flat_fs = (%flat_fs, flatten_hierarchy ($value, "$prefix$name/"));
|
||
$flat_fs{"$prefix$name"} = 'directory';
|
||
} else {
|
||
$flat_fs{"$prefix$name"} = $value;
|
||
}
|
||
}
|
||
return %flat_fs;
|
||
}
|
||
|
||
# read_tar ($ARCHIVE)
|
||
#
|
||
# Reads the ustar-format tar file in $ARCHIVE
|
||
# and returns a flattened file system for it.
|
||
sub read_tar {
|
||
my ($archive) = @_;
|
||
my (%content);
|
||
open (ARCHIVE, '<', $archive) or fail "$archive: open: $!\n";
|
||
for (;;) {
|
||
my ($header);
|
||
if ((my $retval = sysread (ARCHIVE, $header, 512)) != 512) {
|
||
fail "$archive: unexpected end of file\n" if $retval >= 0;
|
||
fail "$archive: read: $!\n";
|
||
}
|
||
|
||
last if $header eq "\0" x 512;
|
||
|
||
# Verify magic numbers.
|
||
if (substr ($header, 257, 6) ne "ustar\0"
|
||
|| substr ($header, 263, 2) ne '00') {
|
||
fail "$archive: corrupt ustar header\n";
|
||
}
|
||
|
||
# Verify checksum.
|
||
my ($chksum) = oct (unpack ("Z*", substr ($header, 148, 8, ' ' x 8)));
|
||
my ($correct_chksum) = unpack ("%32a*", $header);
|
||
fail "$archive: bad header checksum\n" if $chksum != $correct_chksum;
|
||
|
||
# Get file name.
|
||
my ($name) = unpack ("Z100", $header);
|
||
my ($prefix) = unpack ("Z*", substr ($header, 345));
|
||
$name = "$prefix/$name" if $prefix ne '';
|
||
fail "$archive: contains file with empty name" if $name eq '';
|
||
|
||
# Get type.
|
||
my ($typeflag) = substr ($header, 156, 1);
|
||
$typeflag = '0' if $typeflag eq "\0";
|
||
fail "unknown file type '$typeflag'\n" if $typeflag !~ /[05]/;
|
||
|
||
# Get size.
|
||
my ($size) = oct (unpack ("Z*", substr ($header, 124, 12)));
|
||
fail "bad size $size\n" if $size < 0;
|
||
$size = 0 if $typeflag eq '5';
|
||
|
||
# Store content.
|
||
$name =~ s%^(/|\./|\.\./)*%%; # Strip leading "/", "./", "../".
|
||
$name = '' if $name eq '.' || $name eq '..';
|
||
if (exists $content{$name}) {
|
||
fail "$archive: contains multiple entries for $name\n";
|
||
}
|
||
if ($typeflag eq '5') {
|
||
$content{$name} = 'directory' if $name ne '';
|
||
} else {
|
||
fail "$archive: contains file with empty name\n" if $name eq '';
|
||
my ($position) = sysseek (ARCHIVE, 0, SEEK_CUR);
|
||
$content{$name} = [$archive, $position, $size];
|
||
sysseek (ARCHIVE, int (($size + 511) / 512) * 512, SEEK_CUR);
|
||
}
|
||
}
|
||
close (ARCHIVE);
|
||
return %content;
|
||
}
|
||
|
||
# Utilities.
|
||
|
||
sub fail {
|
||
finish ("FAIL", @_);
|
||
}
|
||
|
||
sub pass {
|
||
finish ("PASS", @_);
|
||
}
|
||
|
||
sub finish {
|
||
my ($verdict, @messages) = @_;
|
||
|
||
seek ($msg_file, 0, 0);
|
||
push (@messages, <$msg_file>);
|
||
close ($msg_file);
|
||
chomp (@messages);
|
||
|
||
my ($result_fn) = "$test.result";
|
||
open (RESULT, '>', $result_fn) or die "$result_fn: create: $!\n";
|
||
print RESULT "$verdict\n";
|
||
print RESULT "$_\n" foreach @messages;
|
||
close (RESULT);
|
||
|
||
if ($verdict eq 'PASS') {
|
||
print STDOUT "pass $test\n";
|
||
} else {
|
||
print STDOUT "FAIL $test\n";
|
||
}
|
||
print STDOUT "$_\n" foreach @messages;
|
||
|
||
exit 0;
|
||
}
|
||
|
||
sub read_text_file {
|
||
my ($file_name) = @_;
|
||
open (FILE, '<', $file_name) or die "$file_name: open: $!\n";
|
||
my (@content) = <FILE>;
|
||
chomp (@content);
|
||
close (FILE);
|
||
return @content;
|
||
}
|
||
|
||
1;
|