Windows: Raise EOFError during process.recv when stdout closes

If the receiving thread terminates while we're waiting for data to arrive we'd be waiting endlessly. Raise EOFError when .recv()ing on a process with stdout closed and no more data queued up from the receiver thread.

Author: peace-maker

pwnlib/tubes/process.py

@@ -767,9 +767,13 @@ def can_recv_raw(self, timeout):
 
         if IS_WINDOWS:
             with self.countdown(timeout=timeout):
-                while self.timeout and self._read_queue.empty():
+                while self.timeout and self._read_queue.empty() and self._read_thread.is_alive():
                     time.sleep(0.01)
-                return not self._read_queue.empty()
+                if not self._read_queue.empty():
+                    return True
+                if not self._read_thread.is_alive():
+                    raise EOFError
+                return False
 
         try:
             if timeout is None: