feat(judger): uoj_judger_v2 (#2)

judger/Dockerfile

@@ -1,9 +1,9 @@
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 ARG CLONE_ADDFLAG
 
 ENV DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get install -y vim ntp zip unzip curl wget build-essential fp-compiler python2.7 python3.8 python3-requests
+RUN apt-get update && apt-get install -y vim ntp zip unzip curl wget build-essential fp-compiler python2.7 python3.10 python3-requests libseccomp-dev openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk
 
 ADD . /opt/uoj_judger
 WORKDIR /opt/uoj_judger

judger/install.sh

@@ -3,7 +3,8 @@
 getAptPackage(){
     printf "\n\n==> Getting environment packages\n"
     export DEBIAN_FRONTEND=noninteractive
-    apt-get update && apt-get install -y vim ntp zip unzip curl wget build-essential fp-compiler python2.7 python3.8 python3-requests
+    apt-get update
+	apt-get install -y vim ntp zip unzip curl wget build-essential fp-compiler python2.7 python3.10 python3-requests libseccomp-dev openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk
 }
 
 setJudgeConf(){
@@ -21,12 +22,6 @@ UOJEOF
     su judger <<EOD
 ln -s /var/uoj_data_copy /opt/uoj_judger/uoj_judger/data
 cd /opt/uoj_judger && chmod +x judge_client
-cat >uoj_judger/include/uoj_work_path.h <<UOJEOF
-#define UOJ_WORK_PATH "/opt/uoj_judger/uoj_judger"
-#define UOJ_JUDGER_BASESYSTEM_UBUNTU1804
-#define UOJ_JUDGER_PYTHON3_VERSION "3.8"
-#define UOJ_JUDGER_FPC_VERSION "3.0.4"
-UOJEOF
 cd uoj_judger && make -j$(($(nproc) + 1))
 EOD
 }

judger/judge_client

@@ -5,433 +5,600 @@ import sys
 import os
 import pipes
 import socket
-from threading import Thread
+from threading import Thread, Lock, Condition, RLock
 import fcntl
 import shutil
-
-import traceback
 import time
+import logging
+import codecs
 from contextlib import closing
+from typing import *
 
 import requests
 
-import queue as queue
 from queue import Queue, Empty
 
-taskQ = Queue()
+jconf: dict
-submission = None
 
-# path related function
-
-def uoj_url(uri):
-	return ("%s://%s%s" % (jconf['uoj_protocol'], jconf['uoj_host'], uri)).rstrip('/')
-def uoj_judger_path(path = ''):
-	return "uoj_judger" + path
 
 # os related funciton
 def clean_up_folder(path):
-	for f in os.listdir(path):
+    for f in os.listdir(path):
-		f_path = os.path.join(path, f)
+        f_path = os.path.join(path, f)
-		if os.path.isfile(f_path):
+        if os.path.isfile(f_path):
-			os.unlink(f_path)
+            os.unlink(f_path)
-		else:
+        else:
-			shutil.rmtree(f_path)
+            shutil.rmtree(f_path)
+
 
 def execute(cmd):
-	if os.system(cmd):
+    if os.system(cmd) != 0:
-		raise Exception('failed to execute: %s' % cmd)
+        raise Exception('failed to execute: %s' % cmd)
+
 
 def freopen(f, g):
-	os.dup2(g.fileno(), f.fileno())
+    os.dup2(g.fileno(), f.fileno())
-	g.close()
+    g.close()
+
+
+# utf 8
+def uoj_text_replace(e):
+    return ''.join('<b>\\x%02x</b>' % b for b in e.object[e.start:e.end]), e.end
+
+
+codecs.register_error('uoj_text_replace', uoj_text_replace)
+
 
 # init
 def init():
-	global jconf
+    global jconf
-	os.chdir(os.path.dirname(os.path.realpath(__file__)))
+    os.chdir(os.path.dirname(os.path.realpath(__file__)))
-	with open('.conf.json', 'r') as fp:
+    with open('.conf.json', 'r') as fp:
-		jconf = json.load(fp)
+        jconf = json.load(fp)
-		assert 'uoj_protocol' in jconf
+        assert 'uoj_protocol' in jconf
-		assert 'uoj_host' in jconf
+        assert 'uoj_host' in jconf
-		assert 'judger_name' in jconf
+        assert 'judger_name' in jconf
-		assert 'judger_password' in jconf
+        assert 'judger_password' in jconf
-		assert 'socket_port' in jconf
+        assert 'socket_port' in jconf
-		assert 'socket_password' in jconf
+        assert 'socket_password' in jconf
+        if 'judger_cpus' not in jconf:
+            jconf['judger_cpus'] = [
+                '0']  # it should be distinct physical cores! Usually, you can just set it to some even numbers
 
-# socket server
-def socket_server_loop():
-	SOCK_CLOEXEC = 524288
-	with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM | SOCK_CLOEXEC)) as s:
-		s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-		s.bind(('', jconf['socket_port']))
-		s.listen(5)
 
-		while True:
+# path related function
-			try:
+def uoj_url(uri):
-				conn, addr = s.accept()
+    return ("%s://%s%s" % (jconf['uoj_protocol'], jconf['uoj_host'], uri)).rstrip('/')
-				with closing(conn) as conn:
-					data = conn.recv(1024).decode()
-					assert data != None
-					task = json.loads(data)
-					assert task['password'] == jconf['socket_password']
-					assert 'cmd' in task
 
-					taskQ.put(task)
 
-					if task['cmd'] == 'stop':
+def uoj_judger_path(path=''):
-						print('the judge client is closing...')
+    return os.getcwd() + "/uoj_judger" + path
-						taskQ.join()
-						conn.sendall(b'ok')
-						return 'stop'
-			except Exception:
-				print('['+time.asctime()+']', 'connection rejected', file=sys.stderr)
-				traceback.print_exc()
-			else:
-				print('['+time.asctime()+']', 'a new task accomplished', file=sys.stderr)
 
-def start_judger_server():
-	global socket_server_thread
 
-	print_judge_client_status()
+class RWLock:
-	print('hello!', file=sys.stderr)
+    def __init__(self):
+        self.rwlock = 0
+        self.writers_waiting = 0
+        self.monitor = Lock()
+        self.readers_ok = Condition(self.monitor)
+        self.writers_ok = Condition(self.monitor)
 
-	socket_server_thread = Thread(target = socket_server_loop)
+    def acquire_read(self):
-	socket_server_thread.setDaemon(True)
+        self.monitor.acquire()
-	socket_server_thread.start()
+        while self.rwlock < 0 or self.writers_waiting:
+            self.readers_ok.wait()
+        self.rwlock += 1
+        self.monitor.release()
 
-	judger_loop()
+    def acquire_write(self):
+        self.monitor.acquire()
+        while self.rwlock != 0:
+            self.writers_waiting += 1
+            self.writers_ok.wait()
+            self.writers_waiting -= 1
+        self.rwlock = -1
+        self.monitor.release()
 
-# report thread
+    def promote(self):
-def report_loop():
+        self.monitor.acquire()
-	if 'is_hack' in submission:
+        self.rwlock -= 1
-		return
+        while self.rwlock != 0:
-	while not submission_judged:
+            self.writers_waiting += 1
-		try:
+            self.writers_ok.wait()
-			with open(uoj_judger_path('/result/cur_status.txt'), 'r') as f:
+            self.writers_waiting -= 1
-				fcntl.flock(f, fcntl.LOCK_SH)
+        self.rwlock = -1
-				try:
+        self.monitor.release()
-					status = f.read(100)
-				except Exception:
-					status = None
-				finally:
-					fcntl.flock(f, fcntl.LOCK_UN)
 
-			if status != None:
+    def demote(self):
-				data = {}
+        self.monitor.acquire()
-				data['update-status'] = True
+        self.rwlock = 1
-				data['id'] = submission['id']
+        self.readers_ok.notifyAll()
-				if 'is_custom_test' in submission:
+        self.monitor.release()
-					data['is_custom_test'] = True
-				data['status'] = status
-				uoj_interact(data)
-			time.sleep(0.2)
-		except Exception:
-			pass
 
-# handle task in main thread
+    def release(self):
-def handle_task():
+        self.monitor.acquire()
-	need_restart = False
+        if self.rwlock < 0:
-	try:
+            self.rwlock = 0
-		while True:
+        else:
-			task = taskQ.get_nowait()
+            self.rwlock -= 1
+        wake_writers = self.writers_waiting and self.rwlock == 0
+        wake_readers = self.writers_waiting == 0
+        self.monitor.release()
+        if wake_writers:
+            self.writers_ok.acquire()
+            self.writers_ok.notify()
+            self.writers_ok.release()
+        elif wake_readers:
+            self.readers_ok.acquire()
+            self.readers_ok.notify_all()
+            self.readers_ok.release()
 
-			if task['cmd'] == 'update':
-				try:
-					uoj_download('/judger', 'judger_update.zip')
-					execute('unzip -o judger_update.zip && cd %s && make clean && make' % uoj_judger_path())
-				except:
-					print("error when update", file=sys.stderr)
-				if jconf['judger_name'] == 'main_judger':
-					uoj_sync_judge_client()
-				need_restart = True
-			elif task['cmd'] == 'stop':
-				taskQ.task_done()
-				socket_server_thread.join()
 
-				print_judge_client_status()
+class Judger:
-				print("goodbye!", file=sys.stderr)
+    problem_data_lock = RWLock()
+    send_and_fetch_lock = RLock()
 
-				sys.exit(0)
+    judger_id: int
+    cpus: str
+    main_path: str
+    submission: Optional[dict]
+    submission_judged: bool
+    main_thread: Optional[Thread]
+    report_thread: Optional[Thread]
+    _taskQ: Queue
 
-			taskQ.task_done()
+    def log_judge_client_status(self):
-	except Empty:
+        logging.info('submission: ' + str(self.submission))
-		pass
 
-	if need_restart:
+    def __init__(self, judger_id, cpus):
-		os.execl('./judge_client', './judge_client')
+        self.judger_id = judger_id
+        self.cpus = cpus
+        self.main_path = '/tmp/' + jconf['judger_name'] + '/' + str(self.judger_id)
+        self.submission = None
+        self.main_thread = Thread(target=self._main_loop)
+        self.report_thread = None
+        self.submission_judged = False
+        self._taskQ = Queue()
 
-def print_judge_client_status():
+    def start(self):
-	print('[' + time.asctime() + ']', end=' ', file=sys.stderr)
+        execute('mkdir -p %s' % (self.main_path + '/result'))
-	if submission != None:
+        execute('mkdir -p %s' % (self.main_path + '/work'))
-		print(submission, end=' ', file=sys.stderr)
-	print(file=sys.stderr)
 
-# interact with uoj_judger
+        self.log_judge_client_status()
-def get_judger_result():
+        logging.info('hello from judger #%d' % self.judger_id)
-	res = {}
-	with open(uoj_judger_path('/result/result.txt'), 'r') as fres:
-		res['score'] = 0
-		res['time'] = 0
-		res['memory'] = 0
-		while True:
-			line = fres.readline()
-			if line == '':
-				break
-			line = line.strip()
-			if line == 'details':
-				res['details'] = fres.read()
-				break
 
-			sp = line.split()
+        self.main_thread.start()
-			assert len(sp) >= 1
-			if sp[0] == 'error':
-				res['error'] = line[len('error') + 1:]
-			else:
-				assert len(sp) == 2
-				res[sp[0]] = sp[1]
-		res['score'] = int(res['score'])
-		res['time'] = int(res['time'])
-		res['memory'] = int(res['memory'])
-	res['status'] = 'Judged'
-	return res
 
-def update_problem_data(problem_id, problem_mtime):
+    def suspend(self):
-	try:
+        self._taskQ.put('suspend')
-		if jconf['judger_name'] == 'main_judger':
+        self._taskQ.join()
-			return
-		copy_name = uoj_judger_path('/data/%d' % problem_id)
-		copy_zip_name = uoj_judger_path('/data/%d.zip' % problem_id)
-		if os.path.isdir(copy_name):
-			quoted_copy_name = pipes.quote(copy_name)
-			if os.path.getmtime(copy_name) >= problem_mtime:
-				execute('touch -a %s' % quoted_copy_name)
-				return
-			else:
-				execute('chmod 700 %s -R && rm -rf %s' % (quoted_copy_name, quoted_copy_name))
-		del_list = sorted(os.listdir(uoj_judger_path('/data')), key=lambda fname: os.path.getatime(uoj_judger_path('/data/%s' % fname)))[:-99]
-		for fname in del_list:
-			quoted_fname = pipes.quote(uoj_judger_path('/data/%s' % fname))
-			os.system('chmod 700 %s -R && rm -rf %s' % (quoted_fname, quoted_fname))
 
-		uoj_download('/problem/%d' % problem_id, copy_zip_name)
+    def resume(self):
-		execute('cd %s && unzip -o -q %d.zip && rm %d.zip && chmod -w %d -R' % (uoj_judger_path('/data'), problem_id, problem_id, problem_id))
+        self._taskQ.put('resume')
-	except Exception:
+        self._taskQ.join()
-		print_judge_client_status()
-		traceback.print_exc()
-		raise Exception('failed to update problem data of #%d' % problem_id)
-	else:
-		print_judge_client_status()
-		print('updated problem data of #%d successfully' % problem_id, file=sys.stderr)
 
-def judge():
+    def exit(self):
-	global report_thread
+        self._taskQ.put('exit')
-	global submission_judged
+        self._taskQ.join()
+        self.main_thread.join()
 
-	clean_up_folder(uoj_judger_path('/work'))
+    # report thread
-	clean_up_folder(uoj_judger_path('/result'))
+    def _report_loop(self):
-	update_problem_data(submission['problem_id'], submission['problem_mtime'])
+        if 'is_hack' in self.submission:
+            return
+        while not self.submission_judged:
+            try:
+                with open(self.main_path + '/result/cur_status.txt', 'r') as f:
+                    fcntl.flock(f, fcntl.LOCK_SH)
+                    try:
+                        status = f.read(100)
+                    except Exception:
+                        status = None
+                    finally:
+                        fcntl.flock(f, fcntl.LOCK_UN)
 
-	with open(uoj_judger_path('/work/submission.conf'), 'w') as fconf:
+                if status != None:
-		uoj_download(submission['content']['file_name'], uoj_judger_path('/work/all.zip'))
+                    data = {}
-		execute("cd %s && unzip -o -q all.zip && rm all.zip" % pipes.quote(uoj_judger_path('/work')))
+                    data['update-status'] = True
-		for k, v in submission['content']['config']:
+                    data['id'] = self.submission['id']
-			print(k, v, file=fconf)
+                    if 'is_custom_test' in self.submission:
+                        data['is_custom_test'] = True
+                    data['status'] = status
+                    uoj_interact(data)
+                time.sleep(0.2)
+            except Exception:
+                pass
 
-		if 'is_hack' in submission:
+    def _get_result(self):
-			if submission['hack']['input_type'] == 'USE_FORMATTER':
+        res = {}
-				uoj_download(submission['hack']['input'], uoj_judger_path('/work/hack_input_raw.txt'))
+        with open(self.main_path + '/result/result.txt', 'r', encoding='utf-8', errors='uoj_text_replace') as fres:
-				execute('%s <%s >%s' % (
+            res['score'] = 0
-					pipes.quote(uoj_judger_path('/run/formatter')),
+            res['time'] = 0
-					pipes.quote(uoj_judger_path('/work/hack_input_raw.txt')),
+            res['memory'] = 0
-					pipes.quote(uoj_judger_path('/work/hack_input.txt'))))
+            while True:
-			else:
+                line = fres.readline()
-				uoj_download(submission['hack']['input'], uoj_judger_path('/work/hack_input.txt'))
+                if line == '':
-			print('test_new_hack_only on', file=fconf)
+                    break
-		elif 'is_custom_test' in submission:
+                line = line.strip()
-			print('custom_test on', file=fconf)
+                if line == 'details':
+                    res['details'] = fres.read()
+                    break
 
-	report_thread = Thread(target = report_loop)
+                sp = line.split()
-	report_thread.setDaemon(True)
+                assert len(sp) >= 1
+                if sp[0] == 'error':
+                    res['error'] = line[len('error') + 1:]
+                else:
+                    assert len(sp) == 2
+                    res[sp[0]] = sp[1]
+            res['score'] = int(res['score'])
+            res['time'] = int(res['time'])
+            res['memory'] = int(res['memory'])
+        res['status'] = 'Judged'
+        return res
 
-	submission_judged = False
+    def _remove_problem_data(self, problem_id):
-	report_thread.start()
+        quoted_path = pipes.quote(uoj_judger_path(f'/data/{problem_id}'))
-	execute(pipes.quote(uoj_judger_path('/main_judger')))
+        execute(f'chmod 700 {quoted_path} -R && rm -rf {quoted_path}')
-	submission_judged = True
+
-	report_thread.join()
+    def _update_problem_data_atime(self, problem_id):
+        path = uoj_judger_path(f'/data/{problem_id}')
+        execute(f'touch -a {pipes.quote(path)}')
+
+    def _update_problem_data(self, problem_id, problem_mtime):
+        Judger.problem_data_lock.acquire_read()
+        try:
+            copy_name = uoj_judger_path(f'/data/{problem_id}')
+            copy_zip_name = uoj_judger_path(f'/data/{problem_id}.zip')
+            if os.path.isdir(copy_name):
+                if os.path.getmtime(copy_name) >= problem_mtime:
+                    self._update_problem_data_atime(problem_id)
+                    return
+                else:
+                    Judger.problem_data_lock.promote()
+                    self._remove_problem_data(problem_id)
+            else:
+                Judger.problem_data_lock.promote()
+
+            del_list = sorted(os.listdir(uoj_judger_path('/data')),
+                              key=lambda p: os.path.getatime(uoj_judger_path(f'/data/{p}')))[:-99]
+            for p in del_list:
+                self._remove_problem_data(p)
+
+            uoj_download(f'/problem/{problem_id}', copy_zip_name)
+            execute('cd %s && unzip -q %d.zip && rm %d.zip && chmod -w %d -R' % (
+                uoj_judger_path('/data'), problem_id, problem_id, problem_id))
+            os.utime(uoj_judger_path(f'/data/{problem_id}'), (time.time(), problem_mtime))
+        except Exception:
+            self.log_judge_client_status()
+            logging.exception('problem update error')
+            raise Exception(f'failed to update problem data of #{problem_id}')
+        else:
+            self.log_judge_client_status()
+            logging.info(f'updated problem data of #{problem_id} successfully')
+        finally:
+            Judger.problem_data_lock.release()
+
+    def _judge(self):
+        clean_up_folder(self.main_path + '/work')
+        clean_up_folder(self.main_path + '/result')
+        self._update_problem_data(self.submission['problem_id'], self.submission['problem_mtime'])
+
+        with open(self.main_path + '/work/submission.conf', 'w') as fconf:
+            uoj_download(self.submission['content']['file_name'], self.main_path + '/work/all.zip')
+            execute("cd %s && unzip -q all.zip && rm all.zip" % pipes.quote(self.main_path + '/work'))
+            for k, v in self.submission['content']['config']:
+                print(k, v, file=fconf)
+
+            if 'is_hack' in self.submission:
+                if self.submission['hack']['input_type'] == 'USE_FORMATTER':
+                    uoj_download(self.submission['hack']['input'], self.main_path + '/work/hack_input_raw.txt')
+                    execute('%s <%s >%s' % (
+                        pipes.quote(uoj_judger_path('/run/formatter')),
+                        pipes.quote(self.main_path + '/work/hack_input_raw.txt'),
+                        pipes.quote(self.main_path + '/work/hack_input.txt')
+                    ))
+                else:
+                    uoj_download(self.submission['hack']['input'], self.main_path + '/work/hack_input.txt')
+                print('test_new_hack_only on', file=fconf)
+            elif 'is_custom_test' in self.submission:
+                print('custom_test on', file=fconf)
+
+        self.submission_judged = False
+        self.report_thread = Thread(target=self._report_loop)
+        self.report_thread.start()
+
+        Judger.problem_data_lock.acquire_read()
+        try:
+            main_judger_cmd = pipes.quote(uoj_judger_path('/main_judger'))
+            if self.cpus != 'all':
+                main_judger_cmd = 'taskset -c %s %s' % (pipes.quote(self.cpus), main_judger_cmd)
+            execute('cd %s && %s' % (pipes.quote(self.main_path), main_judger_cmd))
+        finally:
+            Judger.problem_data_lock.release()
+        self.submission_judged = True
+        self.report_thread.join()
+        self.report_thread = None
+
+        return self._get_result()
+
+    def _send_and_fetch(self, result=None, fetch_new=True):
+        """send judgement result, and fetch new submission to judge"""
+
+        data = {}
+        files = {}
+
+        if not fetch_new:
+            data['fetch_new'] = False
+
+        if result is not None:
+            data['submit'] = True
+            if 'is_hack' in self.submission:
+                data['is_hack'] = True
+                data['id'] = self.submission['hack']['id']
+                if result != False and result['score']:
+                    try:
+                        logging.info("succ hack!")
+                        files = {
+                            ('hack_input', open(self.main_path + '/work/hack_input.txt', 'rb')),
+                            ('std_output', open(self.main_path + '/work/std_output.txt', 'rb'))
+                        }
+                    except Exception:
+                        self.log_judge_client_status()
+                        logging.exception('hack: submit error')
+                        result = False
+            elif 'is_custom_test' in self.submission:
+                data['is_custom_test'] = True
+                data['id'] = self.submission['id']
+            else:
+                data['id'] = self.submission['id']
+
+            if 'judge_time' in self.submission:
+                data['judge_time'] = self.submission['judge_time']
+
+            if 'tid' in self.submission:
+                data['tid'] = self.submission['tid']
+
+            if result == False:
+                result = {
+                    'score': 0,
+                    'error': 'Judgment Failed',
+                    'details': 'Unknown Error'
+                }
+            result['status'] = 'Judged'
+            data['result'] = json.dumps(result, ensure_ascii=False)
+
+        while True:
+            Judger.send_and_fetch_lock.acquire()
+            try:
+                ret = uoj_interact(data, files)
+            except Exception:
+                self.log_judge_client_status()
+                logging.exception('uoj_interact error')
+            else:
+                break
+            finally:
+                Judger.send_and_fetch_lock.release()
+            time.sleep(2)
+
+        try:
+            self.submission = json.loads(ret)
+        except Exception:
+            if ret != 'Nothing to judge':
+                logging.info(ret)
+            self.submission = None
+            return False
+        else:
+            return True
+
+    def _main_loop(self):
+        while True:
+            if not self._taskQ.empty():
+                while True:
+                    task = self._taskQ.get()
+                    if task == 'resume':
+                        self._taskQ.task_done()
+                        break
+                    elif task == 'exit':
+                        self._taskQ.task_done()
+                        return
+                    else:
+                        self._taskQ.task_done()
+
+            if not self._send_and_fetch():
+                time.sleep(2)
+                continue
+
+            self.log_judge_client_status()
+            logging.info('judging')
+
+            while True:
+                try:
+                    res = self._judge()
+                except Exception:
+                    self.log_judge_client_status()
+                    logging.exception('judge error')
+                    res = False
+                if not self._send_and_fetch(result=res, fetch_new=self._taskQ.empty()):
+                    break
+
+
+class JudgerServer:
+    taskQ: Queue
+    judgers: List[Judger]
+    socket_thread: Thread
+
+    def __init__(self):
+        self.taskQ = Queue()
+        self.judgers = [Judger(i, cpus) for i, cpus in enumerate(jconf['judger_cpus'])]
+        self.socket_thread = Thread(target=self._socket_loop)
+
+    def _socket_loop(self):
+        try:
+            SOCK_CLOEXEC = 524288
+            with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM | SOCK_CLOEXEC)) as s:
+                s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+                s.bind(('', jconf['socket_port']))
+                s.listen(5)
+
+                while True:
+                    try:
+                        conn, addr = s.accept()
+                        with closing(conn) as conn:
+                            data = conn.recv(1024)
+                            assert data != None
+                            task = json.loads(data)
+                            assert task['password'] == jconf['socket_password']
+                            assert 'cmd' in task
+
+                            self.taskQ.put(task)
+
+                            if task['cmd'] == 'stop':
+                                logging.info('the judge client is closing...')
+                                self.taskQ.join()
+                                conn.sendall(b'ok')
+                                return 'stop'
+                    except Exception:
+                        logging.exception('connection rejected')
+                    else:
+                        logging.info('a new task accomplished')
+        except Exception:
+            self.taskQ.put({'cmd': 'stop'})
+            logging.exception('socket server error!')
+
+    def run(self):
+        self.socket_thread.start()
+        for judger in self.judgers:
+            judger.start()
+
+        while True:
+            task = self.taskQ.get()
+
+            need_restart = False
+            block_wait = False
+
+            for judger in self.judgers:
+                judger.suspend()
+
+            try:
+                while True:
+                    if task['cmd'] in ['update', 'self-update']:
+                        try:
+                            uoj_download('/judger', 'judger_update.zip')
+                            execute('unzip -o judger_update.zip && cd %s && make clean && make' % uoj_judger_path())
+                        except:
+                            print(sys.stderr, "error when update")
+                        if jconf['judger_name'] == 'main_judger':
+                            uoj_sync_judge_client()
+                        need_restart = True
+                    elif task['cmd'] == 'stop':
+                        self.taskQ.task_done()
+                        self.socket_thread.join()
+                        for judger in self.judgers:
+                            judger.exit()
+                        logging.info("goodbye!")
+                        sys.exit(0)
+
+                    self.taskQ.task_done()
+                    task = self.taskQ.get(block=block_wait)
+            except Empty:
+                pass
+
+            if need_restart:
+                os.execl('./judge_client', './judge_client')
+
+            for judger in self.judgers:
+                judger.resume()
 
-	return get_judger_result()
 
 # interact with uoj web server
-def uoj_interact(data, files = {}):
+# TODO: set a larger timeout
-	data = data.copy()
+def uoj_interact(data, files={}):
-	data.update({
+    data = data.copy()
-		'judger_name': jconf['judger_name'],
+    data.update({
-		'password': jconf['judger_password']
+        'judger_name': jconf['judger_name'],
-	})
+        'password': jconf['judger_password']
-	return requests.post(uoj_url('/judge/submit'), data=data, files=files).text
+    })
+    return requests.post(uoj_url('/judge/submit'), data=data, files=files).text
+
+
 def uoj_download(uri, filename):
-	data = {
+    data = {
-		'judger_name': jconf['judger_name'],
+        'judger_name': jconf['judger_name'],
-		'password': jconf['judger_password']
+        'password': jconf['judger_password']
-	}
+    }
-	with open(filename, 'wb') as f:
+    with open(filename, 'wb') as f:
-		r = requests.post(uoj_url('/judge/download' + uri), data=data, stream=True)
+        r = requests.post(uoj_url('/judge/download' + uri), data=data, stream=True)
-		for chunk in r.iter_content(chunk_size=65536):
+        for chunk in r.iter_content(chunk_size=65536):
-			if chunk:
+            if chunk:
-				f.write(chunk)
+                f.write(chunk)
+
+
 def uoj_sync_judge_client():
-	data = {
+    data = {
-		'judger_name': jconf['judger_name'],
+        'judger_name': jconf['judger_name'],
-		'password': jconf['judger_password']
+        'password': jconf['judger_password']
-	}
+    }
-	ret = requests.post(uoj_url('/judge/sync-judge-client'), data=data).text
+    ret = requests.post(uoj_url('/judge/sync-judge-client'), data=data).text
-	if ret != "ok":
+    if ret != "ok":
-		raise Exception('failed to sync judge clients: %s' % ret)
+        raise Exception('failed to sync judge clients: %s' % ret)
 
-def send_and_fetch(result = None, fetch_new = True):
-	global submission
-	
-	"""send judgement result, and fetch new submission to judge"""
-	
-	data = {}
-	files = {}
-	
-	if not fetch_new:
-		data['fetch_new'] = False
-	
-	if result != None:
-		data['submit'] = True
-		if 'is_hack' in submission:
-			data['is_hack'] = True
-			data['id'] = submission['hack']['id']
-			if result != False and result['score']:
-				try:
-					print("succ hack!", file=sys.stderr)
-					files = {
-						('hack_input', open('uoj_judger/work/hack_input.txt', 'r')),
-						('std_output', open('uoj_judger/work/std_output.txt', 'r'))
-					}
-				except Exception:
-					print_judge_client_status()
-					traceback.print_exc()
-					result = False
-		elif 'is_custom_test' in submission:
-			data['is_custom_test'] = True
-			data['id'] = submission['id']
-		else:
-			data['id'] = submission['id']
-		
-		if result == False:
-			result = {
-				'score': 0,
-				'error': 'Judgement Failed',
-				'details': 'Unknown Error'
-			}
-		result['status'] = 'Judged'
-		data['result'] = json.dumps(result, ensure_ascii=False)
-	
-	while True:
-		try:
-			ret = uoj_interact(data, files)
-			print(ret)
-		except Exception:
-			print_judge_client_status()
-			traceback.print_exc()
-		else:
-			break
-		time.sleep(2)
-	
-	try:
-		submission = json.loads(ret)
-	except Exception as e:
-		submission = None
-		return False
-	else:
-		return True
-
-# judge client
-def judger_loop():
-	ok = False
-	while True:
-		fetch_new = True
-		
-		if ok and not (taskQ.empty() and socket_server_thread.isAlive()):
-			fetch_new = False
-				
-		if not ok:
-			while True:
-				if not taskQ.empty():
-					handle_task()
-				if not socket_server_thread.isAlive():
-					raise Exception('socket server exited unexpectedly')
-				
-				if send_and_fetch():
-					break
-				
-				print('['+time.asctime()+']', 'Nothing to judge...')
-				time.sleep(2)
-			
-			ok = True
-			print_judge_client_status()
-			print('judging', file=sys.stderr)
-		
-		try:
-			res = judge()
-		except Exception:
-			print_judge_client_status()
-			traceback.print_exc()
-			res = False
-		
-		ok = send_and_fetch(result=res,fetch_new=fetch_new)
 
 # main function
 def main():
-	init()
+    init()
+
+    logging.basicConfig(filename='log/judge.log', level=logging.INFO,
+                        format='%(asctime)-15s [%(levelname)s]: %(message)s')
+
+    if len(sys.argv) == 1:
+        JudgerServer().run()
+    if len(sys.argv) == 2:
+        if sys.argv[1] == 'start':
+            pid = os.fork()
+            if pid == -1:
+                raise Exception('fork failed')
+            elif pid > 0:
+                return
+            else:
+                freopen(sys.stdout, open(os.devnull, 'w'))
+                freopen(sys.stderr, open('log/judge.log', 'a', encoding='utf-8', errors='uoj_text_replace'))
+                JudgerServer().run()
+        elif sys.argv[1] in ['update', 'self-update']:
+            try:
+                try:
+                    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
+                        s.connect(('127.0.0.1', jconf['socket_port']))
+                        s.sendall(json.dumps({
+                            'password': jconf['socket_password'],
+                            'cmd': sys.argv[1]
+                        }).encode())
+                    return
+                except OSError:
+                    JudgerServer.update(broadcast=sys.argv[1] == 'update')
+                    return
+            except Exception:
+                logging.exception('update error')
+                raise Exception('update failed')
+        elif sys.argv[1] == 'stop':
+            try:
+                with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
+                    s.connect(('127.0.0.1', jconf['socket_port']))
+                    s.sendall(json.dumps({
+                        'password': jconf['socket_password'],
+                        'cmd': 'stop'
+                    }).encode())
+                    if s.recv(10) != b'ok':
+                        raise Exception('stop failed')
+                return
+            except Exception:
+                logging.exception('stop error')
+                raise Exception('stop failed')
+    raise Exception('invalid argument')
 
-	if len(sys.argv) == 1:
-		start_judger_server()
-	if len(sys.argv) == 2:
-		if sys.argv[1] == 'start':
-			pid = os.fork()
-			if pid == -1:
-				raise Exception('fork failed')
-			elif pid > 0:
-				return
-			else:
-				freopen(sys.stdout, open(os.devnull, 'wb'))
-				freopen(sys.stderr, open('log/judge.log', 'ab', buffering=0))
-				start_judger_server()
-		elif sys.argv[1] == 'update':
-			try:
-				with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
-					s.connect(('127.0.0.1', jconf['socket_port']))
-					s.sendall(json.dumps({
-						'password': jconf['socket_password'],
-						'cmd': 'update'
-					}).encode())
-				return
-			except Exception:
-				traceback.print_exc()
-				raise Exception('update failed')
-		elif sys.argv[1] == 'stop':
-			try:
-				with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
-					s.connect(('127.0.0.1', jconf['socket_port']))
-					s.sendall(json.dumps({
-						'password': jconf['socket_password'],
-						'cmd': 'stop'
-					}).encode())
-					if s.recv(10).decode() != 'ok':
-						raise Exception('stop failed')
-				return
-			except Exception:
-				traceback.print_exc()
-				raise Exception('stop failed')
-	raise Exception('invalid argument')
 
 try:
-	main()
+    main()
 except Exception:
-	print_judge_client_status()
+    logging.exception('critical error!')
-	traceback.print_exc()
+    sys.exit(1)
-	sys.exit(1)

judger/uoj_judger/Makefile

@@ -1,5 +1,5 @@
 INCLUDE_PATH = include
-CXXFLAGS = -I./include -O2
+CXXFLAGS = -I./include -O2 --std=c++17 -Wall -lstdc++fs
 
 EXE_CHECKER = \
 	builtin/checker/bcmp \
@@ -26,24 +26,35 @@ EXE = main_judger \
 	run/formatter \
 	run/run_program \
 	run/run_interaction \
-	builtin/judger/judger
+	run/compile \
+	builtin/judger/judger \
+	$(EXE_CHECKER)
 
-all: $(EXE) $(EXE_CHECKER)
+OBJ = tests/catch_amalgamated.o tests/test.o
-runner: $(EXE)
+
-checker: $(EXE_CHECKER)
+all: $(EXE)
 
 % : %.cpp
 	$(CXX) $(CXXFLAGS) $(EXTRA_CXXFLAGS) $< -o $@
 
-run/run_program: include/uoj_env.h run/run_program_conf.h
+run/formatter       : include/testlib.h
-run/formatter  : include/testlib.h
+run/compile         : include/uoj_run.h
-run/run_interaction: run/run_interaction.cpp include/uoj_env.h
-	$(CXX) $(CXXFLAGS) --std=c++11 -pthread $< -o $@
 
-builtin/judger/judger: include
+run/run_program     : run/run_program.cpp run/run_program_conf.h run/run_program_sandbox.h include/uoj_run.h
-main_judger: include
+	$(CXX) $(CXXFLAGS) $< -o $@ -lseccomp -pthread
+
+run/run_interaction : run/run_interaction.cpp include/uoj_run.h
+	$(CXX) $(CXXFLAGS) $< -o $@ -pthread
+
+builtin/judger/judger: include/*.h
+main_judger: include/*.h
+
+tests/test.o: include/*.h
+
+tests/test: tests/catch_amalgamated.o tests/test.o
+	$(CXX) $(CXXFLAGS) $^ -o $@ -pthread
 
 $(EXE_CHECKER): include/testlib.h
 
 clean:
-	rm -f $(EXE) $(EXE_CHECKER)
+	rm -f $(EXE) $(OBJ)

judger/uoj_judger/builtin/judger/judger.cpp

@@ -1,150 +1,51 @@
 #include "uoj_judger.h"
 
-struct SubtaskInfo {
+PointInfo submit_answer_test_point_with_auto_generation(int i, TestPointConfig tpc = TestPointConfig()) {
-	bool passed;
+	static set<string> compiled;
-	int score;
+	static set<int> generated;
 
-	SubtaskInfo() {
+	int output_file_id = conf_int("output_file_id", i, i);
+	tpc.submit_answer = true;
+	tpc.output_file_name = work_path + "/" + conf_output_file_name(conf_int("output_file_id", i, i));
+
+	string gen_name = conf_str("output_gen", output_file_id, "");
+	if (gen_name.empty()) {
+		generated.insert(output_file_id);
+	}
+	if (generated.count(output_file_id)) {
+		return test_point("", i, tpc);
 	}
-	SubtaskInfo(const bool &_p, const int &_s)
-		: passed(_p), score(_s){}
-};
 
-void ordinary_test() {
+	tpc.limit = conf_run_limit("gen", output_file_id, RL_GENERATOR_DEFAULT);
-	int n = conf_int("n_tests", 10);
+	generated.insert(output_file_id);
-	int m = conf_int("n_ex_tests", 0);
-	int nT = conf_int("n_subtasks", 0);
 
-	if (!conf_is("submit_answer", "on")) {
+	if (!compiled.count(gen_name)) {
-		report_judge_status_f("Compiling");
+		report_judge_status_f("Compiling %s", gen_name.c_str());
-		RunCompilerResult c_ret = !conf_is("with_implementer", "on") ? compile("answer") : compile_with_implementer("answer");
+		if (auto c_ret = compile_submission_program(gen_name); !c_ret.succeeded) {
-		if (!c_ret.succeeded) {
 			end_judge_compile_error(c_ret);
 		}
+		compiled.insert(gen_name);
 	}
 
-	bool passed = true;
+	tpc.submit_answer = false;
-	if (nT == 0) {
+	return test_point(gen_name, i, tpc);
-		for (int i = 1; i <= n; i++) {
+}
-			report_judge_status_f("Judging Test #%d", i);
+
-			PointInfo po = test_point("answer", i);
+void ordinary_test() {
-			if (po.scr != 100) {
+	if (conf_is("submit_answer", "on")) {
-				passed = false;
+		PrimaryDataTestConfig pdtc;
-			}
+		pdtc.disable_ex_tests = true;
-			po.scr = scale_score(po.scr, conf_int("point_score", i, 100 / n));
+		primary_data_test([](int i) {
-			add_point_info(po);
+			return submit_answer_test_point_with_auto_generation(i);
-		}
+		}, pdtc);
-	} else if (nT == 1 && conf_str("subtask_type", 1, "packed") == "packed") {
-		for (int i = 1; i <= n; i++) {
-			report_judge_status_f("Judging Test #%d", i);
-			PointInfo po = test_point("answer", i);
-			if (po.scr != 100) {
-				passed = false;
-				po.scr = i == 1 ? 0 : -100;
-				add_point_info(po);
-				break;
-			} else {
-				po.scr = i == 1 ? 100 : 0;
-				add_point_info(po);
-			}
-		}
 	} else {
-		map<int, SubtaskInfo> subtasks;
+		report_judge_status_f("Compiling");
-		map<int,int> minScore;
+		if (auto c_ret = compile_submission_program("answer"); !c_ret.succeeded) {
-		for (int t = 1; t <= nT; t++) {
+			end_judge_compile_error(c_ret);
-			string subtaskType = conf_str("subtask_type", t, "packed");
-			int startI = conf_int("subtask_end", t - 1, 0) + 1;
-			int endI = conf_int("subtask_end", t, 0);
-
-			vector<PointInfo> points;
-			minScore[t] = 100;
-
-			vector<int> dependences;
-			if (conf_str("subtask_dependence", t, "none") == "many") {
-				string cur = "subtask_dependence_" + vtos(t);
-				int p = 1;
-				while (conf_int(cur, p, 0) != 0) {
-					dependences.push_back(conf_int(cur, p, 0));
-					p++;
-				}
-			} else if (conf_int("subtask_dependence", t, 0) != 0) {
-				dependences.push_back(conf_int("subtask_dependence", t, 0));
-			}
-			bool skipped = false;
-			for (vector<int>::iterator it = dependences.begin(); it != dependences.end(); it++) {
-				if (subtaskType == "packed") {
-					if (!subtasks[*it].passed) {
-						skipped = true;
-						break;
-					}
-				} else if (subtaskType == "min") {
-					minScore[t] = min(minScore[t], minScore[*it]);
-				}
-			}
-			if (skipped) {
-				add_subtask_info(t, 0, "Skipped", points);
-				continue;
-			}
-
-			int tfull = conf_int("subtask_score", t, 100 / nT);
-			int tscore = scale_score(minScore[t], tfull);
-			string info = "Accepted";
-			for (int i = startI; i <= endI; i++) {
-				report_judge_status_f("Judging Test #%d of Subtask #%d", i, t);
-				PointInfo po = test_point("answer", i);
-				if (subtaskType == "packed") {
-					if (po.scr != 100) {
-						passed = false;
-						po.scr = i == startI ? 0 : -tfull;
-						tscore = 0;
-						points.push_back(po);
-						info = po.info;
-						break;
-					} else {
-						po.scr = i == startI ? tfull : 0;
-						tscore = tfull;
-						points.push_back(po);
-					}
-				} else if (subtaskType == "min") {
-					minScore[t] = min(minScore[t], po.scr);
-					if (po.scr != 100) {
-						passed = false;
-					}
-					po.scr = scale_score(po.scr, tfull);
-					if (po.scr <= tscore) {
-						tscore = po.scr;
-						points.push_back(po);
-						info = po.info;
-					} else {
-						points.push_back(po);
-					}
-				}
-			}
-
-			subtasks[t] = SubtaskInfo(info == "Accepted", tscore);
-
-			add_subtask_info(t, tscore, info, points);
 		}
-	}
+		primary_data_test([](int i) {
-	if (conf_is("submit_answer", "on") || !passed) {
+			return test_point("answer", i);
-		end_judge_ok();
+		});
-	}
-
-	tot_score = 100;
-	for (int i = 1; i <= m; i++) {
-		report_judge_status_f("Judging Extra Test #%d", i);
-		PointInfo po = test_point("answer", -i);
-		if (po.scr != 100) {
-			po.num = -1;
-			po.info = "Extra Test Failed : " + po.info + " on " + vtos(i);
-			po.scr = -3;
-			add_point_info(po);
-			end_judge_ok();
-		}
-	}
-	if (m != 0) {
-		PointInfo po(-1, 0, -1, -1, "Extra Test Passed", "", "", "");
-		add_point_info(po);
 	}
 	end_judge_ok();
 }
@@ -153,8 +54,7 @@ void hack_test() {
 	if (conf_is("submit_answer", "on")) {
 		end_judge_judgement_failed("Hack is not supported in this problem.");
 	} else {
-		RunCompilerResult c_ret = !conf_is("with_implementer", "on") ? compile("answer") : compile_with_implementer("answer");
+		if (auto c_ret = compile_submission_program("answer"); !c_ret.succeeded) {
-		if (!c_ret.succeeded) {
 			end_judge_compile_error(c_ret);
 		}
 		TestPointConfig tpc;
@@ -170,80 +70,52 @@ void hack_test() {
 
 void sample_test() {
 	if (conf_is("submit_answer", "on")) {
-		int n = conf_int("n_tests", 10);
+		if (conf_is("check_existence_only_in_sample_test", "on")) {
-		for (int i = 1; i <= n; i++) {
+			main_data_test([](int i) {
-			report_judge_status_f("Judging Test #%d", i);
-			if (conf_is("check_existence_only_in_sample_test", "on")) {
 				TestPointConfig tpc = TestPointConfig();
-				tpc.auto_complete(i);
+				tpc.checker = "nonempty";
-
+				return submit_answer_test_point_with_auto_generation(i, tpc);
-				string usrout = file_preview(tpc.output_file_name);
+			});
-				if (usrout == "") {
+		} else {
-					add_point_info(PointInfo(i, 0, -1, -1,
+			main_data_test([](int i) {
-							"default",
+				PointInfo po = submit_answer_test_point_with_auto_generation(i);
-							file_preview(tpc.input_file_name), usrout,
-							"wrong answer empty file\n"));
-				} else {
-					PointInfo po = PointInfo(i, 100, -1, -1,
-							"default",
-							file_preview(tpc.input_file_name), usrout,
-							"ok nonempty file\n");
-					po.scr = scale_score(po.scr, conf_int("point_score", i, 100 / n));
-					add_point_info(po);
-				}
-			} else {
-				PointInfo po = test_point("answer", i);
 				if (po.scr != 0) {
 					po.info = "Accepted";
 					po.scr = 100;
 				}
-				po.scr = scale_score(po.scr, conf_int("point_score", i, 100 / n));
 				po.res = "no comment";
-				add_point_info(po);
+				return po;
-			}
+			});
 		}
 		end_judge_ok();
 	} else {
 		report_judge_status_f("Compiling");
-		RunCompilerResult c_ret = !conf_is("with_implementer", "on") ? compile("answer") : compile_with_implementer("answer");
+		if (auto c_ret = compile_submission_program("answer"); !c_ret.succeeded) {
-		if (!c_ret.succeeded) {
 			end_judge_compile_error(c_ret);
 		}
 
-		int n = conf_int("n_sample_tests", 0);
+		sample_data_test([](int i) {
-		bool passed = true;
+			return test_point("answer", i);
-		for (int i = 1; i <= n; i++) {
+		});
-			report_judge_status_f("Judging Sample Test #%d", i);
-			PointInfo po = test_point("answer", -i);
-			po.num = i;
-			if (po.scr != 100) {
-				passed = false;
-			}
-			po.scr = scale_score(po.scr, 100 / n);
-			add_point_info(po);
-		}
-		if (passed) {
-			tot_score = 100;
-		}
 		end_judge_ok();
 	}
 }
 
 void custom_test() {
-	if (conf_is("submit_answer", "on")) {
+	report_judge_status_f("Compiling");
-		end_judge_judgement_failed("Custom test is not supported in this problem.");
+	if (auto c_ret = compile_submission_program("answer"); !c_ret.succeeded) {
-	} else {
+		end_judge_compile_error(c_ret);
-		report_judge_status_f("Compiling");
-		RunCompilerResult c_ret = !conf_is("with_implementer", "on") ? compile("answer") : compile_with_implementer("answer");
-		if (!c_ret.succeeded) {
-			end_judge_compile_error(c_ret);
-		}
-		
-		report_judge_status_f("Judging");
-		add_custom_test_info(ordinary_custom_test("answer"));
-		
-		end_judge_ok();
 	}
+
+	CustomTestConfig ctc;
+	if (conf_is("submit_answer", "on")) {
+		ctc.base_limit = conf_run_limit("gen", 0, RL_GENERATOR_DEFAULT);
+	}
+	
+	report_judge_status_f("Judging");
+	add_custom_test_info(ordinary_custom_test("answer", ctc));
+	
+	end_judge_ok();
 }
 
 int main(int argc, char **argv) {

judger/uoj_judger/include/uoj_env.h

@@ -1,38 +0,0 @@
-#include "uoj_work_path.h"
-
-#define UOJ_DATA_PATH UOJ_WORK_PATH "/data"
-#define UOJ_RESULT_PATH UOJ_WORK_PATH "/result"
-
-#define RS_SPJ_BASE 1000
-#define failed_spj RS_SPJ_BASE
-#define successed_hack 100000
-#define RS_SPJ RS_SPJ_BASE
-#define RS_HACK successed_hack
-#define RS_AC 0
-#define RS_WA 1
-#define RS_RE 2
-#define RS_MLE 3
-#define RS_TLE 4
-#define RS_OLE 5
-#define RS_DGS 6
-#define RS_JGF 7
-#define RS_SPJ_AC (RS_SPJ + RS_AC)
-#define RS_SPJ_RE (RS_SPJ_BASE + RS_RE)
-#define RS_SPJ_MLE (RS_SPJ_BASE + RS_MLE)
-#define RS_SPJ_TLE (RS_SPJ_BASE + RS_TLE)
-#define RS_SPJ_OLE (RS_SPJ_BASE + RS_OLE)
-#define RS_SPJ_DGS (RS_SPJ_BASE + RS_DGS)
-#define RS_SPJ_JGF (RS_SPJ_BASE + RS_JGF)
-#define RS_HK_RE (successed_hack + RS_RE)
-#define RS_HK_MLE (successed_hack + RS_MLE)
-#define RS_HK_TLE (successed_hack + RS_TLE)
-#define RS_HK_OLE (successed_hack + RS_OLE)
-#define RS_HK_DGS (successed_hack + RS_DGS)
-#define RS_HK_JGF (successed_hack + RS_JGF)
-#define RS_HK_SPJ_RE (successed_hack + RS_SPJ_RE)
-#define RS_HK_SPJ_MLE (successed_hack + RS_SPJ_MLE)
-#define RS_HK_SPJ_TLE (successed_hack + RS_SPJ_TLE)
-#define RS_HK_SPJ_OLE (successed_hack + RS_SPJ_OLE)
-#define RS_HK_SPJ_DGS (successed_hack + RS_SPJ_DGS)
-#define RS_HK_SPJ_JGF (successed_hack + RS_SPJ_JGF)
-

judger/uoj_judger/include/uoj_run.h

@@ -0,0 +1,439 @@
+#include <string>
+#include <vector>
+#include <map>
+#include <sstream>
+#include <fstream>
+#include <cstdarg>
+#include <filesystem>
+#include <exception>
+#include <stdexcept>
+
+#define UOJ_GCC "/usr/bin/gcc-11"
+#define UOJ_GPLUSPLUS "/usr/bin/g++-11"
+#define UOJ_PYTHON2_7 "/usr/bin/python2.7"
+#define UOJ_PYTHON3 "/usr/bin/python3.10"
+#define UOJ_FPC "/usr/bin/fpc"
+#define UOJ_OPEN_JDK8 "/usr/lib/jvm/java-8-openjdk-amd64"
+#define UOJ_OPEN_JDK11 "/usr/lib/jvm/java-11-openjdk-amd64"
+#define UOJ_OPEN_JDK17 "/usr/lib/jvm/java-17-openjdk-amd64"
+
+std::string escapeshellarg(int arg) {
+	return std::to_string(arg);
+}
+std::string escapeshellarg(const std::string &arg) {
+	std::string res = "'";
+	for (char c : arg) {
+		if (c == '\'') {
+			res += "'\\''";
+		} else {
+			res += c;
+		}
+	}
+	res += "'";
+	return res;
+}
+
+template <typename T>
+std::ostream& spaced_out(std::ostream &out, const T &arg) {
+    return out << arg;
+}
+
+template <typename T, typename... Args>
+std::ostream& spaced_out(std::ostream &out, const T &arg, const Args& ...rest) {
+    return spaced_out(out << arg << " ", rest...);
+}
+
+template <typename T>
+std::ostream& add_spaced_out(std::ostream &out, const T &arg) {
+    return out << " " << arg;
+}
+
+template <typename T, typename... Args>
+std::ostream& add_spaced_out(std::ostream &out, const T &arg, const Args& ...rest) {
+    return spaced_out(out << " " << arg, rest...);
+}
+
+template <typename... Args>
+int execute(const Args& ...args) {
+    std::ostringstream sout;
+    spaced_out(sout, args...);
+#ifdef UOJ_SHOW_EVERY_CMD
+	std::cerr << sout.str() << std::endl;
+#endif
+	int status = system(sout.str().c_str());
+    if (status == -1 || !WIFEXITED(status)) {
+        return -1;
+    }
+    return WEXITSTATUS(status);
+}
+
+int executef(const char *fmt, ...) {
+	const int L = 1 << 10;
+	char cmd[L];
+	va_list ap;
+	va_start(ap, fmt);
+	int res = vsnprintf(cmd, L, fmt, ap);
+	if (res < 0 || res >= L) {
+		return -1;
+	}
+	res = execute(cmd);
+	va_end(ap);
+	return res;
+}
+
+class cannot_determine_class_name_error : std::invalid_argument {
+public:
+    explicit cannot_determine_class_name_error()
+        : std::invalid_argument("cannot determine the class name!") {}
+};
+
+std::string get_class_name_from_file(const std::string &fname) {
+	std::ifstream fin(fname);
+	if (!fin) {
+		throw cannot_determine_class_name_error();
+	}
+	std::string class_name;
+	if (!(fin >> class_name)) {
+		throw cannot_determine_class_name_error();
+	}
+	if (class_name.length() > 100) {
+		throw cannot_determine_class_name_error();
+	}
+	for (char &c : class_name) {
+		if (!isalnum(c) && c != '_') {
+			throw cannot_determine_class_name_error();
+		}
+	}
+	return class_name;
+}
+
+bool put_class_name_to_file(const std::string &fname, const std::string &class_name) {
+	std::ofstream fout(fname);
+	if (!fout) {
+		return false;
+	}
+	if (!(fout << class_name << std::endl)) {
+		return false;
+	}
+	return true;
+}
+
+std::map<std::string, std::string> lang_upgrade_map = {
+    {"Java7" , "Java8"      },
+    {"Java14", "Java17"     },
+    {"Python2", "Python2.7" },
+};
+
+std::string upgraded_lang(const std::string &lang) {
+	return lang_upgrade_map.count(lang) ? lang_upgrade_map[lang] : lang;
+}
+
+namespace runp {
+	namespace fs = std::filesystem;
+	fs::path run_path;
+
+	struct limits_t {
+		int time;
+		int memory;
+		int output;
+		int real_time;
+		int stack;
+
+		limits_t() = default;
+		limits_t(const int &_time, const int &_memory, const int &_output)
+				: time(_time), memory(_memory), output(_output), real_time(-1), stack(-1) {
+		}
+	};
+
+	// result type
+	enum RS_TYPE {
+		RS_AC = 0,
+		RS_WA = 1,
+		RS_RE = 2,
+		RS_MLE = 3,
+		RS_TLE = 4,
+		RS_OLE = 5,
+		RS_DGS = 6,
+		RS_JGF = 7
+	};
+
+	inline std::string rstype_str(RS_TYPE id)  {
+		switch (id) {
+		case RS_AC: return "Accepted";
+		case RS_WA: return "Wrong Answer";
+		case RS_RE : return "Runtime Error";
+		case RS_MLE: return "Memory Limit Exceeded";
+		case RS_TLE: return "Time Limit Exceeded";
+		case RS_OLE: return "Output Limit Exceeded";
+		case RS_DGS: return "Dangerous Syscalls";
+		case RS_JGF: return "Judgment Failed";
+		default    : return "Unknown Result";
+		}
+	}
+
+	inline std::string get_type_from_lang(std::string lang) {
+		lang = upgraded_lang(lang);
+		if (lang == "Python2.7") {
+			return "python2.7";
+		} else if (lang == "Python3") {
+			return "python3";
+		} else if (lang == "Java8") {
+			return "java8";
+		} else if (lang == "Java11") {
+			return "java11";
+		} else if (lang == "Java17") {
+			return "java17";
+		} else {
+			return "default";
+		}
+	}
+
+	struct result {
+		static std::string result_file_name;
+
+		RS_TYPE type;
+		std::string extra;
+		int ust, usm;
+		int exit_code;
+
+		result() = default;
+		result(RS_TYPE type, std::string extra, int ust = -1, int usm = -1, int exit_code = -1)
+				: type(type), extra(extra), ust(ust), usm(usm), exit_code(exit_code) {
+			if (this->type != RS_AC) {
+				this->ust = -1, this->usm = -1;
+			}
+		}
+
+		static result failed_result() {
+			result res;
+			res.type = RS_JGF;
+			res.ust = -1;
+			res.usm = -1;
+			return res;
+		}
+
+		static result from_file(const std::string &file_name) {
+			result res;
+			FILE *fres = fopen(file_name.c_str(), "r");
+			if (!fres) {
+				return result::failed_result();
+			}
+			int type;
+			if (fscanf(fres, "%d %d %d %d\n", &type, &res.ust, &res.usm, &res.exit_code) != 4) {
+				fclose(fres);
+				return result::failed_result();
+			}
+			res.type = (RS_TYPE)type;
+
+			int L = 1 << 15;
+			char buf[L];
+			while (!feof(fres)) {
+				int c = fread(buf, 1, L, fres);
+				res.extra.append(buf, c);
+				if (ferror(fres)) {
+					fclose(fres);
+					return result::failed_result();
+				}
+			}
+			fclose(fres);
+			return res;
+		}
+
+		[[noreturn]] void dump_and_exit() {
+			FILE *f;
+			if (result_file_name == "stdout") {
+				f = stdout;
+			} else if (result_file_name == "stderr") {
+				f = stderr;
+			} else {
+				f = fopen(result_file_name.c_str(), "w");
+			}
+			fprintf(f, "%d %d %d %d\n", this->type, this->ust, this->usm, this->exit_code);
+			fprintf(f, "%s\n", this->extra.c_str());
+			if (f != stdout && f != stderr) {
+				fclose(f);
+			}
+			exit(this->type == RS_JGF ? 1 : 0);
+		}
+	};
+
+	std::string result::result_file_name("stdout");
+
+	template <typename T1, typename T2>
+	inline std::ostream& add_runp_arg(std::ostream &out, const std::pair<T1, std::vector<T2>> &arg) {
+		for (const auto &t : arg.second) {
+			out << " --" << arg.first << "=" << escapeshellarg(t);
+		}
+		return out;
+	}
+	template <typename T1, typename T2>
+	inline std::ostream& add_runp_arg(std::ostream &out, const std::pair<T1, T2> &arg) {
+		return out << " --" << arg.first << "=" << escapeshellarg(arg.second);
+	}
+	inline std::ostream& add_runp_arg(std::ostream &out, const std::vector<std::string> &arg) {
+		for (const auto &t : arg) {
+			out << " " << escapeshellarg(t);
+		}
+		return out;
+	}
+	inline std::ostream& add_runp_arg(std::ostream &out, const std::string &arg) {
+		return out << " " << escapeshellarg(arg);
+	}
+
+	struct config {
+		std::vector<std::string> readable_file_names; // other than stdin
+		std::vector<std::string> writable_file_names; // other than stdout, stderr
+		std::string result_file_name;
+		std::string input_file_name;
+		std::string output_file_name;
+		std::string error_file_name = "/dev/null";
+		std::string type = "default";
+		std::string work_path;
+		limits_t limits;
+		std::string program_name;
+		std::vector<std::string> rest_args;
+
+		// full args (possbily with interpreter)
+		std::vector<std::string> full_args;
+
+		bool unsafe = false;
+		bool allow_proc = false;
+		bool need_show_trace_details = false;
+
+		config(std::string program_name = "", const std::vector<std::string> &rest_args = {})
+			: program_name(program_name), rest_args(rest_args) {
+		}
+
+		config &set_type(const std::string &type) {
+			this->type = type;
+			return *this;
+		}
+
+		std::string get_cmd() const {
+			std::ostringstream sout;
+			sout << escapeshellarg(run_path / "run_program");
+
+			if (this->need_show_trace_details) {
+				add_runp_arg(sout, "--show-trace-details");
+			}
+
+			add_runp_arg(sout, std::make_pair("res", this->result_file_name));
+			add_runp_arg(sout, std::make_pair("in", this->input_file_name));
+			add_runp_arg(sout, std::make_pair("out", this->output_file_name));
+			add_runp_arg(sout, std::make_pair("err", this->error_file_name));
+			add_runp_arg(sout, std::make_pair("type", this->type));
+
+			// limits
+			add_runp_arg(sout, std::make_pair("tl", this->limits.time));
+			add_runp_arg(sout, std::make_pair("ml", this->limits.memory));
+			add_runp_arg(sout, std::make_pair("ol", this->limits.output));
+			if (this->limits.real_time != -1) {
+				add_runp_arg(sout, std::make_pair("rtl", this->limits.real_time));
+			}
+			if (this->limits.stack != -1) {
+				add_runp_arg(sout, std::make_pair("sl", this->limits.stack));
+			}
+
+			if (this->unsafe) {
+				add_runp_arg(sout, "--unsafe");
+			}
+			if (this->allow_proc) {
+				add_runp_arg(sout, "--allow-proc");
+			}
+
+			if (!this->work_path.empty()) {
+				add_runp_arg(sout, std::make_pair("work-path", this->work_path));
+			}
+
+			add_runp_arg(sout, std::make_pair("add-readable", this->readable_file_names));
+			add_runp_arg(sout, std::make_pair("add-writable", this->writable_file_names));
+
+			add_runp_arg(sout, this->program_name);
+			add_runp_arg(sout, this->rest_args);
+
+			return sout.str();
+		}
+
+		void gen_full_args() {
+			// assume that current_path() == work_path
+
+			full_args.clear();
+			full_args.push_back(program_name);
+			full_args.insert(full_args.end(), rest_args.begin(),rest_args.end());
+
+			if (type == "java8" || type == "java11" || type == "java17") {
+				full_args[0] = get_class_name_from_file(fs::path(full_args[0]) / ".main_class_name");
+
+				std::string jdk;
+				if (type == "java8") {
+					jdk = UOJ_OPEN_JDK8;
+				} else if (type == "java11") {
+					jdk = UOJ_OPEN_JDK11;
+				} else { // if (type == "java17") {
+					jdk = UOJ_OPEN_JDK17;
+				}
+				full_args.insert(full_args.begin(), {
+					fs::canonical(fs::path(jdk) / "bin" / "java"), "-Xmx2048m", "-Xss1024m",
+					"-XX:ActiveProcessorCount=1",
+					"-classpath", program_name
+				});
+			} else if (type == "python2.7") {
+				full_args.insert(full_args.begin(), {
+					UOJ_PYTHON2_7, "-E", "-s", "-B"
+				});
+			} else if (type == "python3") {
+				full_args.insert(full_args.begin(), {
+					UOJ_PYTHON3, "-I", "-B"
+				});
+			}
+		}
+	};
+}
+
+namespace runp::interaction {
+	struct pipe_config {
+		int from, from_fd;
+		int to, to_fd;
+		std::string saving_file_name;
+
+		pipe_config() = default;
+		pipe_config(int _from, int _from_fd, int _to, int _to_fd, const std::string &_saving_file_name = "")
+				: from(_from), from_fd(_from_fd), to(_to), to_fd(_to_fd), saving_file_name(_saving_file_name) {}
+		pipe_config(const std::string &str) {
+			if (sscanf(str.c_str(), "%d:%d-%d:%d", &from, &from_fd, &to, &to_fd) != 4) {
+				throw std::invalid_argument("bad init str for pipe");
+			}
+		}
+	};
+
+	struct config {
+		std::vector<std::string> cmds;
+		std::vector<pipe_config> pipes;
+
+		std::string get_cmd() const {
+			std::ostringstream sout;
+			sout << escapeshellarg(run_path / "run_interaction");
+			for (auto &cmd : cmds) {
+				sout << " " << escapeshellarg(cmd);
+			}
+			for (auto &pipe : pipes) {
+				sout << " " << "-p";
+				sout << " " << pipe.from << ":" << pipe.from_fd;
+				sout << "-" << pipe.to << ":" << pipe.to_fd;
+
+				if (!pipe.saving_file_name.empty()) {
+					sout << " " << "-s";
+					sout << " " << escapeshellarg(pipe.saving_file_name);
+				}
+			}
+			return sout.str();
+		}
+	};
+
+	/*
+	 * @return interaction return value
+	 **/
+	int run(const config &ric) {
+		return execute(ric.get_cmd().c_str());
+	}
+}

judger/uoj_judger/include/uoj_secure.h

@@ -0,0 +1,332 @@
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <cstring>
+
+#ifdef _MSC_VER
+#   define UOJ_NORETURN __declspec(noreturn)
+#elif defined __GNUC__
+#   define UOJ_NORETURN __attribute__ ((noreturn))
+#else
+#   define UOJ_NORETURN
+#endif
+
+namespace {
+	typedef unsigned char u8;
+	typedef unsigned u32;
+	typedef unsigned long long u64;
+
+	using namespace std;
+
+	struct sha256_t {
+		u8 sum[32];
+
+		string to_str() {
+			return string((char*)sum, 32);
+		}
+	};
+
+	inline u32 uoj_sha2_rotr(u32 x, int n) {
+		return x >> n | x << (32 - n);
+	}
+
+	void uoj_sha256_chunk(u8 *chunk, u32 *hs) {
+		static const u32 k[] = {
+			0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
+			0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
+			0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+			0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
+			0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+			0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+			0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
+			0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+		};
+
+		u32 w[64];
+		for (int i = 0; i < 16; i++) {
+			w[i] =   ((u32) chunk[i << 2 | 3])
+				   | ((u32) chunk[i << 2 | 2] <<  8)
+				   | ((u32) chunk[i << 2 | 1] << 16)
+				   | ((u32) chunk[i << 2    ] << 24);
+		}
+
+		for (int i = 16; i < 64; i++) {
+			u32 s0 = uoj_sha2_rotr(w[i - 15], 7) ^ uoj_sha2_rotr(w[i - 15], 18) ^ (w[i - 15] >> 3);
+			u32 s1 = uoj_sha2_rotr(w[i - 2], 17) ^ uoj_sha2_rotr(w[i - 2], 19) ^ (w[i - 2] >> 10);
+			w[i] = w[i - 16] + s0 + w[i - 7] + s1;
+		}
+
+		u32 a = hs[0], b = hs[1], c = hs[2], d = hs[3], e = hs[4], f = hs[5], g = hs[6], h = hs[7];
+
+		for (int i = 0; i < 64; i++) {
+			u32 s1 = uoj_sha2_rotr(e, 6) ^ uoj_sha2_rotr(e, 11) ^ uoj_sha2_rotr(e, 25);
+			u32 ch = (e & f) ^ (~e & g);
+			u32 temp1 = h + s1 + ch + k[i] + w[i];
+			u32 s0 = uoj_sha2_rotr(a, 2) ^ uoj_sha2_rotr(a, 13) ^ uoj_sha2_rotr(a, 22);
+			u32 maj = (a & b) ^ (a & c) ^ (b & c);
+			u32 temp2 = s0 + maj;
+			h = g;
+			g = f;
+			f = e;
+			e = d + temp1;
+			d = c;
+			c = b;
+			b = a;
+			a = temp1 + temp2;
+		}
+
+		hs[0] += a, hs[1] += b, hs[2] += c, hs[3] += d, hs[4] += e, hs[5] += f, hs[6] += g, hs[7] += h;
+	}
+
+	sha256_t uoj_sha256(int n, u8 *m) {
+		u32 hs[] = {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
+
+		u64 len = n * 8;
+
+		int r_n = 0;
+		u8 r[128];
+		for (int i = 0; i < n; i += 64) {
+			if (i + 64 <= n) {
+				uoj_sha256_chunk(m + i, hs);
+			} else {
+				for (int j = i; j < n; j++) {
+					r[r_n++] = m[j];
+				}
+			}
+		}
+
+		r[r_n++] = 0x80;
+		while ((r_n + 8) % 64 != 0) {
+			r[r_n++] = 0;
+		}
+		for (int i = 1; i <= 8; i++) {
+			r[r_n++] = len >> (64 - i * 8);
+		}
+
+		for (int i = 0; i < r_n; i += 64) {
+			uoj_sha256_chunk(r + i, hs);
+		}
+
+		sha256_t sum;
+		for (int i = 0; i < 8; i++) {
+			for (int j = 0; j < 4; j++) {
+				sum.sum[i << 2 | j] = hs[i] >> (32 - (j + 1) * 8);
+			}
+		}
+		return sum;
+	}
+	sha256_t uoj_sha256(const string &m) {
+		return uoj_sha256((int)m.length(), (u8*)m.data());
+	}
+
+	sha256_t uoj_hmac(const string &k, const string &m) {
+		string ki = k, ko = k;
+		for (int i = 0; i < (int)k.length(); i++) {
+			ki[i] ^= 0x36;
+			ko[i] ^= 0x5c;
+		}
+		return uoj_sha256(ko + uoj_sha256(ki + m).to_str());
+	}
+
+	class uoj_mt_rand_engine {
+		static const int N = 312;
+		static const int M = 156;
+		static const int R = 31;
+		static const u64 LM = (1llu << R) - 1;
+		static const u64 UM = ~LM;
+		static const u64 F = 6364136223846793005llu;
+
+		u64 mt[N];
+		int index;
+
+		void init(u64 seed) {
+			index = N;
+			mt[0] = seed;
+			for (int i = 1; i < N; i++) {
+				mt[i] = F * (mt[i - 1] ^ (mt[i - 1] >> 62)) + i;
+			}
+		}
+
+		void twist() {
+			for (int i = 0; i < N; i++) {
+				u64 x = (mt[i] & UM) + (mt[(i + 1) % N] & LM);
+				u64 xA = x >> 1;
+				if (x & 1) {
+					xA ^= 0xb5026f5aa96619e9llu;
+				}
+				mt[i] = mt[(i + M) % N] ^ xA;
+			}
+			index = 0;
+		}
+
+	public:
+		uoj_mt_rand_engine(u64 seed) {
+			init(seed);
+		}
+		uoj_mt_rand_engine(const string &s) {
+			sha256_t sum = uoj_sha256(s);
+
+			u64 seed = 0;
+			for (int i = 0; i < 8; i++)
+				seed = seed << 8 | sum.sum[i];
+
+			init(seed);
+		}
+
+		u64 next() {
+			if (index >= N) {
+				twist();
+			}
+
+			u64 y = mt[index];
+			y ^= (y >> 29) & 0x5555555555555555llu;
+			y ^= (y << 17) & 0x71d67fffeda60000llu;
+			y ^= (y << 37) & 0xfff7eee000000000llu;
+			y ^= y >> 43;
+
+			index++;
+
+			return y;
+		}
+
+		string randstr(int n, string charset="0123456789abcdefghijklmnopqrstuvwxyz") {
+			string s;
+			for (int i = 0; i < n; i++) {
+				s += charset[next() % charset.length()];
+			}
+			return s;
+		}
+	};
+
+	class uoj_cipher {
+		string key;
+	
+	public:
+		uoj_cipher() {}
+		uoj_cipher(const string &_key) : key(_key) {}
+
+		void set_key(const string &_key) {
+			key = _key;
+		}
+
+		void encrypt(string &m) {
+			uoj_mt_rand_engine rnd(key);
+
+			string hmac = uoj_hmac(key, m).to_str();
+
+			m.push_back(0x80);
+			while ((m.length() + 32) % 512 != 0) {
+				m.push_back(0x00);
+			}
+
+			m += hmac;
+			for (int i = 0; i < (int)m.length(); i += 8) {
+				u64 r = rnd.next();
+				for (int j = i; j < i + 4; j++) {
+					m[j] = (u8)m[j] ^ (u8)r;
+					r >>= 16;
+				}
+			}
+		}
+		bool decrypt(string &m) {
+			uoj_mt_rand_engine rnd(key);
+
+			if (m.empty() || m.length() % 512 != 0) {
+				return false;
+			}
+			for (int i = 0; i < (int)m.length(); i += 8) {
+				u64 r = rnd.next();
+				for (int j = i; j < i + 4; j++) {
+					m[j] = (u8)m[j] ^ (u8)r;
+					r >>= 16;
+				}
+			}
+			string hmac = m.substr(m.length() - 32);
+			int len = m.length() - 33;
+			while (len >= 0 && (u8)m[len] != 0x80) {
+				len--;
+			}
+			if (len < 0) {
+				return false;
+			}
+			m.resize(len);
+			if (uoj_hmac(key, m).to_str() != hmac) {
+				return false;
+			}
+			return true;
+		}
+	};
+
+
+	class uoj_secure_io {
+		FILE fake_f, true_outf;
+		string input_m;
+
+		string key;
+		uoj_cipher cipher;
+
+	public:
+		istringstream in;
+		ostringstream out;
+
+		uoj_secure_io() {
+			srand(time(NULL));
+
+			const int BUFFER_SIZE = 1024;
+			u8 buffer[BUFFER_SIZE + 1];
+			while (!feof(stdin)) {
+				int ret = fread(buffer, 1, BUFFER_SIZE, stdin);
+				if (ret < 0) {
+					break;
+				}
+				input_m.append((char *)buffer, ret);
+			}
+			fclose(stdin);
+
+			for (int i = 0; i < (int)sizeof(fake_f); i++)
+				((u8*)&fake_f)[i] = rand();
+
+			memcpy(&true_outf, stdout, sizeof(FILE));
+			memcpy(stdout, &fake_f, sizeof(FILE));
+		}
+
+		void init_with_key(const string &_key) {
+			cerr.tie(NULL);
+
+			key = _key;
+			cipher.set_key(key);
+
+			if (!cipher.decrypt(input_m)) {
+				end("Unauthorized input");
+			}
+
+			in.str(input_m);
+		}
+
+		string input() {
+			return input_m;
+		}
+
+		UOJ_NORETURN void end(string m) {
+			memcpy(stdout, &true_outf, sizeof(FILE));
+
+			if (!out.str().empty()) {
+				if (m.empty()) {
+					m = out.str();
+				} else {
+					m = out.str() + m;
+				}
+			}
+
+			cipher.encrypt(m);
+			fwrite(m.data(), 1, m.length(), stdout);
+
+			fclose(stdout);
+			exit(0);
+		}
+
+		UOJ_NORETURN void end() {
+			end("");
+		}
+	};
+}

judger/uoj_judger/main_judger.cpp

@@ -1,22 +1,20 @@
-#include "uoj_judger.h"
+#include "uoj_judger_v2.h"
 
 int main(int argc, char **argv)  {
 	main_judger_init(argc, argv);
-	RunResult res = run_program(
+
-			(result_path + "/run_judger_result.txt").c_str(),
+	runp::config rpc(conf_str("judger"), {
-			"/dev/null",
+		main_path, work_path, result_path, data_path
-			"/dev/null",
+	});
-			"stderr",
+	rpc.result_file_name = result_path / "run_judger_result.txt";
-			conf_run_limit("judger", 0, RL_JUDGER_DEFAULT),
+	rpc.input_file_name = "/dev/null";
-			"--unsafe",
+	rpc.output_file_name = "/dev/null";
-			conf_str("judger").c_str(),
+	rpc.error_file_name = "stderr";
-			main_path.c_str(),
+	rpc.limits = conf_run_limit("judger", 0, RL_JUDGER_DEFAULT);
-			work_path.c_str(),
+	rpc.unsafe = true;
-			result_path.c_str(),
+	runp::result res = runp::run(rpc);
-			data_path.c_str(),
+	if (res.type != runp::RS_AC) {
-			NULL);
+		end_judge_judgment_failed("Judgment Failed : Judger " + runp::rstype_str(res.type));
-	if (res.type != RS_AC) {
-		end_judge_judgement_failed("Judgement Failed : Judger " + info_str(res));
 	}
 	return 0;
 }

judger/uoj_judger/run/compile.cpp

@@ -0,0 +1,493 @@
+#include <iostream>
+#include <cstdio>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <vector>
+#include <map>
+#include <utility>
+#include <stdexcept>
+#include <argp.h>
+
+#include "uoj_run.h"
+
+namespace fs = std::filesystem;
+
+class language_not_supported_error : public std::invalid_argument {
+public:
+    explicit language_not_supported_error()
+        : std::invalid_argument("This language has not been supported yet.") {}
+};
+
+class fail_to_read_src_error : public std::runtime_error {
+public:
+    explicit fail_to_read_src_error(const std::string &what = "An error occurs when trying to read the source code.")
+        : std::runtime_error(what) {}
+};
+
+class compile_error : public std::invalid_argument {
+public:
+    explicit compile_error(const std::string &what)
+        : std::invalid_argument(what) {}
+};
+
+const std::vector<std::pair<const char *, const char *>> suffix_search_list = {
+    {".code"  , ""         },
+    {"20.cpp" , "C++20"    },
+    {"17.cpp" , "C++17"    },
+    {"14.cpp" , "C++14"    },
+    {"11.cpp" , "C++11"    },
+    {".cpp"   , "C++"    },
+    {".c"     , "C"        },
+    {".pas"   , "Pascal"   },
+    {"2.7.py" , "Python2.7"},
+    {".py"    , "Python3"  },
+    {"7.java" , "Java7"    },
+    {"8.java" , "Java8"    },
+    {"11.java", "Java11"   },
+    {"14.java", "Java14"   },
+    {"17.java", "Java17"   },
+};
+
+struct compile_config {
+    std::string name;
+    std::string src;
+    std::string lang = "auto";
+    std::string opt;
+    std::string implementer;
+    std::string custom_compiler_path;
+    std::vector<std::string> cinclude_dirs;
+
+    void auto_find_src() {
+        if (!src.empty()) {
+            return;
+        }
+        for (auto &p : suffix_search_list) {
+            if (fs::is_regular_file(name + p.first)) {
+                src = fs::canonical(name + p.first);
+                if (lang == "auto") {
+                    lang = p.second;
+                }
+                return;
+            }
+        }
+    }
+};
+
+error_t compile_argp_parse_opt(int key, char *arg, struct argp_state *state) {
+    compile_config *config = (compile_config*)state->input;
+
+	try {
+		switch (key) {
+        case 's':
+            config->src = arg;
+            break;
+        case 'i':
+            config->implementer = arg;
+            break;
+        case 'l':
+            config->lang = arg;
+            break;
+        case 'c':
+            config->custom_compiler_path = arg;
+            break;
+        case 'I':
+            config->cinclude_dirs.push_back(arg);
+            break;
+        case ARGP_KEY_ARG:
+            config->name = arg;
+            break;
+        case ARGP_KEY_END:
+            if (state->arg_num != 1) {
+                argp_usage(state);
+            }
+            break;
+        default:
+            return ARGP_ERR_UNKNOWN;
+		}
+	} catch (std::exception &e) {
+		argp_usage(state);
+	}
+
+	return 0;
+}
+
+compile_config parse_args(int argc, char **argv) {
+	argp_option argp_options[] = {
+		{"src"     , 's',  "SOURCE_CODE"  , 0, "set the path to source code"                                ,  1},
+		{"impl"    , 'i',  "IMPLEMENTER"  , 0, "set the implementer name"                                   ,  2},
+		{"lang"    , 'l',  "LANGUAGE"     , 0, "set the language"                                           ,  3},
+		{"custom"  , 'c',  "CUSTOM"       , 0, "path to custom compilers (those are not placed in /usr/bin)",  4},
+        {"cinclude", 'I',  "DIRECTORY"    , 0, "add the directory dir to the list of directories to be searched for header files during preprocessing (for C/C++)", 5},
+		{0}
+	};
+	char argp_args_doc[] = "name";
+	char argp_doc[] = "compile: a tool to compile programs";
+
+	argp compile_argp = {
+		argp_options,
+		compile_argp_parse_opt,
+		argp_args_doc,
+		argp_doc
+	};
+
+	compile_config config;
+	argp_parse(&compile_argp, argc, argv, ARGP_NO_ARGS | ARGP_IN_ORDER, 0, &config);
+
+    config.auto_find_src();
+    if (config.src.empty() || !fs::is_regular_file(config.src)) {
+        throw fail_to_read_src_error();
+    }
+
+	return config;
+}
+
+bool is_illegal_keyword(const std::string &name) {
+	return name == "__asm" || name == "__asm__" || name == "asm";
+}
+
+bool has_illegal_keywords_in_file(const std::string &src) {
+    std::ifstream fin(src);
+    if (!fin) {
+        throw fail_to_read_src_error();
+    }
+
+    const int L = 1 << 15;
+    char buf[L];
+    std::string key;
+
+    while (!fin.eof()) {
+        fin.read(buf, L);
+        int cnt = fin.gcount();
+        for (char *p = buf; p != buf + cnt; p++) {
+            char c = *p;
+            if (isalnum(c) || c == '_') {
+                if (key.size() < 20) {
+                    key += c;
+                } else {
+                    if (is_illegal_keyword(key)) {
+                        return true;
+                    }
+                    key.erase(key.begin());
+                    key += c;
+                }
+            }
+            else {
+                if (is_illegal_keyword(key)) {
+                    return true;
+                }
+                key.clear();
+            }
+        }
+        if (fin.bad()) {
+            throw fail_to_read_src_error();
+        }
+    }
+	return false;
+}
+
+std::string get_java_main_class(const std::string &src) {
+    std::ifstream fin(src);
+    if (!fin) {
+        throw fail_to_read_src_error();
+    }
+
+	const int L = 1 << 15;
+	char buf[L];
+	std::string s;
+
+	int mode = 0;
+
+	while (!fin.eof()) {
+        fin.read(buf, L);
+        int cnt = fin.gcount();
+		for (char *p = buf; p != buf + cnt; p++) {
+			s += *p;
+			switch (mode) {
+            case 0:
+                switch (*p) {
+                case '/':
+                    mode = 1;
+                    break;
+                case '\'':
+                    mode = 5;
+                    break;
+                case '\"':
+                    mode = 6;
+                    break;
+                }
+                break;
+            case 1:
+                switch (*p) {
+                case '/':
+                    mode = 2;
+                    s.pop_back();
+                    s.pop_back();
+                    break;
+                case '*':
+                    mode = 3;
+                    s.pop_back();
+                    s.pop_back();
+                    break;
+                }
+                break;
+            case 2:
+                s.pop_back();
+                switch (*p) {
+                case '\n':
+                    s += '\n';
+                    mode = 0;
+                    break;
+                }
+                break;
+            case 3:
+                s.pop_back();
+                switch (*p) {
+                case '*':
+                    mode = 4;
+                    break;
+                }
+                break;
+            case 4:
+                s.pop_back();
+                switch (*p) {
+                case '/':
+                    s += ' ';
+                    mode = 0;
+                    break;
+                }
+                break;
+            case 5:
+                switch (*p) {
+                case '\'':
+                    mode = 0;
+                    break;
+                case '\\':
+                    mode = 7;
+                    break;
+                }
+            case 6:
+                switch (*p) {
+                case '\"':
+                    mode = 0;
+                    break;
+                case '\\':
+                    mode = 8;
+                    break;
+                }
+            case 7:
+                mode = 5;
+                break;
+            case 8:
+                mode = 6;
+                break;
+			}
+		}
+        if (fin.bad()) {
+            throw fail_to_read_src_error();
+        }
+	}
+
+	bool valid[256];
+	std::fill(valid, valid + 256, false);
+    std::fill(valid + 'a', valid + 'z' + 1, true);
+    std::fill(valid + 'A', valid + 'Z' + 1, true);
+    std::fill(valid + '0', valid + '9' + 1, true);
+	valid['.'] = true;
+	valid['_'] = true;
+
+	std::vector<std::string> tokens;
+	for (size_t p = 0, np = 0; p < s.length(); p = np) {
+		while (np < s.length() && valid[(unsigned char)s[np]]) {
+			np++;
+		}
+		if (np == p) {
+			np++;
+		} else {
+			tokens.push_back(s.substr(p, np - p));
+		}
+	}
+	if (tokens.size() > 0 && tokens[0] == "package") {
+        throw compile_error("Please don't specify the package.");
+	}
+
+	for (size_t i = 0; i + 1 < tokens.size(); i++) {
+		if (tokens[i] == "class") {
+            std::string name = tokens[i + 1];
+			if (name.length() > 100) {
+                throw compile_error("The name of the main class is too long.");
+            }
+            for (size_t k = 0; k < name.length(); k++) {
+                if (!isalnum(name[k]) && name[k] != '_') {
+                    throw compile_error("The name of the main class should only contain letters, numbers and underscore sign.");
+                }
+            }
+            if (!isalpha(name[0])) {
+                throw compile_error("The name of the main class cannot begin with a number.");
+            }
+            return tokens[i + 1];
+		}
+	}
+
+    throw compile_error("Cannot find the main class.");
+}
+
+int compile_cpp(const compile_config &conf, const std::string &std) {
+    std::ostringstream sflags;
+    spaced_out(sflags, "-lm", "-O2", "-DONLINE_JUDGE", "-std=" + std);
+    for (auto dir : conf.cinclude_dirs) {
+        add_spaced_out(sflags, "-I" + dir);
+    }
+
+    if (conf.implementer.empty()) {
+        return execute(
+            UOJ_GPLUSPLUS, sflags.str(), "-o", conf.name,
+            "-x", "c++", conf.src
+        );
+    } else {
+        return execute(
+            UOJ_GPLUSPLUS, sflags.str(), "-o", conf.name,
+            conf.implementer + ".cpp", "-x", "c++", conf.src
+        );
+    }
+}
+int compile_c(const compile_config &conf) {
+    std::ostringstream sflags;
+    spaced_out(sflags, "-lm", "-O2", "-DONLINE_JUDGE");
+    for (auto dir : conf.cinclude_dirs) {
+        add_spaced_out(sflags, "-I" + dir);
+    }
+
+    if (conf.implementer.empty()) {
+        return execute(
+            UOJ_GCC, sflags.str(), "-o", conf.name,
+            "-x", "c", conf.src
+        );
+    } else {
+        return execute(
+            UOJ_GCC, sflags.str(), "-o", conf.name,
+            conf.implementer + ".c", "-x", "c", conf.src
+        );
+    }
+}
+int compile_python2_7(const compile_config &conf) {
+    if (!conf.implementer.empty()) {
+        throw language_not_supported_error();
+    }
+
+    std::string dfile = "__pycode__/" + conf.name + ".py";
+	std::string compiler_code =
+		"import py_compile\n"
+		"import sys\n"
+		"try:\n"
+		"    py_compile.compile('" + conf.src + "', cfile='" + conf.name + "', dfile='" + dfile + "', doraise=True)\n"
+		"    sys.exit(0)\n"
+		"except Exception as e:\n"
+		"    print e\n"
+		"    sys.exit(1)\n";
+	return execute(UOJ_PYTHON2_7, "-E", "-s", "-B", "-O", "-c", escapeshellarg(compiler_code));
+}
+int compile_python3(const compile_config &conf) {
+    if (!conf.implementer.empty()) {
+        throw language_not_supported_error();
+    }
+    std::string dfile = "__pycode__/" + conf.name + ".py";
+	std::string compiler_code =
+		"import py_compile\n"
+		"import sys\n"
+		"try:\n"
+		"    py_compile.compile('" + conf.src + "', cfile='" + conf.name + "', dfile='" + dfile + "', doraise=True)\n"
+		"    sys.exit(0)\n"
+		"except Exception as e:\n"
+		"    print(e)\n"
+		"    sys.exit(1)\n";
+	return execute(UOJ_PYTHON3, "-I", "-B", "-O", "-c", escapeshellarg(compiler_code));
+}
+int compile_java(const compile_config &conf, const std::string &jdk) {
+    if (!conf.implementer.empty()) {
+        throw language_not_supported_error();
+    }
+
+    try {
+        std::string main_class = get_java_main_class(conf.src);
+        fs::remove_all(conf.name);
+        fs::create_directory(conf.name);
+        fs::copy_file(conf.src, fs::path(conf.name) / (main_class + ".java"));
+        int ret = execute(
+            "cd", conf.name,
+            "&&", jdk + "/bin/javac", main_class + ".java"
+        );
+        fs::remove(fs::path(conf.name) / (main_class + ".java"));
+        put_class_name_to_file(fs::path(conf.name) / ".main_class_name", main_class);
+        return ret;
+    } catch (std::system_error &e) {
+        throw compile_error("System Error");
+    }
+}
+int compile_pas(const compile_config &conf) {
+    if (conf.implementer.empty()) {
+        return execute(UOJ_FPC, conf.src, "-O2");
+    } else {
+        try {
+            std::string unit_name = get_class_name_from_file(conf.name + ".unit_name");
+            if (!unit_name.empty()) {
+                fs::copy_file(conf.src, unit_name + ".pas");
+            }
+            int ret = execute(UOJ_FPC, conf.implementer + ".pas", "-o" + conf.name, "-O2");
+            if (!unit_name.empty()) {
+                fs::remove(unit_name + ".pas");
+            }
+            return ret;
+        } catch (std::system_error &e) {
+            throw compile_error("System Error");
+        }
+    }
+}
+
+int compile(const compile_config &conf) {
+	if ((conf.lang.length() > 0 && conf.lang[0] == 'C') && has_illegal_keywords_in_file(conf.src)) {
+        std::cerr << "Compile Failed: assembly language detected" << std::endl;
+        return 1;
+	}
+
+    std::string lang = upgraded_lang(conf.lang);
+
+    if (lang == "C++" || lang == "C++14") {
+        return compile_cpp(conf, "c++14");
+    } else if (lang == "C++98") {
+        return compile_cpp(conf, "c++98");
+    } else if (lang == "C++03") {
+        return compile_cpp(conf, "c++03");
+    } else if (lang == "C++11") {
+        return compile_cpp(conf, "c++11");
+    } else if (lang == "C++17") {
+        return compile_cpp(conf, "c++17");
+    } else if (lang == "C++20") {
+        return compile_cpp(conf, "c++20");
+    } else if (lang == "C") {
+        return compile_c(conf);
+    } else if (lang == "Python2.7") {
+        return compile_python2_7(conf);
+    } else if (lang == "Python3") {
+        return compile_python3(conf);
+    } else if (lang == "Java8") {
+        return compile_java(conf, UOJ_OPEN_JDK8);
+    } else if (lang == "Java11") {
+        return compile_java(conf, UOJ_OPEN_JDK11);
+    } else if (lang == "Java17") {
+        return compile_java(conf, UOJ_OPEN_JDK17);
+    } else if (lang == "Pascal") {
+        return compile_pas(conf);
+    } else {
+        throw language_not_supported_error();
+    }
+}
+
+int main(int argc, char **argv) {
+    try {
+        return compile(parse_args(argc, argv));
+    } catch (std::exception &e) {
+        std::cerr << e.what() << std::endl;
+        return 1;
+    }
+}

judger/uoj_judger/run/run_interaction.cpp

@@ -16,62 +16,38 @@
 #include <vector>
 #include <set>
 #include <argp.h>
-#include "uoj_env.h"
+#include "uoj_run.h"
+
 using namespace std;
 
-struct RunResult {
+struct run_cmd_data {
-	int result;
-	int ust;
-	int usm;
-	int exit_code;
-
-	RunResult(int _result, int _ust = -1, int _usm = -1, int _exit_code = -1)
-			: result(_result), ust(_ust), usm(_usm), exit_code(_exit_code) {
-		if (result != RS_AC) {
-			ust = -1, usm = -1;
-		}
-	}
-};
-
-struct PipeConfig {
-	int from, to;
-	int from_fd, to_fd;
-
-	string saving_file_name; // empty for none
-
-	PipeConfig() {
-	}
-	PipeConfig(string str) {
-		if (sscanf(str.c_str(), "%d:%d-%d:%d", &from, &from_fd, &to, &to_fd) != 4) {
-			throw invalid_argument("bad init str for PipeConfig");
-		}
-		from -= 1;
-		to -= 1;
-	}
-};
-
-struct RunInteractionConfig {
-	vector<string> cmds;
-	vector<PipeConfig> pipes;
-};
-
-struct RunCmdData {
 	string cmd;
 	pid_t pid;
 
 	vector<int> ipipes, opipes;
 };
-struct PipeData {
+struct pipe_data {
-	PipeConfig config;
+	runp::interaction::pipe_config config;
 	int ipipefd[2], opipefd[2];
 	thread io_thread;
 	exception_ptr eptr;
 };
 
-class RunInteraction {
+void write_all_or_throw(int fd, char *buf, int n) {
+	int wcnt = 0;
+	while (wcnt < n) {
+		int ret = write(fd, buf + wcnt, n - wcnt);
+		if (ret == -1) {
+			throw system_error(errno, system_category());
+		}
+		wcnt += ret;
+	}
+}
+
+class interaction_runner {
 private:
-	vector<RunCmdData> cmds;
+	vector<run_cmd_data> cmds;
-	vector<PipeData> pipes;
+	vector<pipe_data> pipes;
 
 	void prepare_fd() { // me
 		for (int i = 0; i < (int)pipes.size(); i++) {
@@ -80,15 +56,21 @@ private:
 		}
 	}
 	void prepare_fd_for_cmd(int id) {
-		freopen("/dev/null", "r", stdin);
+		if (freopen("/dev/null", "r", stdin) == NULL) {
-		freopen("/dev/null", "w", stdout);
+			throw system_error(errno, system_category());
-		freopen("/dev/null", "w", stderr);
+		}
+		if (freopen("/dev/null", "w", stdout) == NULL) {
+			throw system_error(errno, system_category());
+		}
+		if (freopen("/dev/null", "w", stderr) == NULL) {
+			throw system_error(errno, system_category());
+		}
 
 		for (int i = 0; i < (int)pipes.size(); i++) {
-			if (pipes[i].config.from == id) {
+			if (pipes[i].config.from - 1 == id) {
 				dup2(pipes[i].ipipefd[1], 128 + pipes[i].ipipefd[1]);
 			}
-			if (pipes[i].config.to == id) {
+			if (pipes[i].config.to - 1 == id) {
 				dup2(pipes[i].opipefd[0], 128 + pipes[i].opipefd[0]);
 			}
 			close(pipes[i].ipipefd[0]);
@@ -97,11 +79,11 @@ private:
 			close(pipes[i].opipefd[1]);
 		}
 		for (int i = 0; i < (int)pipes.size(); i++) {
-			if (pipes[i].config.from == id) {
+			if (pipes[i].config.from - 1 == id) {
 				dup2(128 + pipes[i].ipipefd[1], pipes[i].config.from_fd);
 				close(128 + pipes[i].ipipefd[1]);
 			}
-			if (pipes[i].config.to == id) {
+			if (pipes[i].config.to - 1 == id) {
 				dup2(128 + pipes[i].opipefd[0], pipes[i].config.to_fd);
 				close(128 + pipes[i].opipefd[0]);
 			}
@@ -109,38 +91,54 @@ private:
 	}
 
 	void wait_pipe_io(int pipe_id) {
-		FILE *sf = NULL;
+		FILE *sf = nullptr;
-		if (!pipes[pipe_id].config.saving_file_name.empty())
+		if (!pipes[pipe_id].config.saving_file_name.empty()) {
 			sf = fopen(pipes[pipe_id].config.saving_file_name.c_str(), "w");
-
+		}
 		int ifd = pipes[pipe_id].ipipefd[0];
 		int ofd = pipes[pipe_id].opipefd[1];
+		int sfd = sf ? fileno(sf) : -1;
 
-		FILE *inf = fdopen(ifd, "r");
+		int iflags = fcntl(ifd, F_GETFL);
-		FILE *ouf = fdopen(ofd, "w");
+
+		const int L = 4096;
+		char buf[L];
+
+		int sbuf_len = 0;
+		char sbuf[L * 2];
 
 		try {
 			pipes[pipe_id].eptr = nullptr;
 
-			const int L = 4096;
-			char buf[L];
-
 			while (true) {
-				int c = fgetc(inf);
+				int cnt1 = read(ifd, buf, 1);
-				if (c == EOF) {
+				if (cnt1 == -1) {
-					if (errno) {
+					throw system_error(errno, system_category());
-						throw system_error(errno, system_category());
+				}
-					}
+				if (cnt1 == 0) {
 					break;
 				}
 
-				if (fputc(c, ouf) == EOF) {
+				fcntl(ifd, F_SETFL, iflags | O_NONBLOCK);
-					throw system_error(errno, system_category());
+				int cnt2 = read(ifd, buf + 1, L - 1);
-				}
+				fcntl(ifd, F_SETFL, iflags);
-				fflush(ouf);
 
-				if (fputc(c, sf) == EOF) {
+				if (cnt2 == -1) {
-					throw system_error(errno, system_category());
+					if (errno != EAGAIN) {
+						throw system_error(errno, system_category());
+					}
+					cnt2 = 0;
+				}
+
+				write_all_or_throw(ofd, buf, cnt2 + 1);
+
+				if (sf) {
+					memcpy(sbuf + sbuf_len, buf, cnt2 + 1);
+					sbuf_len += cnt2 + 1;
+					if (sbuf_len > L) {
+						write_all_or_throw(sfd, sbuf, sbuf_len);
+						sbuf_len = 0;
+					}
 				}
 			}
 		} catch (exception &e) {
@@ -148,12 +146,19 @@ private:
 			pipes[pipe_id].eptr = current_exception();
 		}
 
-		fclose(sf);
+		if (sf) {
-		fclose(inf);
+			if (sbuf_len > 0) {
-		fclose(ouf);
+				write_all_or_throw(sfd, sbuf, sbuf_len);
+				sbuf_len = 0;
+			}
+			fclose(sf);
+		}
+
+		close(ifd);
+		close(ofd);
 	}
 public:
-	RunInteraction(const RunInteractionConfig &config) {
+	interaction_runner(const runp::interaction::config &config) {
 		cmds.resize(config.cmds.size());
 		for (int i = 0; i < (int)config.cmds.size(); i++) {
 			cmds[i].cmd = config.cmds[i];
@@ -162,8 +167,8 @@ public:
 		pipes.resize(config.pipes.size());
 		for (int i = 0; i < (int)config.pipes.size(); i++) {
 			pipes[i].config = config.pipes[i];
-			cmds[pipes[i].config.from].opipes.push_back(i);
+			cmds[pipes[i].config.from - 1].opipes.push_back(i);
-			cmds[pipes[i].config.to].ipipes.push_back(i);
+			cmds[pipes[i].config.to - 1].ipipes.push_back(i);
 		}
 
 		for (int i = 0; i < (int)pipes.size(); i++) {
@@ -175,8 +180,8 @@ public:
 			cmds[i].pid = fork();
 			if (cmds[i].pid == 0) {
 				prepare_fd_for_cmd(i);
-				system(cmds[i].cmd.c_str());
+				execl("/bin/sh", "sh", "-c", cmds[i].cmd.c_str(), NULL);
-				exit(0);
+				exit(1); // exec failed, exit 1
 			} else if (cmds[i].pid == -1) {
 				throw system_error(errno, system_category());
 			}
@@ -184,7 +189,7 @@ public:
 		
 		prepare_fd();
 		for (int i = 0; i < (int)pipes.size(); i++) {
-			pipes[i].io_thread = thread(&RunInteraction::wait_pipe_io, this, i);
+			pipes[i].io_thread = thread(&interaction_runner::wait_pipe_io, this, i);
 		}
 	}
 
@@ -199,12 +204,12 @@ public:
 };
 
 error_t run_interaction_argp_parse_opt (int key, char *arg, struct argp_state *state) {
-	RunInteractionConfig *config = (RunInteractionConfig*)state->input;
+	runp::interaction::config *config = (runp::interaction::config*)state->input;
 
 	try {
 		switch (key) {
 			case 'p':
-				config->pipes.push_back(PipeConfig(arg));
+				config->pipes.push_back(runp::interaction::pipe_config(arg));
 				break;
 			case 's':
 				if (config->pipes.empty()) {
@@ -230,7 +235,7 @@ error_t run_interaction_argp_parse_opt (int key, char *arg, struct argp_state *s
 	return 0;
 }
 
-RunInteractionConfig parse_args(int argc, char **argv) {
+runp::interaction::config parse_args(int argc, char **argv) {
 	argp_option run_interaction_argp_options[] = {
 		{"add-pipe"           , 'p', "PIPE"        , 0, "Add a pipe <from>:<fd>-<to>:<fd> (fd < 128)"           ,  1},
 		{"save-pipe"          , 's', "FILE"        , 0, "Set last pipe saving file"                             ,  2},
@@ -246,7 +251,7 @@ RunInteractionConfig parse_args(int argc, char **argv) {
 		run_interaction_argp_doc
 	};
 
-	RunInteractionConfig config;
+	runp::interaction::config config;
 
 	argp_parse(&run_interaction_argp, argc, argv, ARGP_NO_ARGS | ARGP_IN_ORDER, 0, &config);
 
@@ -256,7 +261,7 @@ RunInteractionConfig parse_args(int argc, char **argv) {
 int main(int argc, char **argv) {
 	signal(SIGPIPE, SIG_IGN);
 
-	RunInteraction ri(parse_args(argc, argv));
+	interaction_runner ri(parse_args(argc, argv));
 	ri.join();
 
 	return 0;

judger/uoj_judger/run/run_program.cpp

@@ -1,86 +1,31 @@
-#include <iostream>
+#include "run_program_sandbox.h"
-#include <cstdio>
-#include <cstdlib>
-#include <unistd.h>
-#include <asm/unistd.h>
-#include <sys/ptrace.h>
-#include <sys/wait.h>
-#include <sys/resource.h>
-#include <sys/user.h>
-#include <fcntl.h>
-#include <cstring>
-#include <string>
-#include <vector>
-#include <set>
-#include <argp.h>
-#include "uoj_env.h"
-using namespace std;
 
-struct RunResult {
+enum RUN_EVENT_TYPE {
-	int result;
+	ET_SKIP,
-	int ust;
+	ET_EXIT,
-	int usm;
+	ET_SIGNALED,
-	int exit_code;
+	ET_REAL_TLE,
-
+	ET_USER_CPU_TLE,
-	RunResult(int _result, int _ust = -1, int _usm = -1, int _exit_code = -1)
+	ET_MLE,
-			: result(_result), ust(_ust), usm(_usm), exit_code(_exit_code) {
+	ET_OLE,
-		if (result != RS_AC) {
+	ET_SECCOMP_STOP,
-			ust = -1, usm = -1;
+	ET_SIGNAL_DELIVERY_STOP,
-		}
+	ET_RESTART,
-	}
 };
 
-struct RunProgramConfig
+struct run_event {
-{
+	RUN_EVENT_TYPE type;
-	int time_limit;
+	int pid = -1;
-	int real_time_limit;
+	rp_child_proc *cp;
-	int memory_limit;
-	int output_limit;
-	int stack_limit;
-	string input_file_name;
-	string output_file_name;
-	string error_file_name;
-	string result_file_name;
-	string work_path;
-	string type;
-	vector<string> extra_readable_files;
-	vector<string> extra_writable_files;
-	bool allow_proc;
-	bool safe_mode;
-	bool need_show_trace_details;
 
-	string program_name;
+	int sig = 0;
-	string program_basename;
+	int exitcode = 0;
-	vector<string> argv;
+	int pevent = 0;
 
+	int usertim = 0, usermem = 0;
 };
 
-int put_result(string result_file_name, RunResult res) {
+argp_option run_program_argp_options[] = {
-	FILE *f;
-	if (result_file_name == "stdout") {
-		f = stdout;
-	} else if (result_file_name == "stderr") {
-		f = stderr;
-	} else {
-		f = fopen(result_file_name.c_str(), "w");
-	}
-	fprintf(f, "%d %d %d %d\n", res.result, res.ust, res.usm, res.exit_code);
-	if (f != stdout && f != stderr) {
-		fclose(f);
-	}
-	if (res.result == RS_JGF) {
-		return 1;
-	} else {
-		return 0;
-	}
-}
-
-char self_path[PATH_MAX + 1] = {};
-
-#include "run_program_conf.h"
-
-argp_option run_program_argp_options[] =
-{
 	{"tl"                 , 'T', "TIME_LIMIT"  , 0, "Set time limit (in second)"                            ,  1},
 	{"rtl"                , 'R', "TIME_LIMIT"  , 0, "Set real time limit (in second)"                       ,  2},
 	{"ml"                 , 'M', "MEMORY_LIMIT", 0, "Set memory limit (in mb)"                              ,  3},
@@ -101,26 +46,24 @@ argp_option run_program_argp_options[] =
 	{"add-writable-raw"   , 506, "FILE"        , 0, "Add a writable (don't transform to its real path)"     , 15},
 	{0}
 };
-error_t run_program_argp_parse_opt (int key, char *arg, struct argp_state *state)
+error_t run_program_argp_parse_opt (int key, char *arg, struct argp_state *state) {
-{
+	runp::config *config = (runp::config*)state->input;
-	RunProgramConfig *config = (RunProgramConfig*)state->input;
 
-	switch (key)
+	switch (key) {
-	{
 		case 'T':
-			config->time_limit = atoi(arg);
+			config->limits.time = atoi(arg);
 			break;
 		case 'R':
-			config->real_time_limit = atoi(arg);
+			config->limits.real_time = atoi(arg);
 			break;
 		case 'M':
-			config->memory_limit = atoi(arg);
+			config->limits.memory = atoi(arg);
 			break;
 		case 'O':
-			config->output_limit = atoi(arg);
+			config->limits.output = atoi(arg);
 			break;
 		case 'S':
-			config->stack_limit = atoi(arg);
+			config->limits.stack = atoi(arg);
 			break;
 		case 'i':
 			config->input_file_name = arg;
@@ -132,10 +75,7 @@ error_t run_program_argp_parse_opt (int key, char *arg, struct argp_state *state
 			config->error_file_name = arg;
 			break;
 		case 'w':
-			config->work_path = realpath(arg);
+			config->work_path = arg;
-			if (config->work_path.empty()) {
-				argp_usage(state);
-			}
 			break;
 		case 'r':
 			config->result_file_name = arg;
@@ -144,10 +84,10 @@ error_t run_program_argp_parse_opt (int key, char *arg, struct argp_state *state
 			config->type = arg;
 			break;
 		case 500:
-			config->extra_readable_files.push_back(realpath(arg));
+			config->readable_file_names.push_back(realpath(arg));
 			break;
 		case 501:
-			config->safe_mode = false;
+			config->unsafe = true;
 			break;
 		case 502:
 			config->need_show_trace_details = true;
@@ -156,18 +96,18 @@ error_t run_program_argp_parse_opt (int key, char *arg, struct argp_state *state
 			config->allow_proc = true;
 			break;
 		case 504:
-			config->extra_readable_files.push_back(arg);
+			config->readable_file_names.push_back(arg);
 			break;
 		case 505:
-			config->extra_writable_files.push_back(realpath(arg));
+			config->writable_file_names.push_back(realpath_for_write(arg));
 			break;
 		case 506:
-			config->extra_writable_files.push_back(arg);
+			config->writable_file_names.push_back(arg);
 			break;
 		case ARGP_KEY_ARG:
-			config->argv.push_back(arg);
+			config->program_name = arg;
 			for (int i = state->next; i < state->argc; i++) {
-				config->argv.push_back(state->argv[i]);
+				config->rest_args.push_back(state->argv[i]);
 			}
 			state->next = state->argc;
 			break;
@@ -191,54 +131,59 @@ argp run_program_argp = {
 	run_program_argp_doc
 };
 
-RunProgramConfig run_program_config;
-
 void parse_args(int argc, char **argv) {
-	run_program_config.time_limit = 1;
+	run_program_config.limits.time = 1;
-	run_program_config.real_time_limit = -1;
+	run_program_config.limits.real_time = -1;
-	run_program_config.memory_limit = 256;
+	run_program_config.limits.memory = 256;
-	run_program_config.output_limit = 64;
+	run_program_config.limits.output = 64;
-	run_program_config.stack_limit = 1024;
+	run_program_config.limits.stack = 1024;
 	run_program_config.input_file_name = "stdin";
 	run_program_config.output_file_name = "stdout";
 	run_program_config.error_file_name = "stderr";
 	run_program_config.work_path = "";
 	run_program_config.result_file_name = "stdout";
 	run_program_config.type = "default";
-	run_program_config.safe_mode = true;
+	run_program_config.unsafe = false;
 	run_program_config.need_show_trace_details = false;
 	run_program_config.allow_proc = false;
 
 	argp_parse(&run_program_argp, argc, argv, ARGP_NO_ARGS | ARGP_IN_ORDER, 0, &run_program_config);
 
-	if (run_program_config.real_time_limit == -1)
+	runp::result::result_file_name = run_program_config.result_file_name;
-		run_program_config.real_time_limit = run_program_config.time_limit + 2;
-	run_program_config.stack_limit = min(run_program_config.stack_limit, run_program_config.memory_limit);
 
-	if (!run_program_config.work_path.empty()) {
+	if (run_program_config.limits.real_time == -1) {
-		if (chdir(run_program_config.work_path.c_str()) == -1) {
+		run_program_config.limits.real_time = run_program_config.limits.time + 2;
-			exit(put_result(run_program_config.result_file_name, RS_JGF));
-		}
 	}
+	run_program_config.limits.stack = min(run_program_config.limits.stack, run_program_config.limits.memory);
 
-	run_program_config.program_name = realpath(run_program_config.argv[0]);
+	// NOTE: program_name is the full path of the program, not just the file name (but can start with "./")
-
 	if (run_program_config.work_path.empty()) {
-		run_program_config.work_path = dirname(run_program_config.program_name);
+		run_program_config.work_path = realpath(getcwd());
-		run_program_config.program_basename = basename(run_program_config.program_name);
+		if (!is_len_valid_path(run_program_config.work_path)) {
-		run_program_config.argv[0] = "./" + run_program_config.program_basename;
+			// work path does not exist
-
+			runp::result(runp::RS_JGF, "error code: WPDNE1").dump_and_exit();
-		if (chdir(run_program_config.work_path.c_str()) == -1) {
+		}
-			exit(put_result(run_program_config.result_file_name, RS_JGF));
+	} else {
+		run_program_config.work_path = realpath(run_program_config.work_path);
+		if (!is_len_valid_path(run_program_config.work_path) || chdir(run_program_config.work_path.c_str()) == -1) {
+			// work path does not exist
+			runp::result(runp::RS_JGF, "error code: WPDNE2").dump_and_exit();
 		}
 	}
+	if (!is_len_valid_path(realpath(run_program_config.program_name))) {
+		// invalid program name
+		runp::result(runp::RS_JGF, "error code: INVPGN2").dump_and_exit();
+	}
+	if (!available_program_type_set.count(run_program_config.type)) {
+		// invalid program type
+		runp::result(runp::RS_JGF, "error code: INVPGT").dump_and_exit();
+	}
 
-	if (run_program_config.type == "python2") {
+	try {
-		string pre[4] = {"/usr/bin/python2.7", "-E", "-s", "-B"};
+		run_program_config.gen_full_args();
-		run_program_config.argv.insert(run_program_config.argv.begin(), pre, pre + 4);
+	} catch (exception &e) {
-	} else if (run_program_config.type == "python3") {
+		// fail to generate full args
-		string pre[3] = {"/usr/bin/python3.8", "-I", "-B"};
+		runp::result(runp::RS_JGF, "error code: GFULARGS").dump_and_exit();
-		run_program_config.argv.insert(run_program_config.argv.begin(), pre, pre + 3);
 	}
 }
 
@@ -255,10 +200,20 @@ void set_limit(int r, int rcur, int rmax = -1)  {
 		exit(55);
 	}
 }
-void run_child() {
+
-	set_limit(RLIMIT_CPU, run_program_config.time_limit, run_program_config.real_time_limit);
+void set_user_cpu_time_limit(int tl) {
-	set_limit(RLIMIT_FSIZE, run_program_config.output_limit << 20);
+	struct itimerval val;
-	set_limit(RLIMIT_STACK, run_program_config.stack_limit << 20);
+	val.it_value = {tl, 100 * 1000};
+	val.it_interval = {0, 100 * 1000};
+	setitimer(ITIMER_VIRTUAL, &val, NULL);
+}
+
+[[noreturn]] void run_child() {
+	setpgid(0, 0);
+
+	set_limit(RLIMIT_FSIZE, run_program_config.limits.output << 20);
+	set_limit(RLIMIT_STACK, run_program_config.limits.stack << 20);
+	// TODO: use https://man7.org/linux/man-pages/man3/vlimit.3.html to limit virtual memory
 
 	if (run_program_config.input_file_name != "stdin") {
 		if (freopen(run_program_config.input_file_name.c_str(), "r", stdin) == NULL) {
@@ -310,76 +265,374 @@ void run_child() {
 		setenv("SHELL", env_shell.c_str(), 1);
 	}
 
-	char **program_c_argv = new char*[run_program_config.argv.size() + 1];
+	char** program_c_argv = new char*[run_program_config.full_args.size() + 1];
-	for (size_t i = 0; i < run_program_config.argv.size(); i++) {
+	for (size_t i = 0; i < run_program_config.full_args.size(); i++) {
-		program_c_argv[i] = new char[run_program_config.argv[i].size() + 1];
+		program_c_argv[i] = run_program_config.full_args[i].data();
-		strcpy(program_c_argv[i], run_program_config.argv[i].c_str());
 	}
-	program_c_argv[run_program_config.argv.size()] = NULL;
+	program_c_argv[run_program_config.full_args.size()] = NULL;
 
 	if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) == -1) {
 		exit(16);
 	}
-	if (execv(program_c_argv[0], program_c_argv) == -1) {
+	kill(getpid(), SIGSTOP);
-		exit(17);
+	if (!run_program_config.unsafe && !set_seccomp_bpf()) {
+		exit(99);
 	}
+
+	pid_t pid = fork();
+	if (pid == 0) {
+		set_user_cpu_time_limit(run_program_config.limits.time);
+		execv(program_c_argv[0], program_c_argv);
+		_exit(17);
+	} else if (pid != -1) {
+		int status;
+		while (wait(&status) > 0);
+	}
+	exit(17);
 }
 
-const int MaxNRPChildren = 50;
+// limit for the safe mode, an upper limit for the number of calls to fork/vfork/clone
-struct rp_child_proc {
+const size_t MAX_TOTAL_RP_CHILDREN = 100;
-	pid_t pid;
+size_t total_rp_children = 0;
-	int mode;
+
-};
+struct timeval start_time;
-int n_rp_children;
+struct timeval end_time;
 pid_t rp_timer_pid;
-rp_child_proc rp_children[MaxNRPChildren];
+vector<rp_child_proc> rp_children;
+struct rusage *ruse0p = NULL;
+
+bool has_real_TLE() {
+	struct timeval elapsed;
+	timersub(&end_time, &start_time, &elapsed);
+	return elapsed.tv_sec >= run_program_config.limits.real_time;
+}
 
 int rp_children_pos(pid_t pid) {
-	for (int i = 0; i < n_rp_children; i++) {
+	for (size_t i = 0; i < rp_children.size(); i++) {
 		if (rp_children[i].pid == pid) {
-			return i;
+			return (int)i;
 		}
 	}
 	return -1;
 }
-int rp_children_add(pid_t pid) {
+void rp_children_add(pid_t pid) {
-	if (n_rp_children == MaxNRPChildren) {
+    rp_child_proc rpc;
-		return -1;
+    rpc.pid = pid;
-	}
+    rpc.flags = CPF_STARTUP | CPF_IGNORE_ONE_SIGSTOP;
-	rp_children[n_rp_children].pid = pid;
+    rp_children.push_back(rpc);
-	rp_children[n_rp_children].mode = -1;
-	n_rp_children++;
-	return 0;
 }
 void rp_children_del(pid_t pid) {
-	int new_n = 0;
+	size_t new_n = 0;
-	for (int i = 0; i < n_rp_children; i++) {
+	for (size_t i = 0; i < rp_children.size(); i++) {
 		if (rp_children[i].pid != pid) {
 			rp_children[new_n++] = rp_children[i];
 		}
 	}
-	n_rp_children = new_n;
+    rp_children.resize(new_n);
+}
+
+string get_usage_summary(struct rusage *rusep) {
+	struct timeval elapsed;
+	timersub(&end_time, &start_time, &elapsed);
+
+	ostringstream sout;
+	struct timeval total_cpu;
+	timeradd(&rusep->ru_utime, &rusep->ru_stime, &total_cpu);
+
+	sout << "[statistics]" << endl;
+	sout << "user CPU / total CPU / elapsed real time: ";
+	sout << rusep->ru_utime.tv_sec * 1000 + rusep->ru_utime.tv_usec / 1000 << "ms / ";
+	sout << total_cpu.tv_sec * 1000 + total_cpu.tv_usec / 1000 << "ms / ";
+	sout << elapsed.tv_sec * 1000 + elapsed.tv_usec / 1000 << "ms." << endl;
+	sout << "max RSS: " << rusep->ru_maxrss << "kb." << endl;
+	sout << "total number of threads: " << total_rp_children + 1 << "." << endl;
+	sout << "voluntary / total context switches: " << rusep->ru_nvcsw << " / " << rusep->ru_nvcsw + rusep->ru_nivcsw << ".";
+
+	return sout.str();
 }
 
 void stop_child(pid_t pid) {
 	kill(pid, SIGKILL);
 }
-void stop_all() {
+
-	kill(rp_timer_pid, SIGKILL);
+void stop_all(runp::result res) {
-	for (int i = 0; i < n_rp_children; i++) {
+	struct rusage tmp, ruse, *rusep = ruse0p;
-		kill(rp_children[i].pid, SIGKILL);
+
+    kill(rp_timer_pid, SIGKILL);
+	killpg(rp_children[0].pid, SIGKILL);
+
+	// in case some process changes its pgid
+    for (auto &rpc : rp_children) {
+		kill(rpc.pid, SIGKILL);
+    }
+
+    int stat;
+    while (true) {
+        pid_t pid = wait4(-1, &stat, __WALL, &tmp);
+        // cerr << "stop_all: wait " << pid << endl;
+        if (pid < 0) {
+            if (errno == EINTR) {
+                continue;
+            } else if (errno == ECHILD) {
+                break;
+            } else {
+                res.dump_and_exit();
+            }
+        }
+
+		if (pid != rp_timer_pid && pid != rp_children[0].pid) {
+			if (res.type != runp::RS_AC) {
+				if (rp_children.size() >= 2 && pid == rp_children[1].pid) {
+					ruse = tmp;
+					rusep = &ruse;
+				}
+			} else if (rp_children.size() >= 2 && pid != rp_children[1].pid) {
+				res = runp::result(runp::RS_RE, "main thread exited before others");
+			}
+		}
+
+        // it is possible that a newly created process hasn't been logged into rp_children
+        // kill it for safty
+        kill(pid, SIGKILL);
+    }
+
+	if (rusep) {
+		res.extra += "\n";
+		res.extra += get_usage_summary(rusep);
+	}
+
+	res.dump_and_exit();
+}
+
+run_event next_event() {
+	static struct rusage ruse;
+	static pid_t prev_pid = -1;
+	run_event e;
+
+	int stat = 0;
+	
+	e.pid = wait4(-1, &stat, __WALL, &ruse);
+	const int wait_errno = errno;
+	gettimeofday(&end_time, NULL);
+
+	ruse0p = NULL;
+	if (e.pid < 0) {
+		if (wait_errno == EINTR) {
+			e.type = ET_SKIP;
+			return e;
+		}
+		stop_all(runp::result(runp::RS_JGF, "error code: WT4FAL")); // wait4 failed
+	}
+
+	if (run_program_config.need_show_trace_details) {
+		if (prev_pid != e.pid) {
+			cerr << "----------" << e.pid << "----------" << endl;
+		}
+		prev_pid = e.pid;
+	}
+
+	if (e.pid == rp_timer_pid) {
+		e.type = WIFEXITED(stat) || WIFSIGNALED(stat) ? ET_REAL_TLE : ET_SKIP;
+		return e;
+	}
+
+	if (has_real_TLE()) {
+		e.type = ET_REAL_TLE;
+		return e;
+	}
+	
+	int p = rp_children_pos(e.pid);
+	if (p == -1) {
+		if (run_program_config.need_show_trace_details) {
+			fprintf(stderr, "new_proc  %lld\n", (long long int)e.pid);
+		}
+		rp_children_add(e.pid);
+		p = (int)rp_children.size() - 1;
+	}
+
+	e.cp = rp_children.data() + p;
+	ruse0p = p == 1 ? &ruse : NULL;
+
+	if (p >= 1) {
+		e.usertim = ruse.ru_utime.tv_sec * 1000 + ruse.ru_utime.tv_usec / 1000;
+		e.usermem = ruse.ru_maxrss;
+		if (e.usertim > run_program_config.limits.time * 1000) {
+			e.type = ET_USER_CPU_TLE;
+			return e;
+		}
+		if (e.usermem > run_program_config.limits.memory * 1024) {
+			e.type = ET_MLE;
+			return e;
+		}
+	}
+
+	if (WIFEXITED(stat)) {
+		if (p == 0) {
+			stop_all(runp::result(runp::RS_JGF, "error code: ZROEX")); // the 0th child process exited unexpectedly
+		}
+		e.type = ET_EXIT;
+		e.exitcode = WEXITSTATUS(stat);
+		return e;
+	}
+
+	if (WIFSIGNALED(stat)) {
+		if (p == 0) {
+			stop_all(runp::result(runp::RS_JGF, "error code: ZROSIG")); // the 0th child process signaled unexpectedly
+		}
+		e.type = ET_SIGNALED;
+		e.sig = WTERMSIG(stat);
+		return e;
+	}
+
+	if (!WIFSTOPPED(stat)) {
+		stop_all(runp::result(runp::RS_JGF, "error code: NSTOP")); // expected WIFSTOPPED, but it is not
+	}
+	
+	e.sig = WSTOPSIG(stat);
+	e.pevent = (unsigned)stat >> 16;
+
+    if (run_program_config.need_show_trace_details) {
+        fprintf(stderr, "sig      : %s\n", strsignal(e.sig));
+    }
+
+	if (e.cp->flags & CPF_STARTUP) {
+		int ptrace_opt = PTRACE_O_EXITKILL;
+		if (p == 0 || !run_program_config.unsafe) {
+			ptrace_opt |= PTRACE_O_TRACECLONE | PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORK;
+		}
+		if (!run_program_config.unsafe) {
+			ptrace_opt |= PTRACE_O_TRACESECCOMP;
+		}
+		if (ptrace(PTRACE_SETOPTIONS, e.pid, NULL, ptrace_opt) == -1) {
+			stop_all(runp::result(runp::RS_JGF, "error code: PTRCFAL")); // ptrace failed
+		}
+        e.cp->flags &= ~CPF_STARTUP;
+	}
+	
+	switch (e.sig) {
+	case SIGTRAP:
+		switch (e.pevent) {
+		case 0:
+		case PTRACE_EVENT_CLONE:
+		case PTRACE_EVENT_FORK:
+		case PTRACE_EVENT_VFORK:
+			e.sig = 0;
+			e.type = ET_RESTART;
+			return e;
+		case PTRACE_EVENT_SECCOMP:
+			e.sig = 0;
+			e.type = ET_SECCOMP_STOP;
+			return e;
+		default:
+			stop_all(runp::result(runp::RS_JGF, "error code: PTRCSIG")); // unknown ptrace signal
+		}
+    case SIGSTOP:
+        if (e.cp->flags & CPF_IGNORE_ONE_SIGSTOP) {
+            e.sig = 0;
+            e.type = ET_RESTART;
+            e.cp->flags &= ~CPF_IGNORE_ONE_SIGSTOP;
+        } else {
+            e.type = ET_SIGNAL_DELIVERY_STOP;
+        }
+        return e;
+	case SIGVTALRM:
+		// use rusage as the only standard for user CPU time TLE
+		// if the program reaches this line... then something goes wrong (rusage says no TLE, but timer says TLE)
+		// just ignore it and wait for another period
+		e.sig = 0;
+		e.type = ET_RESTART;
+		return e;
+	case SIGXFSZ:
+		e.type = ET_OLE;
+		return e;
+	default:
+		e.type = ET_SIGNAL_DELIVERY_STOP;
+		return e;
 	}
 }
 
-RunResult trace_children() {
+void dispatch_event(run_event&& e) {
+	auto restart_op = PTRACE_CONT;
+
+	switch (e.type) {
+	case ET_SKIP:
+		return;
+	case ET_REAL_TLE:
+		stop_all(runp::result(runp::RS_TLE, "elapsed real time limit exceeded: >" + to_string(run_program_config.limits.real_time) + "s"));
+	case ET_USER_CPU_TLE:
+		stop_all(runp::result(runp::RS_TLE, "user CPU time limit exceeded: >" + to_string(run_program_config.limits.time) + "s"));
+	case ET_MLE:
+		stop_all(runp::result(runp::RS_MLE, "max RSS >" + to_string(run_program_config.limits.memory) + "MB"));
+	case ET_OLE:
+		stop_all(runp::result(runp::RS_OLE, "output limit exceeded: >" + to_string(run_program_config.limits.output) + "MB"));
+	case ET_EXIT:
+		if (run_program_config.need_show_trace_details) {
+			fprintf(stderr, "exit     : %d\n", e.exitcode);
+		}
+		if (rp_children[0].flags & CPF_STARTUP) {
+			stop_all(runp::result(runp::RS_JGF, "error code: CPCMDER1")); // rp_children mode error
+		} else if (rp_children.size() < 2 || (rp_children[1].flags & CPF_STARTUP)) {
+			stop_all(runp::result(runp::RS_JGF, "error code: CPCMDER2")); // rp_children mode error
+		} else {
+			if (e.cp == rp_children.data() + 1) {
+                stop_all(runp::result(runp::RS_AC, "exit with code " + to_string(e.exitcode), e.usertim, e.usermem, e.exitcode));
+			} else {
+				rp_children_del(e.pid);
+			}
+		}
+		return;
+
+	case ET_SIGNALED:
+		if (run_program_config.need_show_trace_details) {
+			fprintf(stderr, "sig exit : %s\n", strsignal(e.sig));
+		}
+		if (e.cp == rp_children.data() + 1) {
+			stop_all(runp::result(runp::RS_RE, string("process terminated by signal: ") + strsignal(e.sig)));
+		} else {
+			rp_children_del(e.pid);
+		}
+		return;
+
+	case ET_SECCOMP_STOP:
+		if (e.cp != rp_children.data() + 0 && !run_program_config.unsafe) {
+			if (!e.cp->check_safe_syscall()) {
+				if (e.cp->suspicious) {
+					stop_all(runp::result(runp::RS_DGS, e.cp->error));
+				} else {
+					stop_all(runp::result(runp::RS_RE, e.cp->error));
+				}
+			}
+            if (e.cp->try_to_create_new_process) {
+                total_rp_children++;
+                if (total_rp_children > MAX_TOTAL_RP_CHILDREN) {
+                    stop_all(runp::result(runp::RS_DGS, "the limit on the amount of child processes is exceeded"));
+                }
+            }
+		}
+		break;
+
+	case ET_SIGNAL_DELIVERY_STOP:
+		break;
+
+	case ET_RESTART:
+		break;
+	}
+
+	if (ptrace(restart_op, e.pid, NULL, e.sig) < 0) {
+		if (errno != ESRCH) {
+			stop_all(runp::result(runp::RS_JGF, "error code: PTRESFAL")); // ptrace restart failed
+		}
+	}
+}
+
+[[noreturn]] void trace_children() {
 	rp_timer_pid = fork();
 	if (rp_timer_pid == -1) {
-		stop_all();
+		runp::result(runp::RS_JGF, "error code: FKFAL2").dump_and_exit(); // fork failed
-		return RunResult(RS_JGF);
 	} else if (rp_timer_pid == 0) {
 		struct timespec ts;
-		ts.tv_sec = run_program_config.real_time_limit;
+		ts.tv_sec = run_program_config.limits.real_time;
-		ts.tv_nsec = 0;
+		ts.tv_nsec = 100 * 1000000;
 		nanosleep(&ts, NULL);
 		exit(0);
 	}
@@ -388,185 +641,30 @@ RunResult trace_children() {
 		cerr << "timerpid " << rp_timer_pid << endl;
 	}
 
-	pid_t prev_pid = -1;
 	while (true) {
-		int stat = 0;
+		dispatch_event(next_event());
-		int sig = 0;
-		struct rusage ruse;
-		
-		pid_t pid = wait4(-1, &stat, __WALL, &ruse);
-		if (run_program_config.need_show_trace_details) {
-			if (prev_pid != pid) {
-				cerr << "----------" << pid << "----------" << endl;
-			}
-			prev_pid = pid;
-		}
-		if (pid == rp_timer_pid) {
-			if (WIFEXITED(stat) || WIFSIGNALED(stat)) {
-				stop_all();
-				return RunResult(RS_TLE);
-			}
-			continue;
-		}
-		
-		int p = rp_children_pos(pid);
-		if (p == -1) {
-			if (run_program_config.need_show_trace_details) {
-				fprintf(stderr, "new_proc  %lld\n", (long long int)pid);
-			}
-			if (rp_children_add(pid) == -1) {
-				stop_child(pid);
-				stop_all();
-				return RunResult(RS_DGS);
-			}
-			p = n_rp_children - 1;
-		}
-
-		int usertim = ruse.ru_utime.tv_sec * 1000 + ruse.ru_utime.tv_usec / 1000;
-		int usermem = ruse.ru_maxrss;
-		if (usertim > run_program_config.time_limit * 1000) {
-			stop_all();
-			return RunResult(RS_TLE);
-		}
-		if (usermem > run_program_config.memory_limit * 1024) {
-			stop_all();
-			return RunResult(RS_MLE);
-		}
-
-		if (WIFEXITED(stat)) {
-			if (run_program_config.need_show_trace_details) {
-				fprintf(stderr, "exit     : %d\n", WEXITSTATUS(stat));
-			}
-			if (rp_children[0].mode == -1) {
-				stop_all();
-				return RunResult(RS_JGF, -1, -1, WEXITSTATUS(stat));
-			} else {
-				if (pid == rp_children[0].pid) {
-					stop_all();
-					return RunResult(RS_AC, usertim, usermem, WEXITSTATUS(stat));
-				} else {
-					rp_children_del(pid);
-					continue;
-				}
-			}
-		}
-
-		if (WIFSIGNALED(stat)) {
-			if (run_program_config.need_show_trace_details) {
-				fprintf(stderr, "sig exit : %d\n", WTERMSIG(stat));
-			}
-			if (pid == rp_children[0].pid) {
-				switch(WTERMSIG(stat)) {
-				case SIGXCPU: // nearly impossible
-					stop_all();
-					return RunResult(RS_TLE);
-				case SIGXFSZ:
-					stop_all();
-					return RunResult(RS_OLE);
-				default:
-					stop_all();
-					return RunResult(RS_RE);
-				}
-			} else {
-				rp_children_del(pid);
-				continue;
-			}
-		}
-		
-		if (WIFSTOPPED(stat)) {
-			sig = WSTOPSIG(stat);
-			
-			if (rp_children[p].mode == -1) {
-				if ((p == 0 && sig == SIGTRAP) || (p != 0 && sig == SIGSTOP)) {
-					if (p == 0) {
-						int ptrace_opt = PTRACE_O_EXITKILL | PTRACE_O_TRACESYSGOOD;
-						if (run_program_config.safe_mode) {
-							ptrace_opt |= PTRACE_O_TRACECLONE | PTRACE_O_TRACEFORK | PTRACE_O_TRACEVFORK;
-							ptrace_opt |= PTRACE_O_TRACEEXEC;
-						}
-						if (ptrace(PTRACE_SETOPTIONS, pid, NULL, ptrace_opt) == -1) {
-							stop_all();
-							return RunResult(RS_JGF);
-						}
-					}
-					sig = 0;
-				}
-				rp_children[p].mode = 0;
-			} else if (sig == (SIGTRAP | 0x80)) {
-				if (rp_children[p].mode == 0) {
-					if (run_program_config.safe_mode) {
-						if (!check_safe_syscall(pid, run_program_config.need_show_trace_details)) {
-							stop_all();
-							return RunResult(RS_DGS);
-						}
-					}
-					rp_children[p].mode = 1;
-				} else {
-					if (run_program_config.safe_mode) {
-						on_syscall_exit(pid, run_program_config.need_show_trace_details);
-					}
-					rp_children[p].mode = 0;
-				}
-				
-				sig = 0;
-			} else if (sig == SIGTRAP) {
-				switch ((stat >> 16) & 0xffff) {
-					case PTRACE_EVENT_CLONE:
-					case PTRACE_EVENT_FORK:
-					case PTRACE_EVENT_VFORK:
-						sig = 0;
-						break;
-					case PTRACE_EVENT_EXEC:
-						rp_children[p].mode = 1;
-						sig = 0;
-						break;
-					case 0:
-						break;
-					default:
-						stop_all();
-						return RunResult(RS_JGF);
-				}
-			}
-
-			if (sig != 0) {
-				if (run_program_config.need_show_trace_details) {
-					fprintf(stderr, "sig      : %d\n", sig);
-				}
-			}
-			
-			switch(sig) {
-			case SIGXCPU:
-				stop_all();
-				return RunResult(RS_TLE);
-			case SIGXFSZ:
-				stop_all();
-				return RunResult(RS_OLE);
-			}
-		}
-		
-		ptrace(PTRACE_SYSCALL, pid, NULL, sig);
 	}
 }
 
-RunResult run_parent(pid_t pid) {
-	init_conf(run_program_config);
-	
-	n_rp_children = 0;
-
-	rp_children_add(pid);
-	return trace_children();
-}
 int main(int argc, char **argv) {
-	self_path[readlink("/proc/self/exe", self_path, PATH_MAX)] = '\0';
+	try {
-	parse_args(argc, argv);
+		fs::path self_path = fs::read_symlink("/proc/self/exe");
+		runp::run_path = self_path.parent_path();
+	} catch (exception &e) {
+		runp::result(runp::RS_JGF, "error code: PTHFAL2").dump_and_exit(); // path failed
+	}
 
+	parse_args(argc, argv);
+	init_conf();
+
+	gettimeofday(&start_time, NULL);
 	pid_t pid = fork();
 	if (pid == -1) {
-		return put_result(run_program_config.result_file_name, RS_JGF);
+		runp::result(runp::RS_JGF, "error code: FKFAL2").dump_and_exit(); // fork failed
 	} else if (pid == 0) {
 		run_child();
 	} else {
-		return put_result(run_program_config.result_file_name, run_parent(pid));
+		rp_children_add(pid);
+		trace_children();
 	}
-	return put_result(run_program_config.result_file_name, RS_JGF);
 }

judger/uoj_judger/run/run_program_sandbox.h

@@ -0,0 +1,760 @@
+#include <iostream>
+#include <sstream>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <string>
+#include <fstream>
+#include <vector>
+#include <set>
+#include <algorithm>
+#include <unistd.h>
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <sys/resource.h>
+#include <sys/user.h>
+#include <sys/time.h>
+#include <sys/prctl.h>
+#include <fcntl.h>
+#include <argp.h>
+#include <seccomp.h>
+#include "uoj_run.h"
+
+enum EX_CHECK_TYPE : unsigned {
+	ECT_NONE              = 0,
+	ECT_CNT               = 1,
+	ECT_FILE_OP           = 1 << 1,                         // it is a file operation
+	ECT_END_AT            = 1 << 2,                         // this file operation ends with "at" (e.g., openat)
+	ECT_FILEAT_OP         = ECT_FILE_OP | ECT_END_AT,       // it is a file operation ended with "at"
+	ECT_FILE_W            = 1 << 3,                         // intend to write
+	ECT_FILE_R            = 1 << 4,                         // intend to read
+	ECT_FILE_S            = 1 << 5,                         // intend to stat
+	ECT_CHECK_OPEN_FLAGS  = 1 << 6,                         // check flags to determine whether it is to read/write (for open and openat)
+	ECT_FILE2_W           = 1 << 7,                         // intend to write (2nd file)
+	ECT_FILE2_R           = 1 << 8,                         // intend to read  (2nd file)
+	ECT_FILE2_S           = 1 << 9,                         // intend to stat  (2nd file)
+	ECT_CLONE_THREAD      = 1 << 10,                        // for clone(). Check that clone is making a non-suspicious thread
+	ECT_KILL_SIG0_ALLOWED = 1 << 11,                        // forbid kill but killing with sig0 is allowed
+};
+
+struct syscall_info {
+    EX_CHECK_TYPE extra_check;
+    int max_cnt;
+    bool should_soft_ban = false;
+    bool is_kill = false;
+
+    syscall_info()
+		: extra_check(ECT_CNT), max_cnt(0) {}
+    syscall_info(unsigned extra_check, int max_cnt)
+        : extra_check((EX_CHECK_TYPE)extra_check), max_cnt(max_cnt) {}
+    
+    static syscall_info unlimited() {
+        return syscall_info(ECT_NONE, -1);
+    }
+
+	static syscall_info count_based(int max_cnt) {
+		return syscall_info(ECT_CNT, max_cnt);
+	}
+
+    static syscall_info with_extra_check(unsigned extra_check, int max_cnt = -1) {
+		if (max_cnt != -1) {
+			extra_check |= ECT_CNT;
+		}
+		return syscall_info(extra_check, max_cnt);
+    }
+
+    static syscall_info kill_type_syscall(unsigned extra_check = ECT_CNT, int max_cnt = 0) {
+		if (max_cnt != -1) {
+			extra_check |= ECT_CNT;
+		}
+        syscall_info res(extra_check, max_cnt);
+        res.is_kill = true;
+        return res;
+    }
+
+    static syscall_info soft_ban() {
+        syscall_info res(ECT_CNT, 0);
+        res.should_soft_ban = true;
+        return res;
+    }
+};
+
+#include "run_program_conf.h"
+
+namespace fs = std::filesystem;
+using namespace std;
+
+typedef unsigned long long int reg_val_t;
+#define REG_SYSCALL orig_rax
+#define REG_RET rax
+#define REG_ARG0 rdi
+#define REG_ARG1 rsi
+#define REG_ARG2 rdx
+#define REG_ARG3 rcx
+
+enum CHILD_PROC_FLAG : unsigned {
+	CPF_STARTUP = 1u << 0,
+	CPF_IGNORE_ONE_SIGSTOP = 1u << 2
+};
+
+struct rp_child_proc {
+	pid_t pid;
+
+	unsigned flags;
+
+	struct user_regs_struct reg = {};
+	int syscall = -1;
+	string error;
+	bool suspicious = false;
+    bool try_to_create_new_process = false;
+
+	void set_error_for_suspicious(const string &error);
+	void set_error_for_kill();
+	void soft_ban_syscall(int set_no);
+	bool check_safe_syscall();
+	bool check_file_permission(const string &op, const string &fn, char mode);
+};
+
+const size_t MAX_PATH_LEN = 512;
+const uint64_t MAX_FD_ID = 1 << 20;
+
+const string INVALID_PATH(PATH_MAX + 8, 'X');
+const string EMPTY_PATH_AFTER_FD = "?empty_path_after_fd";
+
+runp::config run_program_config;
+
+set<string> writable_file_name_set;
+set<string> readable_file_name_set;
+set<string> statable_file_name_set;
+set<string> soft_ban_file_name_set;
+
+syscall_info syscall_info_set[N_SYSCALL];
+
+pid_t get_tgid_from_pid(pid_t pid) {
+	ifstream fin("/proc/" + to_string(pid) + "/status");
+	string key;
+	while (fin >> key) {
+		if (key == "Tgid:") {
+			pid_t tgid;
+			if (fin >> tgid) {
+				return tgid;
+			} else {
+				return -1;
+			}
+		}
+	}
+	return -1;
+}
+
+bool is_len_valid_path(const string &path) {
+	return !path.empty() && path.size() <= MAX_PATH_LEN;
+}
+
+string path_or_len_invalid(const string &path) {
+	return is_len_valid_path(path) ? path : INVALID_PATH;
+}
+
+string basename(const string &path) {
+	if (!is_len_valid_path(path)) {
+		return INVALID_PATH;
+	}
+	size_t p = path.rfind('/');
+	if (p == string::npos) {
+		return path;
+	} else {
+		return path.substr(p + 1); // can be empty, e.g., path = "abc/"
+	}
+}
+string dirname(const string &path) {
+	if (!is_len_valid_path(path)) {
+		return INVALID_PATH;
+	}
+	size_t p = path.rfind('/');
+	if (p == string::npos) {
+		return INVALID_PATH;
+	} else {
+		return path.substr(0, p); // can be empty, e.g., path = "/abc"
+	}
+}
+string realpath(const string &path) {
+	if (!is_len_valid_path(path)) {
+		return INVALID_PATH;
+	}
+	static char real[PATH_MAX + 1] = {};
+	if (realpath(path.c_str(), real) == NULL) {
+		return INVALID_PATH;
+	}
+	return path_or_len_invalid(real);
+}
+string realpath_for_write(const string &path) {
+	string real = realpath(path);
+	if (!is_len_valid_path(path)) {
+		return INVALID_PATH;
+	}
+
+	string b = basename(path);
+	if (!is_len_valid_path(b) || b == "." || b == "..") {
+		return INVALID_PATH;
+	}
+	real = realpath(dirname(path));
+	if (!is_len_valid_path(real)) {
+		return INVALID_PATH;
+	}
+	return path_or_len_invalid(real + "/" + b);
+}
+string readlink(const string &path) {
+	if (!is_len_valid_path(path)) {
+		return INVALID_PATH;
+	}
+	static char buf[MAX_PATH_LEN + 1];
+	ssize_t n = readlink(path.c_str(), buf, MAX_PATH_LEN + 1);
+	if (n > (ssize_t)MAX_PATH_LEN) {
+		return INVALID_PATH;
+	} else {
+		buf[n] = '\0';
+		return path_or_len_invalid(buf);
+	}
+}
+string getcwd() {
+	char cwd[MAX_PATH_LEN + 1];
+	if (getcwd(cwd, MAX_PATH_LEN) == NULL) {
+		return INVALID_PATH;
+	} else {
+		return path_or_len_invalid(cwd);
+	}
+}
+string getcwdp(pid_t pid) {
+	return realpath("/proc/" + (pid == 0 ? "self" : to_string(pid)) + "/cwd");
+}
+string abspath(const string &path, pid_t pid, int fd = AT_FDCWD) {
+	static int depth = 0;
+	if (depth == 10 || !is_len_valid_path(path)) {
+		return INVALID_PATH;
+	}
+
+	vector<string> lv;
+	for (string cur = path; is_len_valid_path(cur); cur = dirname(cur)) {
+		lv.push_back(basename(cur));
+	}
+	reverse(lv.begin(), lv.end());
+
+	string pos;
+	if (path[0] == '/') {
+		pos = "/";
+	} else if (fd == AT_FDCWD) {
+		pos = getcwdp(pid);
+	} else {
+		depth++;
+		pos = abspath("/proc/self/fd/" + to_string(fd), pid);
+		depth--;
+	}
+	if (!is_len_valid_path(pos)) {
+		return INVALID_PATH;
+	}
+
+	struct stat stat_buf;
+	bool reachable = true;
+	for (auto &v : lv) {
+		if (reachable) {
+			if (lstat(pos.c_str(), &stat_buf) < 0 || !S_ISDIR(stat_buf.st_mode)) {
+				reachable = false;
+			}
+		}
+
+		if (reachable) {
+			if (v == ".") {
+				continue;
+			} else if (v == "..") {
+				pos = dirname(pos);
+				if (pos.empty()) {
+					pos = "/";
+				}
+				continue;
+			}
+		}
+
+		if (v.empty()) {
+			continue;
+		}
+		if (pos.back() != '/') {
+			pos += '/';
+		}
+		pos += v;
+		if (pos.size() > MAX_PATH_LEN) {
+			return INVALID_PATH;
+		}
+
+		if (reachable) {
+			string realpos;
+			if (pos == "/proc/self") {
+				realpos = "/proc/" + to_string(get_tgid_from_pid(pid));
+			} else if (pos == "/proc/thread-self") {
+				realpos = "/proc/" + to_string(get_tgid_from_pid(pid)) + "/" + to_string(pid);
+			} else {
+				if (lstat(pos.c_str(), &stat_buf) < 0) {
+					reachable = false;
+					continue;
+				}
+				if (!S_ISLNK(stat_buf.st_mode)) {
+					continue;
+				}
+				realpos = readlink(pos);
+				if (!is_len_valid_path(realpos)) {
+					return INVALID_PATH;
+				}
+				if (realpos[0] != '/') {
+					realpos = dirname(pos) + "/" + realpos;
+				}
+			}
+
+			depth++;
+			realpos = abspath(realpos, pid);
+			depth--;
+			if (!is_len_valid_path(realpos)) {
+				return INVALID_PATH;
+			}
+			pos = realpos;
+		}
+	}
+
+	return path_or_len_invalid(pos);
+}
+string getfdp(pid_t pid, int fd) {
+	if (fd == AT_FDCWD) {
+		return getcwdp(pid);
+	} else {
+		return abspath("/proc/self/fd/" + to_string(fd), pid);
+	}
+}
+
+inline bool is_in_set_smart(string name, const set<string> &s) {
+	if (name.size() > MAX_PATH_LEN) {
+		return false;
+	}
+	if (s.count(name)) {
+		return true;
+	}
+	int level;
+	for (level = 0; !name.empty(); name = dirname(name), level++) {
+		if (level == 1 && s.count(name + "/*")) {
+			return true;
+		}
+		if (s.count(name + "/")) {
+			return true;
+		}
+	}
+	if (level == 1 && s.count("/*")) {
+		return true;
+	}
+	if (s.count("/")) {
+		return true;
+	}
+	return false;
+}
+
+inline bool is_writable_file(string name) {
+	if (name == "/") {
+		return writable_file_name_set.count("system_root");
+	}
+	return is_in_set_smart(name, writable_file_name_set);
+}
+inline bool is_readable_file(const string &name) {
+	if (name == "/") {
+		return readable_file_name_set.count("system_root");
+	}
+	return is_in_set_smart(name, readable_file_name_set);
+}
+inline bool is_statable_file(const string &name) {
+	if (name == "/") {
+		return statable_file_name_set.count("system_root");
+	}
+	return is_in_set_smart(name, statable_file_name_set);
+}
+inline bool is_soft_ban_file(const string &name) {
+	if (name == "/") {
+		return soft_ban_file_name_set.count("system_root");
+	}
+	return is_in_set_smart(name, soft_ban_file_name_set);
+}
+
+void add_file_permission(const string &file_name, char mode) {
+	if (file_name.empty()) {
+		return;
+	}
+	if (mode == 'w') {
+		writable_file_name_set.insert(file_name);
+	} else if (mode == 'r') {
+		readable_file_name_set.insert(file_name);
+	} else if (mode == 's') {
+		statable_file_name_set.insert(file_name);
+	}
+	if (file_name == "system_root") {
+		return;
+	}
+	for (string name = dirname(file_name); !name.empty(); name = dirname(name)) {
+		statable_file_name_set.insert(name);
+	}
+}
+
+void init_conf() {    
+	const runp::config &config = run_program_config;
+	add_file_permission(config.work_path, 'r');
+	add_file_permission(config.work_path + "/", 's');
+	if (folder_program_type_set.count(config.type)) {
+		add_file_permission(realpath(config.program_name) + "/", 'r');
+	} else {
+		add_file_permission(realpath(config.program_name), 'r');
+	}
+
+	vector<string> loads;
+	loads.push_back("default");
+	if (config.allow_proc) {
+		loads.push_back("allow_proc");
+	}
+	if (config.type != "default") {
+		loads.push_back(config.type);
+	}
+	
+	for (string type : loads) {
+		if (allowed_syscall_list.count(type)) {
+			for (const auto &kv : allowed_syscall_list[type]) {
+				syscall_info_set[kv.first] = kv.second;
+			}
+		}
+		if (soft_ban_file_name_list.count(type)) {
+			for (const auto &name : soft_ban_file_name_list[type]) {
+				soft_ban_file_name_set.insert(name);
+			}
+		}
+		if (statable_file_name_list.count(type)) {
+			for (const auto &name : statable_file_name_list[type]) {
+				add_file_permission(name, 's');
+			}
+		}
+		if (readable_file_name_list.count(type)) {
+			for (const auto &name : readable_file_name_list[type]) {
+				add_file_permission(name, 'r');
+			}
+		}
+		if (writable_file_name_list.count(type)) {
+			for (const auto &name : writable_file_name_list[type]) {
+				add_file_permission(name, 'w');
+			}
+		}
+	}
+
+    for (const auto &name : config.readable_file_names) {
+		add_file_permission(name, 'r');
+    }
+	for (const auto &name : config.writable_file_names) {
+		add_file_permission(name, 'w');
+	}
+
+	if (config.type == "python2.7" || config.type == "python3") {
+		soft_ban_file_name_set.insert(dirname(realpath(config.program_name)) + "/__pycode__/");
+	} else if (config.type == "compiler") {
+		add_file_permission(config.work_path + "/", 'w');
+	}
+
+	readable_file_name_set.insert(writable_file_name_set.begin(), writable_file_name_set.end());
+	statable_file_name_set.insert(readable_file_name_set.begin(), readable_file_name_set.end());
+}
+
+string read_string_from_addr(reg_val_t addr, pid_t pid) {
+	int max_len = MAX_PATH_LEN + sizeof(reg_val_t);
+	char res[max_len + 1], *ptr = res;
+	while (ptr != res + max_len) {
+		*(reg_val_t*)ptr = ptrace(PTRACE_PEEKDATA, pid, addr, NULL);
+		for (size_t i = 0; i < sizeof(reg_val_t); i++, ptr++, addr++) {
+			if (*ptr == 0) {
+				return res;
+			}
+		}
+	}
+	res[max_len] = 0;
+	return res;
+}
+string read_abspath_from_addr(reg_val_t addr, pid_t pid) {
+	string p = read_string_from_addr(addr, pid);
+	string a = abspath(p, pid);
+	if (run_program_config.need_show_trace_details) {
+		fprintf(stderr, "path     : %s -> %s\n", p.c_str(), is_len_valid_path(a) ? a.c_str() : "INVALID!");
+	}
+	return a;
+}
+string read_abspath_from_fd_and_addr(reg_val_t fd, reg_val_t addr, pid_t pid) {
+	if (fd > MAX_FD_ID && (int)fd != AT_FDCWD) {
+		return INVALID_PATH;
+	}
+	string p = read_string_from_addr(addr, pid);
+	string a;
+	if (p.empty()) {
+		// this case is tricky
+		// if p is empty, in the following cases, Linux will understand the path as the path of fd:
+		// newfstatat + AT_EMPTY_PATH, linkat + AT_EMPTY_PATH, execveat + AT_EMPTY_PATH, readlinkat
+		// otherwise, the syscall will return with an error
+        // since fd is already opened, the program should have the permission to do the things listed above
+        // (no read -> write conversion, no deletion, no chmod, etc.)
+        // we just report this special case. the program will skip the permission check later
+        a = EMPTY_PATH_AFTER_FD;
+	} else {
+		a = abspath(p, pid, (int)fd);
+	}
+	if (run_program_config.need_show_trace_details) {
+		fprintf(stderr, "path     : %d, %s -> %s\n", (int)fd, p.c_str(), is_len_valid_path(a) ? a.c_str() : "INVALID!");
+	}
+	return a;
+}
+
+bool set_seccomp_bpf() {
+    scmp_filter_ctx ctx = seccomp_init(SCMP_ACT_TRACE(0));
+    if (!ctx) {
+        return false;
+    }
+
+    try {
+		for (int no : supported_soft_ban_errno_list) {
+			if (seccomp_rule_add(ctx, SCMP_ACT_ERRNO(no), SYSCALL_SOFT_BAN_MASK | no, 0) < 0) {
+				throw system_error();
+			}
+		}
+
+		for (int i = 0; i < N_SYSCALL; i++) {
+			if (syscall_info_set[i].extra_check == ECT_NONE) {
+				if (syscall_info_set[i].should_soft_ban) {
+					if (seccomp_rule_add(ctx, SCMP_ACT_ERRNO(EPERM), i, 0) < 0) {
+						throw system_error();
+					}
+				} else {
+					if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, i, 0) < 0) {
+						throw system_error();
+					}
+				}
+			}
+		}
+		seccomp_load(ctx);
+    } catch (system_error &e) {
+		seccomp_release(ctx);
+        return false;
+    }
+	seccomp_release(ctx);
+    return true;
+}
+
+void rp_child_proc::set_error_for_suspicious(const string &error) {
+	this->suspicious = true;
+	this->error = "suspicious system call invoked: " + error;
+}
+
+void rp_child_proc::set_error_for_kill() {
+	this->suspicious = false;
+	reg_val_t sig = this->syscall == __NR_tgkill ? this->reg.REG_ARG2 : this->reg.REG_ARG1;
+	this->error = "signal sent via " + syscall_name[this->syscall] + ": ";
+	if (sig != (unsigned)sig) {
+		this->error += "Unknown signal " + to_string(sig);
+	} else {
+		this->error += strsignal((int)sig);
+	}
+}
+
+void rp_child_proc::soft_ban_syscall(int set_no = EPERM) {
+	this->reg.REG_SYSCALL = SYSCALL_SOFT_BAN_MASK | set_no;
+	ptrace(PTRACE_SETREGS, pid, NULL, &this->reg);
+}
+
+bool rp_child_proc::check_file_permission(const string &op, const string &fn, char mode) {
+	string real_fn;
+	if (!fn.empty()) {
+		real_fn = mode == 'w' ? realpath_for_write(fn) : realpath(fn);
+	}
+	if (!is_len_valid_path(real_fn)) {
+		// path invalid or file not found
+		// ban this syscall softly
+		this->soft_ban_syscall(ENOENT);
+		return true;
+	}
+
+	string path_proc_self = "/proc/" + to_string(get_tgid_from_pid(this->pid));
+	if (real_fn.compare(0, path_proc_self.size() + 1, path_proc_self + "/") == 0) {
+		real_fn = "/proc/self" + real_fn.substr(path_proc_self.size());
+	} else if (real_fn == path_proc_self) {
+		real_fn = "/proc/self";
+	}
+
+	bool ok;
+	switch (mode) {
+	case 'w':
+		ok = is_writable_file(real_fn);
+		break;
+	case 'r':
+		ok = is_readable_file(real_fn);
+		break;
+	case 's':
+		ok = is_statable_file(real_fn);
+		break;
+	default:
+		ok = false;
+		break;
+	}
+
+	if (ok) {
+		return true;
+	}
+
+	if (run_program_config.need_show_trace_details) {
+		fprintf(stderr, "check file permission %s : %s\n", op.c_str(), real_fn.c_str());
+		fprintf(stderr, "[readable]\n");
+		for (auto s: readable_file_name_set) {
+			cerr << s << endl;
+		}
+		fprintf(stderr, "[writable]\n");
+		for (auto s: writable_file_name_set) {
+			cerr << s << endl;
+		}
+	}
+
+	if (is_soft_ban_file(real_fn)) {
+		this->soft_ban_syscall(EACCES);
+		return true;
+	} else {
+		this->set_error_for_suspicious("intended to access a file without permission: " + op);
+		return false;
+	}
+}
+
+bool rp_child_proc::check_safe_syscall() {
+	ptrace(PTRACE_GETREGS, pid, NULL, &reg);
+
+	int cur_instruction = ptrace(PTRACE_PEEKTEXT, pid, reg.rip - 2, NULL) & 0xffff;
+	if (cur_instruction != 0x050f) {
+		if (run_program_config.need_show_trace_details) {
+			fprintf(stderr, "informal syscall  %d\n", cur_instruction);
+		}
+		this->set_error_for_suspicious("incorrect opcode " + to_string(cur_instruction));
+		return false;
+	}
+
+	if (0 > (long long int)reg.REG_SYSCALL || (long long int)reg.REG_SYSCALL >= N_SYSCALL)  {
+		this->set_error_for_suspicious(to_string(reg.REG_SYSCALL));
+		return false;
+	}
+	syscall = (int)reg.REG_SYSCALL;
+	if (run_program_config.need_show_trace_details) {
+		fprintf(stderr, "[syscall %s]\n", syscall_name[syscall].c_str());
+	}
+    this->try_to_create_new_process = syscall == __NR_fork || syscall == __NR_clone || syscall == __NR_clone3 || syscall == __NR_vfork;
+
+	auto &cursc = syscall_info_set[syscall];
+
+	if (cursc.extra_check & ECT_CNT) {
+		if (cursc.max_cnt == 0) {
+			if (cursc.should_soft_ban) {
+				this->soft_ban_syscall();
+				return true;
+			} else {
+				if (cursc.is_kill) {
+					this->set_error_for_kill();
+				} else {
+					this->set_error_for_suspicious(syscall_name[syscall]);
+				}
+				return false;
+			}
+		}
+		cursc.max_cnt--; 
+	}
+
+	if (cursc.extra_check & ECT_KILL_SIG0_ALLOWED) {
+		reg_val_t sig = this->syscall == __NR_tgkill ? this->reg.REG_ARG2 : this->reg.REG_ARG1;
+		if (sig != 0) {
+			this->set_error_for_kill();
+			return false;
+		}
+	}
+
+	if (cursc.extra_check & ECT_FILE_OP) {
+		string fn;
+		if (cursc.extra_check & ECT_END_AT) {
+			fn = read_abspath_from_fd_and_addr(reg.REG_ARG0, reg.REG_ARG1, pid);
+		} else {
+			fn = read_abspath_from_addr(reg.REG_ARG0, pid);
+		}
+
+		string textop = syscall_name[syscall];
+		char mode = 'w';
+		if (cursc.extra_check & ECT_CHECK_OPEN_FLAGS) {
+			reg_val_t flags = cursc.extra_check & ECT_END_AT ? reg.REG_ARG2 : reg.REG_ARG1;
+			switch (flags & O_ACCMODE) {
+			case O_RDONLY:
+				if ((flags & O_CREAT) == 0 && (flags & O_EXCL) == 0 && (flags & O_TRUNC) == 0) {
+					textop += " (for read)";
+					mode = 'r';
+				} else {
+					textop += " (for read & write)";
+				}
+				break;
+			case O_WRONLY:
+				textop += " (for write)";
+				break;
+			case O_RDWR:
+				textop += " (for read & write)";
+				break;
+			default:
+				textop += " (with invalid flags)";
+				break;
+			}
+		} else if (cursc.extra_check & ECT_FILE_S) {
+			mode = 's';
+		} else if (cursc.extra_check & ECT_FILE_R) {
+			mode = 'r';
+		} else if (cursc.extra_check & ECT_FILE_W) {
+			mode = 'w';
+		} // else, error!
+
+		if (run_program_config.need_show_trace_details) {
+			fprintf(stderr, "%-8s : %s\n", syscall_name[syscall].c_str(), fn.c_str());
+		}
+		if (fn != EMPTY_PATH_AFTER_FD && !check_file_permission(textop, fn, mode)) {
+			return false;
+		}
+
+		if (cursc.extra_check & ECT_FILE2_S) {
+			mode = 's';
+		} else if (cursc.extra_check & ECT_FILE2_R) {
+			mode = 'r';
+		} else if (cursc.extra_check & ECT_FILE2_W) {
+			mode = 'w';
+		} else {
+			mode = '?';
+		}
+		if (mode != '?') {
+			if (cursc.extra_check & ECT_END_AT) {
+				fn = read_abspath_from_fd_and_addr(reg.REG_ARG2, reg.REG_ARG3, pid);
+			} else {
+				fn = read_abspath_from_addr(reg.REG_ARG1, pid);
+			}
+			if (run_program_config.need_show_trace_details) {
+				fprintf(stderr, "%-8s : %s\n", syscall_name[syscall].c_str(), fn.c_str());
+			}
+			if (fn != EMPTY_PATH_AFTER_FD && !check_file_permission(textop, fn, mode)) {
+				return false;
+			}
+		}
+	}
+
+	if (cursc.extra_check & ECT_CLONE_THREAD) {
+		reg_val_t flags = reg.REG_ARG0;
+		if (!(flags & CLONE_THREAD)) {
+			this->set_error_for_suspicious("intended to create a new process");
+			return false;
+		}
+		auto standard_flags = CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND;
+		standard_flags |= CLONE_SYSVSEM | CLONE_SETTLS |CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID;
+		if (!(flags & standard_flags)) {
+			this->set_error_for_suspicious("intended to create a non-standard thread");
+			return false;
+		}
+	}
+
+	return true;
+}

web/Dockerfile

@@ -1,12 +1,13 @@
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 ARG CLONE_ADDFLAG
 
 ENV DEBIAN_FRONTEND=noninteractive
 RUN dpkg -s gnupg 2>/dev/null || (apt-get update && apt-get install -y gnupg) &&\
-echo "deb http://ppa.launchpad.net/stesie/libv8/ubuntu bionic main" | tee /etc/apt/sources.list.d/stesie-libv8.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys D858A0DF &&\
+echo "deb http://ppa.launchpad.net/stesie/libv8/ubuntu bionic main" | tee /etc/apt/sources.list.d/stesie-libv8.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1A10946ED858A0DF &&\
-apt-get update && apt-get install -y git vim ntp zip unzip curl wget apache2 libapache2-mod-xsendfile libapache2-mod-php php php-dev php-pear php-zip php-mysql php-mbstring php-gd php-intl php-xsl g++ make re2c libv8-7.5-dev libyaml-dev &&\
+echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu jammy main" | tee /etc/apt/sources.list.d/ondrej-php.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4F4EA0AAE5267A6C &&\
-yes | pecl install yaml &&\
+apt-get update --allow-unauthenticated &&\
+apt-get install -y --allow-unauthenticated -o Dpkg::Options::="--force-overwrite" libv8 php7.4 php7.4-yaml php7.4-xml php7.4-dev php7.4-zip php7.4-mysql php7.4-mbstring php7.4-gd libseccomp-dev git vim ntp zip unzip curl wget libapache2-mod-xsendfile mysql-server php-pear cmake fp-compiler re2c libv8-7.5-dev libyaml-dev python2.7 python3.10 python3-requests openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk &&\
 git clone https://github.com/phpv8/v8js.git --depth=1 -b 2.1.2 /tmp/pear/download/v8js-master && cd /tmp/pear/download/v8js-master &&\
 phpize && ./configure --with-php-config=/usr/bin/php-config --with-v8js=/opt/libv8-7.5 && make install && cd -
 

web/app/libs/uoj-html-lib.php

@@ -512,18 +512,26 @@ function echoSubmissionContent($submission, $requirement) {
 				case 'C++':
 				case 'C++11':
 				case 'C++17':
+				case 'C++20':
 				case 'C++98':
-					$sh_class = 'sh_cpp';
+				case 'C++03':
+					$sh_class = 'sh_cpp language-cpp';
 					break;
 				case 'Python2':
+				case 'Python2.7':
 				case 'Python3':
-					$sh_class = 'sh_python';
+					$sh_class = 'sh_python language-python';
+					break;
+				case 'Java8':
+				case 'Java11':
+				case 'Java17':
+					$sh_class = 'sh_java language-java';
 					break;
 				case 'C':
-					$sh_class = 'sh_c';
+					$sh_class = 'sh_c language-c';
 					break;
 				case 'Pascal':
-					$sh_class = 'sh_pascal';
+					$sh_class = 'sh_pascal language-pascal';
 					break;
 				default:
 					$sh_class = '';

web/app/libs/uoj-judger-lib.php

@@ -1,6 +1,6 @@
 <?php
 	global $uojSupportedLanguages, $uojMainJudgerWorkPath;
-	$uojSupportedLanguages = array('C', 'C++', 'C++11', 'C++17', 'C++98', 'Pascal', 'Python2', 'Python3');
+	$uojSupportedLanguages = array('C', 'C++', 'C++98', 'C++03', 'C++11', 'C++17', 'C++20', 'Pascal', 'Python2.7', 'Python3', 'Java8', 'Java11', 'Java17');
 	$uojMainJudgerWorkPath = "/opt/uoj/judger/uoj_judger";
 	
 	function authenticateJudger() {

web/app/views/page-header.php

@@ -212,8 +212,8 @@
 		<?php endif ?>
 
 		<?php if (isset($REQUIRE_LIB['hljs'])): ?>
-		<?= HTML::css_link('/css/highlightjs.github.min.css') ?>
+		<?= HTML::css_link('/css/highlightjs.github.min.css?v=11.6.0-20221005') ?>
-		<?= HTML::js_src('/js/highlightjs.min.js') ?>
+		<?= HTML::js_src('/js/highlightjs.min.js?v=11.6.0-20221005') ?>
 		<script>$(document).ready(function() { hljs.highlightAll();	});</script>
 		<?php endif ?>
 		

web/install.sh

@@ -18,11 +18,12 @@ getAptPackage(){
     # Update apt sources and install
     export DEBIAN_FRONTEND=noninteractive
     dpkg -s gnupg 2>/dev/null || (apt-get update && apt-get install -y gnupg)
-    echo "deb http://ppa.launchpad.net/stesie/libv8/ubuntu bionic main" | tee /etc/apt/sources.list.d/stesie-libv8.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys D858A0DF
+	echo "deb http://ppa.launchpad.net/stesie/libv8/ubuntu bionic main" | tee /etc/apt/sources.list.d/stesie-libv8.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1A10946ED858A0DF
-    apt-get update && apt-get install -y git vim ntp zip unzip curl wget apache2 libapache2-mod-xsendfile libapache2-mod-php php php-dev php-pear php-zip php-mysql php-mbstring php-gd php-intl php-xsl g++ make re2c libv8-7.5-dev libyaml-dev
+	echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu jammy main" | tee /etc/apt/sources.list.d/ondrej-php.list && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4F4EA0AAE5267A6C
+    apt-get update --allow-unauthenticated
+    apt-get install -y --allow-unauthenticated -o Dpkg::Options::="--force-overwrite" libv8 php7.4 php7.4-yaml php7.4-xml php7.4-dev php7.4-zip php7.4-mysql php7.4-mbstring php7.4-gd libseccomp-dev git vim ntp zip unzip curl wget libapache2-mod-xsendfile mysql-server php-pear cmake fp-compiler re2c libv8-7.5-dev libyaml-dev python2.7 python3.10 python3-requests openjdk-8-jdk openjdk-11-jdk openjdk-17-jdk
     # Install PHP extensions
-    yes | pecl install yaml
+    git clone https://github.com/phpv8/v8js.git --depth=1 -b 2.1.2 /tmp/pear/download/v8js-master && cd /tmp/pear/download/v8js-master
-    git clone https://github.com/phpv8/v8js.git --depth=1 -b 4c026f3fb291797c109adcabda6aeba6491fe44f /tmp/pear/download/v8js-master && cd /tmp/pear/download/v8js-master
     phpize && ./configure --with-php-config=/usr/bin/php-config --with-v8js=/opt/libv8-7.5 && make install && cd -
 }
 
@@ -77,7 +78,7 @@ UOJEOF
 #define UOJ_JUDGER_PYTHON3_VERSION "3.6"
 #define UOJ_JUDGER_FPC_VERSION "3.0.4"
 UOJEOF
-    make runner -j$(($(nproc) + 1)) && cd /opt/uoj/web
+    make all -j$(($(nproc) + 1)) && cd /opt/uoj/web
 }
 
 dockerInitProgress() {

web/js/highlightjs.min.js

@@ -444,4 +444,41 @@ aliases:["dpr","dfm","pas","pascal"],case_insensitive:!0,keywords:r,
 illegal:/"|\$[G-Zg-z]|\/\*|<\/|\|/,contains:[n,i,e.NUMBER_MODE,{
 className:"number",relevance:0,variants:[{begin:"\\$[0-9A-Fa-f]+"},{
 begin:"&[0-7]+"},{begin:"%[01]+"}]},s,c,t].concat(a)}}})()
-;hljs.registerLanguage("delphi",e)})();
+;hljs.registerLanguage("delphi",e)})();/*! `java` grammar compiled for Highlight.js 11.6.0 */
+(()=>{var e=(()=>{"use strict"
+;var e="\\.([0-9](_*[0-9])*)",a="[0-9a-fA-F](_*[0-9a-fA-F])*",n={
+className:"number",variants:[{
+begin:`(\\b([0-9](_*[0-9])*)((${e})|\\.)?|(${e}))[eE][+-]?([0-9](_*[0-9])*)[fFdD]?\\b`
+},{begin:`\\b([0-9](_*[0-9])*)((${e})[fFdD]?\\b|\\.([fFdD]\\b)?)`},{
+begin:`(${e})[fFdD]?\\b`},{begin:"\\b([0-9](_*[0-9])*)[fFdD]\\b"},{
+begin:`\\b0[xX]((${a})\\.?|(${a})?\\.(${a}))[pP][+-]?([0-9](_*[0-9])*)[fFdD]?\\b`
+},{begin:"\\b(0|[1-9](_*[0-9])*)[lL]?\\b"},{begin:`\\b0[xX](${a})[lL]?\\b`},{
+begin:"\\b0(_*[0-7])*[lL]?\\b"},{begin:"\\b0[bB][01](_*[01])*[lL]?\\b"}],
+relevance:0};function s(e,a,n){return-1===n?"":e.replace(a,(t=>s(e,a,n-1)))}
+return e=>{
+const a=e.regex,t="[\xc0-\u02b8a-zA-Z_$][\xc0-\u02b8a-zA-Z_$0-9]*",i=t+s("(?:<"+t+"~~~(?:\\s*,\\s*"+t+"~~~)*>)?",/~~~/g,2),r={
+keyword:["synchronized","abstract","private","var","static","if","const ","for","while","strictfp","finally","protected","import","native","final","void","enum","else","break","transient","catch","instanceof","volatile","case","assert","package","default","public","try","switch","continue","throws","protected","public","private","module","requires","exports","do","sealed"],
+literal:["false","true","null"],
+type:["char","boolean","long","float","int","byte","short","double"],
+built_in:["super","this"]},l={className:"meta",begin:"@"+t,contains:[{
+begin:/\(/,end:/\)/,contains:["self"]}]},c={className:"params",begin:/\(/,
+end:/\)/,keywords:r,relevance:0,contains:[e.C_BLOCK_COMMENT_MODE],endsParent:!0}
+;return{name:"Java",aliases:["jsp"],keywords:r,illegal:/<\/|#/,
+contains:[e.COMMENT("/\\*\\*","\\*/",{relevance:0,contains:[{begin:/\w+@/,
+relevance:0},{className:"doctag",begin:"@[A-Za-z]+"}]}),{
+begin:/import java\.[a-z]+\./,keywords:"import",relevance:2
+},e.C_LINE_COMMENT_MODE,e.C_BLOCK_COMMENT_MODE,{begin:/"""/,end:/"""/,
+className:"string",contains:[e.BACKSLASH_ESCAPE]
+},e.APOS_STRING_MODE,e.QUOTE_STRING_MODE,{
+match:[/\b(?:class|interface|enum|extends|implements|new)/,/\s+/,t],className:{
+1:"keyword",3:"title.class"}},{match:/non-sealed/,scope:"keyword"},{
+begin:[a.concat(/(?!else)/,t),/\s+/,t,/\s+/,/=(?!=)/],className:{1:"type",
+3:"variable",5:"operator"}},{begin:[/record/,/\s+/,t],className:{1:"keyword",
+3:"title.class"},contains:[c,e.C_LINE_COMMENT_MODE,e.C_BLOCK_COMMENT_MODE]},{
+beginKeywords:"new throw return else",relevance:0},{
+begin:["(?:"+i+"\\s+)",e.UNDERSCORE_IDENT_RE,/\s*(?=\()/],className:{
+2:"title.function"},keywords:r,contains:[{className:"params",begin:/\(/,
+end:/\)/,keywords:r,relevance:0,
+contains:[l,e.APOS_STRING_MODE,e.QUOTE_STRING_MODE,n,e.C_BLOCK_COMMENT_MODE]
+},e.C_LINE_COMMENT_MODE,e.C_BLOCK_COMMENT_MODE]},n,l]}}})()
+;hljs.registerLanguage("java",e)})();

web/js/uoj.js

@@ -606,15 +606,22 @@ function get_codemirror_mode(lang) {
 		case 'C++':
 		case 'C++11':
 		case 'C++17':
+		case 'C++20':
 		case 'C++98':
+		case 'C++03':
 			return 'text/x-c++src';
 		case 'C':
 			return 'text/x-csrc';
 		case 'Python2':
+		case 'Python2.7':
 		case 'Python3':
 			return 'text/x-python';
 		case 'Pascal':
 			return 'text/x-pascal';
+		case 'Java8':
+		case 'Java11':
+		case 'Java17':
+			return 'text/x-java';
 		case 'text':
 			return 'text/plain';
 		default: