DEVTOOLS-7854 [devtools/ya/test] Dump python traceback in case of timeout for import_tests

ref:27d3e422ea1b49c6ca8672fe75f7404214043550

1 files changed, 13 insertions, 0 deletions

diff --git a/library/python/testing/import_test/import_test.py b/library/python/testing/import_test/import_test.py
index 3e3b7234ef..5290ae3cae 100644
--- a/library/python/testing/import_test/import_test.py
+++ b/library/python/testing/import_test/import_test.py
@@ -4,6 +4,7 @@ import os
 import re
 import sys
 import time
+import signal
 import traceback
 
 import __res
@@ -100,6 +101,18 @@ test_imports = check_imports
 def main():
     skip_names = sys.argv[1:]
 
+    try:
+        import faulthandler
+    except ImportError:
+        faulthandler = None
+
+    if faulthandler:
+        # Dump python backtrace in case of any errors
+        faulthandler.enable()
+        if hasattr(signal, "SIGUSR2"):
+            # SIGUSR2 is used by test_tool to teardown tests
+            faulthandler.register(signal.SIGUSR2, chain=True)
+
     os.environ['Y_PYTHON_IMPORT_TEST'] = ''
 
     # We should initialize Django before importing any applications