gh-117398: Add multiphase support to _datetime#119373

erlend-aasland

Issue: Isolate the _datetime extension module #117398

erlend-aasland

@ericsnowcurrently: this works nice for a single test run, but obviously fails if we're running ref-leak tests (the reload reinitializes the singletons in the global state).

erlend-aasland

One way to fix reloading is to use an initialization guard.

tonybaloney

thank you for doing this!

This reverts commit 863ecd7.

ericsnowcurrently

LGTM

ncoghlan

@ericsnowcurrently @erlend-aasland Are we sure this won't segfault in the case I described in #117398 (comment) ? (acquire a capsule reference, reload the module, use the capsule with the reloaded module)

The addition of the no_rerun guard on the C API test case makes me more concerned about that risk than I already was.

erlend-aasland

This is an incomplete first step of a series of multiple PRs. Eric and I propose to handle the encapsulated C API last. The scenario you describe will probably segfault for now.

erlend-aasland

FTR, the test guard was added because running with test -R : leaks.

erlend-aasland

Actually, the scenario you are describing is what happens when you do a ref-leak run of the C API test: the _testcapimodule reuses the pointer to the encapsulted C API, but the _datetime module is reloaded (and its exec function is run) every time. I didn't check coverage (yet), but so far this only causes leaks.

This is minimal support. Subinterpreters are not supported yet. That will be addressed in a later change. (cherry picked from commit 3e8b609) Co-authored-by: Erlend E. Aasland <erlend@python.org> Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>

bedevere-app

GH-119636 is a backport of this pull request to the 3.13 branch.

bedevere-bot

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 FreeBSD 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime
test.test_concurrent_futures.test_process_pool

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/threading.py", line 1039, in _bootstrap_inner
    self.run()
    ~~~~~~~~^^
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/concurrent/futures/process.py", line 354, in run
    p = self.processes.pop(result_item.exit_pid)
KeyError: 26371
Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/multiprocessing/forkserver.py", line 277, in main
    code = _serve_one(child_r, fds,
                      unused_fds,
                      old_handlers)
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/multiprocessing/forkserver.py", line 317, in _serve_one
    code = spawn._main(child_r, parent_sentinel)
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/multiprocessing/spawn.py", line 132, in _main
    self = reduction.pickle.load(from_parent)
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/multiprocessing/synchronize.py", line 115, in __setstate__
    self._semlock = _multiprocessing.SemLock._rebuild(*state)
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory
Timeout (0:20:00)!
Thread 0x000000083361b300 (most recent call first):
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/threading.py", line 359 in wait
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/multiprocessing/queues.py", line 249 in _feed
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/threading.py", line 990 in run
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/threading.py", line 1039 in _bootstrap_inner
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/threading.py", line 1010 in _bootstrap


Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.ware-freebsd/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot x86-64 MacOS Intel NoGIL 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/Users/ec2-user/buildbot/buildarea/3.13.itamaro-macos-intel-aws.nogil/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Hi! The buildbot AMD64 Debian root 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime

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Traceback (most recent call last):
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

bedevere-bot

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Failed tests:

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test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "D:\buildarea\3.13.bolen-windows10\build\Lib\test\datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL7-x86_64.lto/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL7 LTO 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.13.edelsohn-rhel-z.lto/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x RHEL8 LTO 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.13.edelsohn-rhel8-z.lto/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 RHEL8 LTO + PGO 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64.lto-pgo/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-fips-x86_64.no-builtin-hashes-except-blake2/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 RHEL8 LTO 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64.lto/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

bedevere-bot

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/srv/buildbot/buildarea/3.13.bolen-ubuntu/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-x86_64/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

test_datetime

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==

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Traceback (most recent call last):
  File "/Users/ec2-user/buildbot/buildarea/3.13.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

bedevere-bot

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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-aarch64.lto-pgo/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

bedevere-bot

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot aarch64 RHEL8 LTO 3.13 has failed when building commit d58ebf0.

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Failed tests:

test_datetime

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test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-aarch64.lto/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-x86_64.clang/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

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Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-aarch64/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

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==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-aarch64.clang/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

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Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.13.edelsohn-fedora-z.clang/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

…ythongh-119373) (pythongh-119636)" This reverts commit d58ebf0.

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Failed tests:

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  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-x86_64.lto-pgo/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

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Failed tests:

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Summary of the results of the build (if available):

==

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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-x86_64.lto/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

bedevere-bot

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora LTO + PGO 3.13 has failed when building commit d58ebf0.

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Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/1511/builds/54) and take a look at the build logs.
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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.13.edelsohn-fedora-z.lto-pgo/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

…me (#119639) Revert "[3.13] gh-117398: Add multiphase support to _datetime (gh-119373) (gh-119636)" This reverts commit d58ebf0.

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Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
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Failed tests:

test_datetime

Failed subtests:

test_utc_alias - test.datetimetester.TestModule_Fast.test_utc_alias

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-aarch64.lto-pgo/build/Lib/test/datetimetester.py", line 98, in test_utc_alias
    self.assertIs(UTC, timezone.utc)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
AssertionError: datetime.timezone(datetime.timedelta(0)) is not datetime.timezone.utc

vstinner

This change introduced a reference leak: see issue gh-119655.

pythongh-117398: Add multiphase support to _datetime

7211eb1

erlend-aasland requested a review from ericsnowcurrently May 22, 2024 03:09

bedevere-app Bot mentioned this pull request May 22, 2024

Isolate the _datetime extension module #117398

Closed

erlend-aasland added skip news needs backport to 3.13 bugs and security fixes labels May 22, 2024

erlend-aasland added 3 commits May 22, 2024 10:02

Kinda fix the C API tests

863ecd7

Revert "Kinda fix the C API tests" …

8de6317

This reverts commit 863ecd7.

Skip encapsulated C API tests on reruns

0c091eb

ericsnowcurrently approved these changes May 22, 2024

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bedevere-app Bot added the awaiting merge label May 22, 2024

ericsnowcurrently marked this pull request as ready for review May 27, 2024 19:56

ericsnowcurrently requested review from abalkin and pganssle as code owners May 27, 2024 19:56

bedevere-app Bot added awaiting core review and removed awaiting merge labels May 27, 2024

Copy no_rerun().

90ff7d6

ericsnowcurrently merged commit 3e8b609 into python:main May 27, 2024

bedevere-app Bot removed the awaiting core review label May 27, 2024

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bedevere-app Bot removed the needs backport to 3.13 bugs and security fixes label May 27, 2024

erlend-aasland deleted the isolate-datetime/multiphase-init branch May 27, 2024 22:04

ericsnowcurrently added a commit to ericsnowcurrently/cpython that referenced this pull request May 28, 2024

Revert "[3.13] pythongh-117398: Add multiphase support to _datetime (p… …

e96963a

…ythongh-119373) (pythongh-119636)" This reverts commit d58ebf0.

JelleZijlstra mentioned this pull request May 28, 2024

backport a9a74da 3.13 #119642

Closed

sobolevn mentioned this pull request May 28, 2024

Refactor: move no_rerun from test_import and datetimetester to test.support #119659

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