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Code Issues Projects Releases Packages Wiki Activity Actions 13

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

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Skip test_post_fork_child_no_deadlock() if Python is built with ASAN.

Add support.HAVE_ASAN_FORK_BUG.
This commit is contained in:
Victor Stinner 2023-10-11 02:57:53 +02:00 • committed by GitHub
parent 7ca4aafa0e
commit f901f56313
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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
if support.check_sanitizer(address=True):
if support.HAVE_ASAN_FORK_BUG:
# gh-89363: Skip multiprocessing tests if Python is built with ASAN to
# 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):

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

@ -429,6 +429,10 @@ def skip_if_sanitizer(reason=None, *, address=False, memory=False, ub=False):
skip = check_sanitizer(address=address, memory=memory, ub=ub)
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 set_sanitizer_env_var(env, option):
for name in ('ASAN_OPTIONS', 'MSAN_OPTIONS', 'UBSAN_OPTIONS'):

8
Lib/test/test_logging.py
View file

@ -76,6 +76,13 @@ except ImportError:
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):
"""Base class for logging tests."""
@ -724,6 +731,7 @@ class HandlerTest(BaseTest):
# register_at_fork mechanism is also present and used.
@support.requires_fork()
@threading_helper.requires_working_threading()
@skip_if_asan_fork
def test_post_fork_child_no_deadlock(self):
"""Ensure child logging locks are not held; bpo-6721 & bpo-36533."""
class _OurHandler(logging.Handler):

9
Lib/test/test_threading.py
View file

@ -40,19 +40,12 @@ threading_helper.requires_working_threading(module=True)
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):
if not support.has_fork_support:
return unittest.skip("requires working os.fork()")(test)
if sys.platform in platforms_to_skip:
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 test