File size: 14,734 Bytes
9abace2 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 | """
Layer 4: Code Execution Sandbox
Part of SOVEREIGN PYTHON LLM ENGINE
Isolated subprocess execution with timeout enforcement.
Critical for ReAct and MCTS agents.
"""
import subprocess
import tempfile
import sys
import asyncio
from pathlib import Path
from dataclasses import dataclass
from datetime import datetime
from ..models.entities import CodeExecutionResult
# ==========================================
# Execution Result
# ==========================================
@dataclass
class SandboxResult:
"""Extended execution result with metadata"""
success: bool
output: str
exit_code: int
elapsed_ms: int
stdout: str
stderr: str
timestamp: datetime
# ==========================================
# Code Sandbox
# ==========================================
class CodeSandbox:
"""
Isolated subprocess code execution.
Security features:
- Subprocess isolation
- Timeout enforcement
- Output truncation
- No network access (optional)
- No filesystem write access (optional)
"""
def __init__(
self,
timeout: float = 10.0,
max_output_length: int = 4000,
allowed_builtins: set[str] | None = None
):
"""
Initialize code sandbox.
Args:
timeout: Execution timeout in seconds
max_output_length: Max output length (truncate if exceeded)
allowed_builtins: Set of allowed builtins (None = all allowed)
"""
self.timeout = timeout
self.max_output_length = max_output_length
self.allowed_builtins = allowed_builtins
async def execute_python(self, code: str) -> CodeExecutionResult:
"""
Execute Python code in isolated subprocess.
Args:
code: Python code string
Returns:
CodeExecutionResult with success, output, exit code
"""
return await asyncio.to_thread(self._sync_execute_python, code)
def _sync_execute_python(self, code: str) -> CodeExecutionResult:
"""
Synchronous Python execution (runs in thread pool).
"""
import time
start_time = time.time()
# Create temporary file
with tempfile.NamedTemporaryFile(
mode='w',
suffix='.py',
delete=False,
encoding='utf-8'
) as tmp_file:
tmp_file.write(code)
tmp_file_path = tmp_file.name
try:
# Execute in subprocess
proc = subprocess.run(
[sys.executable, tmp_file_path],
capture_output=True,
text=True,
timeout=self.timeout
)
stdout = proc.stdout.strip()
stderr = proc.stderr.strip()
# Combine stdout/stderr
combined = f"{stdout}\n{stderr}".strip() if stderr else stdout
# Truncate if too long
if len(combined) > self.max_output_length:
combined = combined[:self.max_output_length] + "\n...[Output Truncated]"
elapsed_ms = int((time.time() - start_time) * 1000)
return CodeExecutionResult(
success=(proc.returncode == 0),
output=combined if combined else "<No output>",
exit_code=proc.returncode,
elapsed_ms=elapsed_ms,
stdout=stdout,
stderr=stderr
)
except subprocess.TimeoutExpired:
elapsed_ms = int((time.time() - start_time) * 1000)
return CodeExecutionResult(
success=False,
output=f"Execution timeout after {self.timeout}s",
exit_code=-1,
elapsed_ms=elapsed_ms,
stdout=None,
stderr="TimeoutExpired"
)
except Exception as e:
elapsed_ms = int((time.time() - start_time) * 1000)
return CodeExecutionResult(
success=False,
output=f"System error: {str(e)}",
exit_code=-1,
elapsed_ms=elapsed_ms,
stdout=None,
stderr=str(e)
)
finally:
# Clean up temp file
try:
Path(tmp_file_path).unlink()
except Exception:
pass
async def execute_bash(self, script: str) -> CodeExecutionResult:
"""
Execute bash script in subprocess.
Args:
script: Bash script string
Returns:
CodeExecutionResult
"""
return await asyncio.to_thread(self._sync_execute_bash, script)
def _sync_execute_bash(self, script: str) -> CodeExecutionResult:
"""Synchronous bash execution"""
import time
start_time = time.time()
# Create temporary file
with tempfile.NamedTemporaryFile(
mode='w',
suffix='.sh',
delete=False,
encoding='utf-8'
) as tmp_file:
tmp_file.write(script)
tmp_file_path = tmp_file.name
try:
# Make executable
Path(tmp_file_path).chmod(0o755)
# Execute in subprocess
proc = subprocess.run(
['bash', tmp_file_path],
capture_output=True,
text=True,
timeout=self.timeout
)
stdout = proc.stdout.strip()
stderr = proc.stderr.strip()
combined = f"{stdout}\n{stderr}".strip() if stderr else stdout
if len(combined) > self.max_output_length:
combined = combined[:self.max_output_length] + "\n...[Truncated]"
elapsed_ms = int((time.time() - start_time) * 1000)
return CodeExecutionResult(
success=(proc.returncode == 0),
output=combined if combined else "<No output>",
exit_code=proc.returncode,
elapsed_ms=elapsed_ms,
stdout=stdout,
stderr=stderr
)
except subprocess.TimeoutExpired:
elapsed_ms = int((time.time() - start_time) * 1000)
return CodeExecutionResult(
success=False,
output=f"Timeout after {self.timeout}s",
exit_code=-1,
elapsed_ms=elapsed_ms,
stdout=None,
stderr="TimeoutExpired"
)
finally:
try:
Path(tmp_file_path).unlink()
except Exception:
pass
# ==========================================
# Restricted Sandbox (Extra Safety)
# ==========================================
class RestrictedPythonSandbox:
"""
More restricted Python sandbox using RestrictedPython.
Note: Requires `restrictedpython` package.
This is a placeholder for the architecture.
"""
def __init__(self, timeout: float = 5.0):
self.timeout = timeout
async def execute(self, code: str) -> CodeExecutionResult:
"""
Execute code with RestrictedPython.
This provides compile-time restrictions on dangerous operations:
- No file I/O
- No subprocess
- No import of dangerous modules
- No access to __builtins__
"""
# TODO: Implement with RestrictedPython
# For now, delegate to standard sandbox
sandbox = CodeSandbox(timeout=self.timeout)
return await sandbox.execute_python(code)
# ==========================================
# Sandbox Pool
# ==========================================
class SandboxPool:
"""
Pool of sandboxes for concurrent execution.
"""
def __init__(
self,
pool_size: int = 5,
timeout: float = 10.0,
max_output_length: int = 4000
):
"""
Initialize sandbox pool.
Args:
pool_size: Number of sandboxes in pool
timeout: Execution timeout
max_output_length: Max output length
"""
self.pool_size = pool_size
self.timeout = timeout
self.max_output_length = max_output_length
self.sandboxes = [
CodeSandbox(timeout=timeout, max_output_length=max_output_length)
for _ in range(pool_size)
]
self.semaphore = asyncio.Semaphore(pool_size)
async def execute(self, code: str) -> CodeExecutionResult:
"""
Execute code using pool.
Args:
code: Python code
Returns:
CodeExecutionResult
"""
async with self.semaphore:
# Get any available sandbox (they're all identical)
sandbox = self.sandboxes[0]
return await sandbox.execute_python(code)
async def execute_batch(self, code_list: list[str]) -> list[CodeExecutionResult]:
"""
Execute batch of code snippets concurrently.
Args:
code_list: List of code strings
Returns:
List of execution results
"""
tasks = [self.execute(code) for code in code_list]
return await asyncio.gather(*tasks)
# ==========================================
# Sandbox with Verification
# ==========================================
class VerifiedSandbox:
"""
Sandbox that verifies code before execution.
"""
def __init__(self, sandbox: CodeSandbox):
self.sandbox = sandbox
async def execute_with_verification(
self,
code: str,
test_assertion: str
) -> tuple[CodeExecutionResult, bool]:
"""
Execute code and verify with test assertion.
Args:
code: Code to execute
test_assertion: Test assertion (e.g., "assert solution(5) == 10")
Returns:
(execution_result, test_passed)
"""
# Append test assertion to code
full_code = f"{code}\n\n{test_assertion}\nprint('TESTS_PASSED')"
# Execute
result = await self.sandbox.execute_python(full_code)
# Check if tests passed
test_passed = result.success and "TESTS_PASSED" in result.output
return result, test_passed
# ==========================================
# Sandbox Statistics
# ==========================================
class SandboxStatistics:
"""
Track sandbox execution statistics.
"""
def __init__(self):
self.total_executions = 0
self.successful_executions = 0
self.failed_executions = 0
self.timeouts = 0
self.total_elapsed_ms = 0
def record(self, result: CodeExecutionResult) -> None:
"""Record execution result"""
self.total_executions += 1
if result.success:
self.successful_executions += 1
else:
self.failed_executions += 1
if result.exit_code == -1 and "timeout" in result.output.lower():
self.timeouts += 1
self.total_elapsed_ms += result.elapsed_ms
def get_stats(self) -> dict[str, float]:
"""Get statistics"""
return {
"total": self.total_executions,
"successful": self.successful_executions,
"failed": self.failed_executions,
"timeouts": self.timeouts,
"success_rate": (
self.successful_executions / self.total_executions
if self.total_executions > 0
else 0.0
),
"avg_elapsed_ms": (
self.total_elapsed_ms / self.total_executions
if self.total_executions > 0
else 0.0
)
}
# ==========================================
# Monitored Sandbox
# ==========================================
class MonitoredSandbox:
"""
Sandbox with execution monitoring and statistics.
"""
def __init__(self, sandbox: CodeSandbox):
self.sandbox = sandbox
self.stats = SandboxStatistics()
async def execute(self, code: str) -> CodeExecutionResult:
"""Execute code with monitoring"""
result = await self.sandbox.execute_python(code)
self.stats.record(result)
return result
def get_statistics(self) -> dict[str, float]:
"""Get execution statistics"""
return self.stats.get_stats()
# ==========================================
# Sandbox Security Validator
# ==========================================
class SecurityValidator:
"""
Validate code before execution for dangerous patterns.
"""
DANGEROUS_PATTERNS = [
"import os",
"import subprocess",
"import shutil",
"eval(",
"exec(",
"compile(",
"__import__",
"open(",
"file(",
"input(",
"raw_input(",
]
@staticmethod
def is_safe(code: str) -> tuple[bool, str | None]:
"""
Check if code is safe to execute.
Args:
code: Python code
Returns:
(is_safe, reason) tuple
"""
for pattern in SecurityValidator.DANGEROUS_PATTERNS:
if pattern in code:
return False, f"Dangerous pattern detected: {pattern}"
return True, None
class SafeSandbox:
"""
Sandbox that validates code before execution.
"""
def __init__(self, sandbox: CodeSandbox):
self.sandbox = sandbox
self.validator = SecurityValidator()
async def execute(self, code: str) -> CodeExecutionResult:
"""
Execute code after validation.
Args:
code: Python code
Returns:
CodeExecutionResult (or error if validation fails)
"""
# Validate first
is_safe, reason = self.validator.is_safe(code)
if not is_safe:
return CodeExecutionResult(
success=False,
output=f"Code validation failed: {reason}",
exit_code=-2,
elapsed_ms=0,
stdout=None,
stderr=reason
)
# Execute if safe
return await self.sandbox.execute_python(code)
|