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Title: Issue 11768: signal_handler() is not reentrant: deadlock in Py_AddPendingCall() - Python tracker

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This issue has been migrated to GitHub: https://github.com/python/cpython/issues/55977 https://github.com/python/cpython/issues/55977
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signal_reentrant.patchhttps://bugs.python.org/file21702/signal_reentrant.patch
reviewhttps://bugs.python.org/review/11768/#ps2434
signal_versionadded.patchhttps://bugs.python.org/file21703/signal_versionadded.patch
msg132993https://bugs.python.org/issue11768#msg132993
(view)https://bugs.python.org/msg132993
test/test_threadsignals.pyhttps://github.com/python/cpython/blob/main/Lib/test/test_threadsignals.py#L46
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L387
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L442
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L494
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L105
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L67
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L105
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L67
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1078
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1166
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1192
test/test_threadsignals.pyhttps://github.com/python/cpython/blob/main/Lib/test/test_threadsignals.py#L210
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L1032
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L826
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L650
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L1607
http://www.python.org/dev/buildbot/all/builders/x86%20Tiger%203.x/builds/2289/steps/test/logs/stdiohttp://www.python.org/dev/buildbot/all/builders/x86%20Tiger%203.x/builds/2289/steps/test/logs/stdio
http://www.python.org/dev/buildbot/all/builders/PPC%20Tiger%203.x/builds/1700/steps/test/logs/stdiohttp://www.python.org/dev/buildbot/all/builders/PPC%20Tiger%203.x/builds/1700/steps/test/logs/stdio
#11753https://bugs.python.org/issue11753
#11755https://bugs.python.org/issue11755
#11223https://bugs.python.org/issue11223
msg132995https://bugs.python.org/issue11768#msg132995
(view)https://bugs.python.org/msg132995
d14eac872a46https://hg.python.org/lookup/d14eac872a46
#11768https://bugs.python.org/issue11768
http://hg.python.org/cpython/rev/d14eac872a46http://hg.python.org/cpython/rev/d14eac872a46
msg133257https://bugs.python.org/issue11768#msg133257
(view)https://bugs.python.org/msg133257
test/test_threadsignals.pyhttps://github.com/python/cpython/blob/main/Lib/test/test_threadsignals.py#L53
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L387
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L442
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L494
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L105
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L67
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L105
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L67
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1078
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1166
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1192
test/test_threadsignals.pyhttps://github.com/python/cpython/blob/main/Lib/test/test_threadsignals.py#L218
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L1032
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L826
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L650
test/regrtest.pyhttps://github.com/python/cpython/blob/main/Lib/test/regrtest.py#L1607
http://www.python.org/dev/buildbot/all/builders/AMD64%20Leopard%203.x/builds/1132/steps/test/logs/stdiohttp://www.python.org/dev/buildbot/all/builders/AMD64%20Leopard%203.x/builds/1132/steps/test/logs/stdio
d14eac872a46https://hg.python.org/lookup/d14eac872a46
msg133267https://bugs.python.org/issue11768#msg133267
(view)https://bugs.python.org/msg133267
test/test_threadsignals.pyhttps://github.com/python/cpython/blob/main/Lib/test/test_threadsignals.py#L55
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L387
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L442
unittest/case.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/case.py#L494
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L105
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L67
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L105
unittest/suite.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/suite.py#L67
unittest/runner.pyhttps://github.com/python/cpython/blob/main/Lib/unittest/runner.py#L168
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1166
test/support.pyhttps://github.com/python/cpython/blob/main/Lib/test/support.py#L1192
test/test_threadsignals.pyhttps://github.com/python/cpython/blob/main/Lib/test/test_threadsignals.py#L221
Lib/test/regrtest.pyhttps://github.com/python/cpython/blob/master/Lib/test/regrtest.py
Lib/test/regrtest.pyhttps://github.com/python/cpython/blob/master/Lib/test/regrtest.py
Lib/test/regrtest.pyhttps://github.com/python/cpython/blob/master/Lib/test/regrtest.py
Lib/test/regrtest.pyhttps://github.com/python/cpython/blob/master/Lib/test/regrtest.py
4326952960https://hg.python.org/lookup/4326952960
4326952960https://hg.python.org/lookup/4326952960
msg133268https://bugs.python.org/issue11768#msg133268
(view)https://bugs.python.org/msg133268
msg133941https://bugs.python.org/issue11768#msg133941
(view)https://bugs.python.org/msg133941
Python/thread_pthread.h:450https://github.com/python/cpython/blob/master/Python/thread_pthread.h#L450
Python/thread_pthread.h:531https://github.com/python/cpython/blob/master/Python/thread_pthread.h#L531
Python/ceval.c:509https://github.com/python/cpython/blob/master/Python/ceval.c#L509
Python/thread_pthread.h:450https://github.com/python/cpython/blob/master/Python/thread_pthread.h#L450
Python/thread_pthread.h:531https://github.com/python/cpython/blob/master/Python/thread_pthread.h#L531
Python/ceval.c:509https://github.com/python/cpython/blob/master/Python/ceval.c#L509
Python/thread_pthread.h:476https://github.com/python/cpython/blob/master/Python/thread_pthread.h#L476
Objects/methodobject.c:84https://github.com/python/cpython/blob/master/Objects/methodobject.c#L84
Python/ceval.c:3859https://github.com/python/cpython/blob/master/Python/ceval.c#L3859
Python/ceval.c:2657https://github.com/python/cpython/blob/master/Python/ceval.c#L2657
msg133942https://bugs.python.org/issue11768#msg133942
(view)https://bugs.python.org/msg133942
msg133943https://bugs.python.org/issue11768#msg133943
(view)https://bugs.python.org/msg133943
msg133957https://bugs.python.org/issue11768#msg133957
(view)https://bugs.python.org/msg133957
msg133958https://bugs.python.org/issue11768#msg133958
(view)https://bugs.python.org/msg133958
msg133959https://bugs.python.org/issue11768#msg133959
(view)https://bugs.python.org/msg133959
msg133960https://bugs.python.org/issue11768#msg133960
(view)https://bugs.python.org/msg133960
#1583https://bugs.python.org/issue1583
msg133961https://bugs.python.org/issue11768#msg133961
(view)https://bugs.python.org/msg133961
msg133964https://bugs.python.org/issue11768#msg133964
(view)https://bugs.python.org/msg133964
msg133970https://bugs.python.org/issue11768#msg133970
(view)https://bugs.python.org/msg133970
319f7af9ee5ehttps://hg.python.org/lookup/319f7af9ee5e
#11768https://bugs.python.org/issue11768
http://hg.python.org/cpython/rev/319f7af9ee5ehttp://hg.python.org/cpython/rev/319f7af9ee5e
28ab8c6ad8f9https://hg.python.org/lookup/28ab8c6ad8f9
#11768https://bugs.python.org/issue11768
http://hg.python.org/cpython/rev/28ab8c6ad8f9http://hg.python.org/cpython/rev/28ab8c6ad8f9
fdcbc8453304https://hg.python.org/lookup/fdcbc8453304
#11768https://bugs.python.org/issue11768
http://hg.python.org/cpython/rev/fdcbc8453304http://hg.python.org/cpython/rev/fdcbc8453304
msg133971https://bugs.python.org/issue11768#msg133971
(view)https://bugs.python.org/msg133971
7d355c2ff3d4https://hg.python.org/lookup/7d355c2ff3d4
#11768https://bugs.python.org/issue11768
http://hg.python.org/cpython/rev/7d355c2ff3d4http://hg.python.org/cpython/rev/7d355c2ff3d4
ebd080593351https://hg.python.org/lookup/ebd080593351
#11768https://bugs.python.org/issue11768
http://hg.python.org/cpython/rev/ebd080593351http://hg.python.org/cpython/rev/ebd080593351
msg133973https://bugs.python.org/issue11768#msg133973
(view)https://bugs.python.org/msg133973
msg133973https://bugs.python.org/msg133973
msg133971https://bugs.python.org/msg133971
msg133970https://bugs.python.org/msg133970
msg133964https://bugs.python.org/msg133964
signal_versionadded.patchhttps://bugs.python.org/file21703
msg133961https://bugs.python.org/msg133961
signal_reentrant.patchhttps://bugs.python.org/file21702
patchhttps://bugs.python.org/keyword2
msg133960https://bugs.python.org/msg133960
msg133959https://bugs.python.org/msg133959
msg133958https://bugs.python.org/msg133958
msg133957https://bugs.python.org/msg133957
pitrouhttps://bugs.python.org/user2040
msg133943https://bugs.python.org/msg133943
msg133942https://bugs.python.org/msg133942
msg133941https://bugs.python.org/msg133941
msg133268https://bugs.python.org/msg133268
msg133267https://bugs.python.org/msg133267
msg133257https://bugs.python.org/msg133257
python-devhttps://bugs.python.org/user13902
msg132995https://bugs.python.org/msg132995
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