from __future__ import annotations import functools import importlib import json import multiprocessing import os import re import select import secrets import shutil import subprocess import sys import tempfile import time from pathlib import Path from typing import Any, Mapping from scoring.verification import executable_code_payload_contract _PYTHON_HARNESS_RUNNER = '\nimport builtins\nimport json\nimport os\nimport signal\nimport sys\nimport threading\nimport traceback\n\ndef run():\n trusted_exec = exec\n trusted_compile = compile\n trusted_json_loads = json.loads\n trusted_readline = sys.stdin.readline\n trusted_write = os.write\n trusted_traceback = traceback.print_exc\n builtins_before = dict(builtins.__dict__)\n signal_handlers_before = {\n number: signal.getsignal(number)\n for number in signal.valid_signals()\n if isinstance(number, int)\n }\n namespace = {"__name__": "candidate", "__file__": sys.argv[1]}\n try:\n with open(sys.argv[1], encoding="utf-8") as handle:\n candidate_code = trusted_compile(handle.read(), "candidate.py", "exec")\n trusted_exec(candidate_code, namespace)\n except BaseException:\n trusted_traceback()\n raise SystemExit(1)\n\n builtins_changed = (\n builtins.__dict__.keys() != builtins_before.keys()\n or any(\n builtins.__dict__[name] is not value\n for name, value in builtins_before.items()\n )\n )\n signal_changed = any(\n signal.getsignal(number) is not handler\n for number, handler in signal_handlers_before.items()\n )\n if (\n builtins_changed\n or signal_changed\n or sys.gettrace() is not None\n or sys.getprofile() is not None\n or len(threading.enumerate()) != 1\n ):\n raise SystemExit(91)\n\n trusted_write(1, ("__Q35_CANDIDATE_READY__" + sys.argv[2] + "\\n").encode())\n payload = trusted_json_loads(trusted_readline())\n harness_code = trusted_compile(payload["harness"], "hidden_tests.py", "exec")\n try:\n trusted_exec(harness_code, namespace)\n except BaseException:\n trusted_traceback()\n raise SystemExit(1)\n trusted_write(\n 1,\n ("__Q35_HARNESS_COMPLETE__" + payload["completion_token"] + "\\n").encode(),\n )\n\nrun()\n' def normalized_output(value: str) -> str: return '\n'.join((line.rstrip() for line in value.strip().splitlines())) def output_matches(actual: str, expected: str, checker: str) -> bool: if checker == 'tokens': return actual.split() == expected.split() return normalized_output(actual) == normalized_output(expected) def run_process(argv: list[str], *, cwd: Path, stdin: str, timeout: float) -> subprocess.CompletedProcess[str]: return subprocess.run(argv, cwd=cwd, input=stdin, text=True, capture_output=True, timeout=timeout, check=False) def run_python_harness(candidate: str, harness: str, *, cwd: Path, timeout: float) -> tuple[subprocess.CompletedProcess[str], bool]: code_path = cwd / 'candidate.py' code_path.write_text(candidate, encoding='utf-8') ready_token = secrets.token_hex(32) completion_token = secrets.token_hex(32) argv = [sys.executable, '-I', '-S', '-c', _PYTHON_HARNESS_RUNNER, str(code_path), ready_token] process = subprocess.Popen(argv, cwd=cwd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, bufsize=0) assert process.stdout is not None deadline = time.monotonic() + timeout stdout_prefix = bytearray() stderr_prefix = bytearray() pending = bytearray() streams = [process.stdout, process.stderr] ready_marker = f'__Q35_CANDIDATE_READY__{ready_token}'.encode() ready = False try: while not ready and process.stdout in streams: while b'\n' in pending: line, _, tail = pending.partition(b'\n') pending = bytearray(tail) if line.rstrip(b'\r') == ready_marker: ready = True break if ready: break remaining = deadline - time.monotonic() if remaining <= 0: raise subprocess.TimeoutExpired(argv, timeout) readable, _, _ = select.select(streams, [], [], remaining) if not readable: raise subprocess.TimeoutExpired(argv, timeout) for stream in readable: chunk = os.read(stream.fileno(), 65536) if not chunk: streams.remove(stream) elif stream is process.stdout: stdout_prefix.extend(chunk) pending.extend(chunk) else: stderr_prefix.extend(chunk) if len(stdout_prefix) > 1000000: process.kill() break remaining = deadline - time.monotonic() if remaining <= 0: raise subprocess.TimeoutExpired(argv, timeout) stdout, stderr = process.communicate(input=(json.dumps({'harness': harness, 'completion_token': completion_token}) + '\n').encode() if ready else None, timeout=remaining) except BaseException: process.kill() process.communicate() raise completed = subprocess.CompletedProcess(argv, process.returncode, (stdout_prefix + stdout).decode('utf-8', errors='replace'), (stderr_prefix + stderr).decode('utf-8', errors='replace')) marker = f'__Q35_HARNESS_COMPLETE__{completion_token}' return (completed, ready and marker in completed.stdout.splitlines()) def select_runtime(language: str, code_path: Path, root: Path) -> tuple[list[str], dict[str, Any]]: if language in {'python', 'py', 'python3', ''}: return ([sys.executable, '-I', str(code_path)], {'language': 'python'}) if language in {'cpp', 'c++', 'cxx', 'cc'}: compiler = shutil.which('g++') if compiler is None: raise FileNotFoundError('g++ is unavailable') executable = root / 'candidate' compiled = subprocess.run([compiler, '-O2', '-std=c++17', str(code_path), '-o', str(executable)], cwd=root, text=True, capture_output=True, timeout=30, check=False) if compiled.returncode != 0: return ([], {'language': 'cpp', 'compile_failed': True}) return ([str(executable)], {'language': 'cpp', 'compile_failed': False}) raise ValueError(f'unsupported language: {language}') @functools.lru_cache(maxsize=1) def livecodebench_runtime(): runner = Path(__file__).resolve().parents[1] / 'third_party/official_evaluators/LiveCodeBench' sys.path.insert(0, str(runner)) benchmark = importlib.import_module('lcb_runner.benchmarks.code_generation') evaluation = importlib.import_module('lcb_runner.evaluation.compute_code_generation_metrics') return (benchmark.CodeGenerationProblem, functools.partial(check_livecodebench_correctness, evaluation._temp_run)) def check_livecodebench_correctness(run_test, sample, generation, *, timeout, debug=False): cases = len(json.loads(sample['input_output'])['inputs']) budget = (timeout + 1) * cases + 5 with multiprocessing.Manager() as manager: results, metadata = (manager.list(), manager.list()) process = multiprocessing.Process(target=run_test, args=(sample, generation, debug, results, metadata, timeout)) process.start() try: process.join(timeout=budget) global_timeout = process.is_alive() if global_timeout: process.kill() process.join() facts = {'exitcode': process.exitcode, 'global_timeout': global_timeout, 'global_timeout_seconds': budget, 'missing_result': not bool(results), 'missing_metadata': not bool(metadata), 'scorer_error': bool(process.exitcode and (not global_timeout))} return (results[0] if results else None, metadata[0] if metadata else None, facts) finally: if process.is_alive(): process.kill() process.join() process.close() def run_livecodebench(candidate: str, payload: Mapping[str, Any], timeout: float) -> dict[str, Any]: problem_class, check_correctness = livecodebench_runtime() raw = json.loads(Path(str(payload['lcb_payload_path'])).read_text(encoding='utf-8')) problem = problem_class(**raw) started = time.perf_counter() results, metadata, facts = check_correctness(problem.get_evaluation_sample(), candidate, timeout=timeout, debug=False) passed = [bool(value == True) for value in results or []] first_failed = next((index for index, value in enumerate(passed) if not value), None) if facts['global_timeout']: verdict = 'FAIL' elif facts['missing_result'] or facts['missing_metadata'] or facts['scorer_error']: verdict = 'UNCERTAIN' else: verdict = 'PASS' if passed and all(passed) else 'FAIL' return {'verdict': verdict, 'details': {**facts, 'language': 'python', 'livecodebench': True, 'cases': len(passed), 'first_failed_case': first_failed, 'elapsed_seconds': time.perf_counter() - started, 'official_metadata_type': type(metadata).__name__}} def verify(request: Mapping[str, Any]) -> dict[str, Any]: code = request.get('candidate') if not isinstance(code, str) or not code.strip(): return {'verdict': 'FAIL', 'details': 'empty code submission'} payload = request.get('tests') if 'tests' in request else request.get('verifier_payload') contract = executable_code_payload_contract(payload, language=request.get('language')) if not contract['eligible']: return {'verdict': 'UNCERTAIN', 'details': {'method': 'code_payload_contract_rejected', 'reason': contract['reason']}} tests = {'cases': payload} if isinstance(payload, list) else payload assert isinstance(tests, Mapping) timeout = min(max(int(float(tests.get('time_limit_s', 2))), 1), 30) checker = str(tests.get('checker', 'exact')).strip().lower() language = str(request.get('language') or tests.get('language') or 'python').strip().lower() if contract['mode'] == 'livecodebench': return run_livecodebench(code, tests, timeout) with tempfile.TemporaryDirectory(prefix='edgerock-code-verifier-') as temporary: root = Path(temporary) suffix = '.cpp' if language in {'cpp', 'c++', 'cxx', 'cc'} else '.py' code_path = root / f'candidate{suffix}' source = code if contract['mode'] == 'python_harness': harness = tests['python_harness'] assert isinstance(harness, str) try: completed, harness_completed = run_python_harness(code, harness, cwd=root, timeout=timeout) except subprocess.TimeoutExpired: return {'verdict': 'FAIL', 'details': {'language': 'python', 'harness': True, 'timeout': True}} return {'verdict': 'PASS' if completed.returncode == 0 and harness_completed else 'UNCERTAIN' if 'ModuleNotFoundError:' in completed.stderr else 'FAIL', 'details': {'language': 'python', 'harness': True, 'harness_completed': harness_completed, 'returncode': completed.returncode, 'missing_modules': re.findall("ModuleNotFoundError: No module named '([^']+)'", completed.stderr)}} code_path.write_text(source, encoding='utf-8') try: argv, runtime = select_runtime(language, code_path, root) except (FileNotFoundError, ValueError, subprocess.TimeoutExpired) as exc: return {'verdict': 'UNCERTAIN', 'details': f'runtime unavailable: {type(exc).__name__}: {exc}'} if runtime.get('compile_failed'): return {'verdict': 'FAIL', 'details': runtime} cases = tests.get('cases') assert isinstance(cases, list) and cases case_results = [] for index, case in enumerate(cases): assert isinstance(case, Mapping) stdin = str(case.get('stdin', '')) expected = case.get('stdout', case.get('expected_stdout')) assert isinstance(expected, str) try: completed = run_process(argv, cwd=root, stdin=stdin, timeout=timeout) except subprocess.TimeoutExpired: return {'verdict': 'FAIL', 'details': {**runtime, 'case': index, 'timeout': True}} passed = completed.returncode == 0 and output_matches(completed.stdout, expected, checker) case_results.append({'index': index, 'passed': passed, 'returncode': completed.returncode}) if not passed: return {'verdict': 'FAIL', 'details': {**runtime, 'cases': case_results}} return {'verdict': 'PASS', 'details': {**runtime, 'cases': case_results}} def main() -> int: result_stream = os.fdopen(os.dup(sys.stdout.fileno()), 'w', buffering=1) os.dup2(sys.stderr.fileno(), sys.stdout.fileno()) if '--jsonl-worker' in sys.argv[1:]: for line in sys.stdin: try: result = verify(json.loads(line)) except Exception as exc: result = {'verdict': 'UNCERTAIN', 'details': {'method': 'code_worker_fail_closed', 'error': f'{type(exc).__name__}: {str(exc)[:1000]}'}} print(json.dumps(result, ensure_ascii=False, sort_keys=True), file=result_stream, flush=True) return 0 print(json.dumps(verify(json.load(sys.stdin)), ensure_ascii=False, sort_keys=True), file=result_stream, flush=True) return 0 if __name__ == '__main__': raise SystemExit(main())