fix: Resolve signal blocking issue

Author: wudidapaopao

programs/local/LocalServer.cpp

@@ -481,7 +481,7 @@ try
 
     StackTrace::setShowAddresses(server_settings.show_addresses_in_stack_traces);
 
-    setupSignalHandler();
+    // setupSignalHandler();
 
     std::cout << std::fixed << std::setprecision(3);
     std::cerr << std::fixed << std::setprecision(3);

tests/test_signal_handler.py

@@ -0,0 +1,41 @@
+#!python3
+
+import unittest
+import os
+import signal
+import threading
+import time
+from chdb import session
+
+class TestSignalHandler(unittest.TestCase):
+    def setUp(self) -> None:
+        self.sess = session.Session()
+        self.signal_received = False
+        return super().setUp()
+
+    def tearDown(self) -> None:
+        self.sess.close()
+        return super().tearDown()
+
+    def background_sender(self):
+        time.sleep(5)
+        print("send signal")
+        os.kill(os.getpid(), signal.SIGINT)
+
+    def test_signal_response(self):
+        sender_thread = threading.Thread(target=self.background_sender, daemon=True)
+        sender_thread.start()
+
+        start_time = time.time()
+        try:
+            while time.time() - start_time < 10:
+                time.sleep(0.1)
+                self.sess.query("SELECT 1")
+        except KeyboardInterrupt:
+            print("receive signal")
+            self.signal_received = True
+
+        self.assertTrue(self.signal_received)
+
+if __name__ == "__main__":
+    unittest.main()