Issue #25122: try to debug test_eintr hang on FreeBSD

* Add verbose mode to test_eintr
* Always enable verbose mode in test_eintr
* Use faulthandler.dump_traceback_later() with a timeout of 15 minutes in
  eintr_tester.py

1 files changed, 11 insertions, 1 deletions

diff --git a/Lib/test/test_eintr.py b/Lib/test/test_eintr.py
index 111ead3..1d1d16e 100644
--- a/Lib/test/test_eintr.py
+++ b/Lib/test/test_eintr.py
@@ -1,5 +1,7 @@
 import os
 import signal
+import subprocess
+import sys
 import unittest
 
 from test import support
@@ -14,7 +16,15 @@ class EINTRTests(unittest.TestCase):
         # Run the tester in a sub-process, to make sure there is only one
         # thread (for reliable signal delivery).
         tester = support.findfile("eintr_tester.py", subdir="eintrdata")
-        script_helper.assert_python_ok(tester)
+
+        # FIXME: Issue #25122, always run in verbose mode to debug hang on FreeBSD
+        if True: #support.verbose:
+            args = [sys.executable, tester]
+            with subprocess.Popen(args, stdout=sys.stderr) as proc:
+                exitcode = proc.wait()
+            self.assertEqual(exitcode, 0)
+        else:
+            script_helper.assert_python_ok(tester)
 
 
 if __name__ == "__main__":