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[3.12] gh-110656: Fix logging test_post_fork_child_no_deadlock() if ASAN (GH-110657) (#110664)

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gh-110656: Fix logging test_post_fork_child_no_deadlock() if ASAN (GH-110657)

Skip test_post_fork_child_no_deadlock() if Python is built with ASAN.

Add support.HAVE_ASAN_FORK_BUG.
(cherry picked from commit f901f56313)

Co-authored-by: Victor Stinner <vstinner@python.org>
This commit is contained in:
Miss Islington (bot) 2023-10-11 03:31:49 +02:00 • committed by GitHub
parent dcd47e506d
commit 55448a5b14
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4 changed files with 15 additions and 10 deletions
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4
Lib/test/_test_multiprocessing.py
View file

@ -78,10 +78,10 @@ except ImportError:
msvcrt = None msvcrt = None
if support.check_sanitizer(address=True): if support.HAVE_ASAN_FORK_BUG:
# gh-89363: Skip multiprocessing tests if Python is built with ASAN to # gh-89363: Skip multiprocessing tests if Python is built with ASAN to
# work around a libasan race condition: dead lock in pthread_create(). # work around a libasan race condition: dead lock in pthread_create().
raise unittest.SkipTest("libasan has a pthread_create() dead lock") raise unittest.SkipTest("libasan has a pthread_create() dead lock related to thread+fork")
def latin(s): def latin(s):

4
Lib/test/support/__init__.py
View file

@ -428,6 +428,10 @@ def skip_if_sanitizer(reason=None, *, address=False, memory=False, ub=False):
skip = check_sanitizer(address=address, memory=memory, ub=ub) skip = check_sanitizer(address=address, memory=memory, ub=ub)
return unittest.skipIf(skip, reason) return unittest.skipIf(skip, reason)
# gh-89363: True if fork() can hang if Python is built with Address Sanitizer
# (ASAN): libasan race condition, dead lock in pthread_create().
HAVE_ASAN_FORK_BUG = check_sanitizer(address=True)
def system_must_validate_cert(f): def system_must_validate_cert(f):
"""Skip the test on TLS certificate validation failures.""" """Skip the test on TLS certificate validation failures."""

8
Lib/test/test_logging.py
View file

@ -76,6 +76,13 @@ except ImportError:
pass pass
# gh-89363: Skip fork() test if Python is built with Address Sanitizer (ASAN)
# to work around a libasan race condition, dead lock in pthread_create().
skip_if_asan_fork = unittest.skipIf(
support.HAVE_ASAN_FORK_BUG,
"libasan has a pthread_create() dead lock related to thread+fork")
class BaseTest(unittest.TestCase): class BaseTest(unittest.TestCase):
"""Base class for logging tests.""" """Base class for logging tests."""
@ -730,6 +737,7 @@ class HandlerTest(BaseTest):
# register_at_fork mechanism is also present and used. # register_at_fork mechanism is also present and used.
@support.requires_fork() @support.requires_fork()
@threading_helper.requires_working_threading() @threading_helper.requires_working_threading()
@skip_if_asan_fork
def test_post_fork_child_no_deadlock(self): def test_post_fork_child_no_deadlock(self):
"""Ensure child logging locks are not held; bpo-6721 & bpo-36533.""" """Ensure child logging locks are not held; bpo-6721 & bpo-36533."""
class _OurHandler(logging.Handler): class _OurHandler(logging.Handler):

9
Lib/test/test_threading.py
View file

@ -35,19 +35,12 @@ threading_helper.requires_working_threading(module=True)
platforms_to_skip = ('netbsd5', 'hp-ux11') platforms_to_skip = ('netbsd5', 'hp-ux11')
# gh-89363: Skip fork() test if Python is built with Address Sanitizer (ASAN)
# to work around a libasan race condition, dead lock in pthread_create().
skip_if_asan_fork = support.skip_if_sanitizer(
"libasan has a pthread_create() dead lock",
address=True)
def skip_unless_reliable_fork(test): def skip_unless_reliable_fork(test):
if not support.has_fork_support: if not support.has_fork_support:
return unittest.skip("requires working os.fork()")(test) return unittest.skip("requires working os.fork()")(test)
if sys.platform in platforms_to_skip: if sys.platform in platforms_to_skip:
return unittest.skip("due to known OS bug related to thread+fork")(test) return unittest.skip("due to known OS bug related to thread+fork")(test)
if support.check_sanitizer(address=True): if support.HAVE_ASAN_FORK_BUG:
return unittest.skip("libasan has a pthread_create() dead lock related to thread+fork")(test) return unittest.skip("libasan has a pthread_create() dead lock related to thread+fork")(test)
return test return test