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305 lines
7.3 KiB
Perl
Executable File
305 lines
7.3 KiB
Perl
Executable File
#!/usr/bin/perl
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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use warnings;
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use strict;
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use IO::Socket;
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use Net::hostent;
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use IPC::Shareable;
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use Time::HiRes qw/gettimeofday/;
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my $SERVER_PORT = 9000;
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my $MONITOR_PORT = 3335;
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my $SERIAL_PORT = 3333;
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my $HEARTBEAT_PORT = 3336;
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my $COMPILE_TIMEOUT = 10;
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my $NOGRAPHIC = 1;
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sub server_listen {
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my $port = shift @_;
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my $server = IO::Socket::INET->new(
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Proto => 'tcp',
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LocalPort => $port,
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Listen => SOMAXCONN,
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Reuse => 1);
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die "can't setup server: $!" unless $server;
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print "[Server $0 accepting clients]\n";
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return $server;
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}
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sub vm_stop {
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my $pid = shift @_;
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return if not defined $pid;
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print "killing vm $pid\n";
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kill 'INT', $pid;
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waitpid($pid, 0);
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}
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sub vm_start {
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my $pid = fork;
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if(not defined $pid) {
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die "fork failed: $!";
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}
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if($pid == 0) {
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my $command = "qemu-system-x86_64 -M pc -net none -hda compiler-snap.qcow2 -m 512 -monitor tcp:127.0.0.1:$MONITOR_PORT,server,nowait -serial tcp:127.0.0.1:$SERIAL_PORT,server,nowait -serial tcp:127.0.0.1:$HEARTBEAT_PORT,server -boot c -enable-kvm -loadvm 1" . ($NOGRAPHIC ? " -nographic" : "");
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my @command_list = split / /, $command;
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exec(@command_list);
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} else {
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return $pid;
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}
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}
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sub vm_reset {
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use IO::Socket;
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print "Resetting vm\n";
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my $sock = IO::Socket::INET->new(PeerAddr => '127.0.0.1', PeerPort => $MONITOR_PORT, Prot => 'tcp');
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if(not defined $sock) {
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print "[vm_reset] Unable to connect to monitor: $!\n";
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return;
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}
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print $sock "loadvm 1\n";
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close $sock;
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print "Reset vm\n";
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}
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sub execute {
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my ($cmdline) = @_;
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print "execute($cmdline)\n";
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my ($ret, $result);
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my $child = fork;
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if($child == 0) {
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($ret, $result) = eval {
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my $result = '';
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my $pid = open(my $fh, '-|', "$cmdline 2>&1");
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local $SIG{ALRM} = sub { print "Time out\n"; kill 9, $pid; print "sent KILL to $pid\n"; die "Timed-out: $result\n"; };
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alarm($COMPILE_TIMEOUT);
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while(my $line = <$fh>) {
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$result .= $line;
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}
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close $fh;
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my $ret = $? >> 8;
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alarm 0;
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#print "[$ret, $result]\n";
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return ($ret, $result);
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};
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alarm 0;
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if($@ =~ /Timed-out: (.*)/) {
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return (-13, "[Timed-out] $1");
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}
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return ($ret, $result);
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} else {
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waitpid($child, 0);
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my $result = $? >> 8;
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print "child exited, parent continuing [result = $result]\n";
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return (undef, $result);
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}
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}
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sub compiler_server {
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my ($server, $heartbeat_pid, $heartbeat_monitor);
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my $heartbeat;
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my $running;
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tie $heartbeat, 'IPC::Shareable', 'dat1', { create => 1 };
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tie $running, 'IPC::Shareable', 'dat2', { create => 1 };
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my $last_wait = 0;
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while(1) {
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$running = 1;
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$heartbeat = 0;
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my $vm_pid = vm_start;
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print "vm started pid: $vm_pid\n";
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$heartbeat_pid = fork;
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die "Fork failed: $!" if not defined $heartbeat_pid;
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if($heartbeat_pid == 0) {
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tie $heartbeat, 'IPC::Shareable', 'dat1', { create => 1 };
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tie $running, 'IPC::Shareable', 'dat2', { create => 1 };
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$heartbeat_monitor = undef;
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my $attempts = 0;
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while((not $heartbeat_monitor) and $attempts < 5) {
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print "Connecting to heartbeat ...";
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$heartbeat_monitor = IO::Socket::INET->new(PeerAddr => '127.0.0.1', PeerPort => $HEARTBEAT_PORT, Proto => 'tcp', Type => SOCK_STREAM);
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if(not $heartbeat_monitor) {
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print " failed.\n";
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++$attempts;
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sleep 2;
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} else {
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print " success!\n";
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}
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}
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if ($attempts >= 5) {
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print "heart not beating... restarting\n";
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$heartbeat = -1;
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sleep 5;
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next;
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}
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print "child: running: $running\n";
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while($running and <$heartbeat_monitor>) {
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$heartbeat = 1;
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#print "child: got heartbeat\n";
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}
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print "child no longer running\n";
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exit;
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} else {
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while ($heartbeat <= 0) {
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if ($heartbeat == -1) {
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print "heartbeat died\n";
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last;
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}
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print "sleeping for heartbeat...\n";
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sleep 1;
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}
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if ($heartbeat == -1) {
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print "fucking dead, restarting\n";
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waitpid $heartbeat_pid, 0;
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vm_stop $vm_pid;
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next;
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}
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print "K, got heartbeat, here we go...\n";
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if(not defined $server) {
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print "Starting compiler server on port $SERVER_PORT\n";
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$server = server_listen($SERVER_PORT);
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} else {
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print "Compiler server already listening on port $SERVER_PORT\n";
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}
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print "parent: running: $running\n";
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while ($running and my $client = $server->accept()) {
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$client->autoflush(1);
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my $hostinfo = gethostbyaddr($client->peeraddr);
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print '-' x 20, "\n";
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printf "[Connect from %s at %s]\n", $client->peerhost, scalar localtime;
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my $timed_out = 0;
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my $killed = 0;
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eval {
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my $lang;
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my $nick;
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my $channel;
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my $code = "";
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local $SIG{ALRM} = sub { die 'Timed-out'; };
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alarm 5;
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while (my $line = <$client>) {
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$line =~ s/[\r\n]+$//;
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next if $line =~ m/^\s*$/;
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alarm 5;
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print "got: [$line]\n";
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if($line =~ m/^compile:end$/) {
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if($heartbeat <= 0) {
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print "No heartbeat yet, ignoring compile attempt.\n";
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print $client "$nick: Recovering from previous snippet, please wait.\n" if gettimeofday - $last_wait > 60;
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$last_wait = gettimeofday;
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last;
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}
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print "Attempting compile...\n";
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alarm 0;
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my ($ret, $result) = execute("./compiler_vm_client.pl \Q$lang\E \Q$nick\E \Q$channel\E \Q$code\E");
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if(not defined $ret) {
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#print "parent continued\n";
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print "parent continued [$result]\n";
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$timed_out = 1 if $result == 243; # -13 == 243
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$killed = 1 if $result == 242; # -14 = 242
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last;
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}
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$result =~ s/\s+$//;
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print "Ret: $ret; result: [$result]\n";
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if($result =~ m/\[Killed\]$/) {
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print "Process was killed\n";
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$killed = 1;
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}
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if($ret == -13) {
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print $client "$nick: ";
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}
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print $client $result . "\n";
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close $client;
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$ret = -14 if $killed;
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# child exit
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print "child exit\n";
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exit $ret;
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}
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if($line =~ /compile:([^:]+):([^:]+):(.*)$/) {
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$nick = $1;
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$channel = $2;
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$lang = $3;
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$code = "";
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next;
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}
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$code .= $line . "\n";
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}
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alarm 0;
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};
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alarm 0;
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close $client;
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#next unless ($timed_out or $killed);
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#next unless $timed_out;
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print "stopping vm $vm_pid\n";
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vm_stop $vm_pid;
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$running = 0;
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last;
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}
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print "Compiler server no longer running, restarting...\n";
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}
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waitpid($heartbeat_pid, 0);
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}
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}
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compiler_server;
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