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f89b1ac | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | from __future__ import annotations
import json
import math
import os
import signal
import subprocess
import sys
import tempfile
from dataclasses import dataclass
DEFAULT_ADDRESS_SPACE_BYTES = 512 * 1024 * 1024
DEFAULT_FILE_BYTES = 2 * 1024 * 1024
DEFAULT_OPEN_FILES = 64
DEFAULT_PROCESSES = 32
_RUNNER_BOOTSTRAP = r"""
import json
import runpy
import sys
try:
import resource
except ImportError: # pragma: no cover
resource = None
def _set_limit(name, value):
if resource is None or not hasattr(resource, name):
return
limit = int(value)
try:
_, current_hard = resource.getrlimit(getattr(resource, name))
soft = min(limit, current_hard) if current_hard >= 0 else limit
resource.setrlimit(getattr(resource, name), (soft, current_hard))
except (OSError, ValueError):
return
config = json.loads(sys.argv[1])
_set_limit("RLIMIT_CORE", 0)
_set_limit("RLIMIT_CPU", config["cpu_seconds"])
_set_limit("RLIMIT_FSIZE", config["file_bytes"])
_set_limit("RLIMIT_NOFILE", config["open_files"])
_set_limit("RLIMIT_AS", config["address_space_bytes"])
_set_limit("RLIMIT_NPROC", config["processes"])
mode = config["mode"]
if mode == "script":
script = sys.argv[2]
sys.argv = sys.argv[2:]
runpy.run_path(script, run_name="__main__")
elif mode == "code":
sys.argv = ["-c"]
exec(config["code"], {"__name__": "__main__"})
else: # pragma: no cover
raise SystemExit(f"Unsupported execution mode: {mode}")
"""
@dataclass(frozen=True)
class PythonRunResult:
returncode: int
stdout: str
stderr: str
timed_out: bool = False
def _safe_env(workspace_dir: str) -> dict[str, str]:
return {
"HOME": workspace_dir,
"TMPDIR": workspace_dir,
"LANG": "C.UTF-8",
"LC_ALL": "C.UTF-8",
"PATH": "",
"PYTHONDONTWRITEBYTECODE": "1",
"PYTHONHASHSEED": "0",
"PYTHONIOENCODING": "utf-8",
"PYTHONNOUSERSITE": "1",
}
def _limit_config(timeout_s: float) -> dict[str, int]:
return {
"cpu_seconds": max(1, int(math.ceil(timeout_s)) + 1),
"file_bytes": DEFAULT_FILE_BYTES,
"open_files": DEFAULT_OPEN_FILES,
"address_space_bytes": DEFAULT_ADDRESS_SPACE_BYTES,
"processes": DEFAULT_PROCESSES,
}
def _read_limited_text(handle, limit: int) -> str:
handle.seek(0)
data = handle.read(limit + 1)
if isinstance(data, bytes):
return data.decode("utf-8", errors="replace")[:limit]
return str(data)[:limit]
def _terminate_process(proc: subprocess.Popen[bytes]) -> None:
if proc.poll() is not None:
return
if os.name != "nt":
try:
os.killpg(proc.pid, signal.SIGKILL)
return
except ProcessLookupError:
return
proc.kill()
def _run_python_command(
config: dict[str, object],
*,
cwd: str,
argv: list[str],
timeout_s: float,
stdout_limit: int,
stderr_limit: int,
) -> PythonRunResult:
command = [
sys.executable,
"-I",
"-B",
"-c",
_RUNNER_BOOTSTRAP,
json.dumps(config, ensure_ascii=True),
*argv,
]
start_new_session = os.name != "nt"
with tempfile.TemporaryFile() as stdout_file, tempfile.TemporaryFile() as stderr_file:
proc = subprocess.Popen(
command,
cwd=cwd,
env=_safe_env(cwd),
stdin=subprocess.DEVNULL,
stdout=stdout_file,
stderr=stderr_file,
start_new_session=start_new_session,
)
timed_out = False
try:
proc.wait(timeout=timeout_s)
except subprocess.TimeoutExpired:
timed_out = True
_terminate_process(proc)
proc.wait()
return PythonRunResult(
returncode=proc.returncode if proc.returncode is not None else -1,
stdout=_read_limited_text(stdout_file, stdout_limit),
stderr=_read_limited_text(stderr_file, stderr_limit),
timed_out=timed_out,
)
def run_python_script(
script_name: str,
*,
cwd: str,
args: list[str],
timeout_s: float,
stdout_limit: int,
stderr_limit: int,
) -> PythonRunResult:
config = {"mode": "script", **_limit_config(timeout_s)}
return _run_python_command(
config,
cwd=cwd,
argv=[script_name, *args],
timeout_s=timeout_s,
stdout_limit=stdout_limit,
stderr_limit=stderr_limit,
)
def run_python_code(
code: str,
*,
cwd: str,
timeout_s: float,
stdout_limit: int,
stderr_limit: int,
) -> PythonRunResult:
config = {"mode": "code", "code": code, **_limit_config(timeout_s)}
return _run_python_command(
config,
cwd=cwd,
argv=[],
timeout_s=timeout_s,
stdout_limit=stdout_limit,
stderr_limit=stderr_limit,
)
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