File size: 4,203 Bytes
d40299b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | """Standalone trusted entry point; copied into each separate verifier image.
No Repo2RLEnv installation is needed to grade an exported task. Submitted Python
runs as an unprivileged user; this parent owns the result parser and reward file.
"""
from __future__ import annotations
import importlib.util
import json
import os
import signal
import stat
import subprocess
import sys
import tempfile
from pathlib import Path
def main() -> None:
directory = Path("/tests")
parser_spec = importlib.util.spec_from_file_location(
"test_results", directory / "test_results.py"
)
parser = importlib.util.module_from_spec(parser_spec)
sys.modules[parser_spec.name] = parser
parser_spec.loader.exec_module(parser)
contract = json.loads((directory / "contract.json").read_text())
logs = Path("/logs/verifier")
logs.mkdir(parents=True, exist_ok=True)
logs.chmod(0o755)
reward = logs / "reward.txt"
reward.write_text("0\n")
reward.chmod(0o644)
for relative in contract["submitted_files"]:
path = Path("/workspace") / relative
# Artifact uploads are data. Refuse link traversal and special files
# before the child imports any learner-controlled code.
for component in (path, *path.parents):
if component.is_symlink():
raise ValueError("Submitted source contains a symlink")
if not stat.S_ISREG(path.stat().st_mode) or path.stat().st_size > 8 * 1024 * 1024:
raise ValueError("Submitted source is not a bounded regular file")
os.chown(path, 0, 0)
path.chmod(0o644)
with tempfile.TemporaryDirectory(prefix="r2e-grade-") as temporary:
working = Path(temporary)
os.chown(working, 1001, 1001)
working.chmod(0o700)
report = working / "results.xml"
command = [
"/usr/local/bin/python",
"-I",
"/tests/test_driver.py",
*contract["test_paths"],
"-q",
"--tb=short",
"-p",
"no:cacheprovider",
f"--junitxml={report}",
]
with (logs / "stdout.txt").open("w") as stdout, (logs / "stderr.txt").open("w") as stderr:
process = subprocess.Popen(
command,
cwd="/workspace",
stdout=stdout,
stderr=stderr,
user=1001,
group=1001,
extra_groups=[],
start_new_session=True,
env={
"PATH": "/usr/local/bin:/usr/bin:/bin",
"HOME": temporary,
"PYTHONDONTWRITEBYTECODE": "1",
"PYTEST_DISABLE_PLUGIN_AUTOLOAD": "1",
},
)
try:
code = process.wait(timeout=contract["timeout_sec"])
finally:
# Terminate descendants too: they must not keep modifying the
# child-owned report while the trusted parent checks it.
try:
os.killpg(process.pid, signal.SIGKILL)
except ProcessLookupError:
pass
process.wait()
if report.is_symlink() or not report.is_file() or report.stat().st_size > 16 * 1024 * 1024:
(logs / "result.json").write_text(
json.dumps({"passed": False, "returncode": code, "reason": "invalid_report"})
)
return
text = report.read_text()
(logs / "results.xml").write_text(text)
try:
parsed = parser.parse_junit(text, returncode=code)
except ValueError as exc:
(logs / "result.json").write_text(
json.dumps({"passed": False, "returncode": code, "reason": str(exc)})
)
return
expected = set(contract["expected_passes"])
passed = code == 0 and bool(expected) and parsed.passed == expected
(logs / "result.json").write_text(
json.dumps({"passed": passed, "returncode": code, "statuses": parsed.statuses})
)
reward.write_text("1\n" if passed else "0\n")
if __name__ == "__main__":
main()
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