Add a PID to names of POSIX shared memory objects to allow
running multiprocessing tests (test_multiprocessing_fork,
test_multiprocessing_spawn, etc) in parallel.
On Unix, if the sem_clockwait() function is available in the C
library (glibc 2.30 and newer), the threading.Lock.acquire() method
now uses the monotonic clock (time.CLOCK_MONOTONIC) for the timeout,
rather than using the system clock (time.CLOCK_REALTIME), to not be
affected by system clock changes.
configure now checks if the sem_clockwait() function is available.
Eric Snow [Fri, 1 Oct 2021 00:38:52 +0000 (18:38 -0600)]
bpo-45020: Add more test cases for frozen modules. (gh-28664)
I've added a number of test-only modules. Some of those cases are covered by the recently frozen stdlib modules (and some will be once we add encodings back in). However, I figured we'd play it safe by having a set of modules guaranteed to be there during tests.
* Work correctly if an additional fresh module imports other
additional fresh module which imports a blocked module.
* Raises ImportError if the specified module cannot be imported
while all additional fresh modules are successfully imported.
* Support blocking packages.
* Always restore the import state of fresh and blocked modules
and their submodules.
* Fix test_decimal and test_xml_etree which depended on an undesired
side effect of import_fresh_module().
Victor Stinner [Thu, 30 Sep 2021 08:16:51 +0000 (10:16 +0200)]
bpo-41710: PyThread_acquire_lock_timed() clamps the timout (GH-28643)
PyThread_acquire_lock_timed() now clamps the timeout into the
[_PyTime_MIN; _PyTime_MAX] range (_PyTime_t type) if it is too large,
rather than calling Py_FatalError() which aborts the process.
PyThread_acquire_lock_timed() no longer uses
MICROSECONDS_TO_TIMESPEC() to compute sem_timedwait() argument, but
_PyTime_GetSystemClock() and _PyTime_AsTimespec_truncate().
Fix _thread.TIMEOUT_MAX value on Windows: the maximum timeout is
0x7FFFFFFF milliseconds (around 24.9 days), not 0xFFFFFFFF
milliseconds (around 49.7 days).
Set PY_TIMEOUT_MAX to 0x7FFFFFFF milliseconds, rather than 0xFFFFFFFF
milliseconds.
Eric Snow [Wed, 29 Sep 2021 18:55:35 +0000 (12:55 -0600)]
bpo-45020: Do not freeze <pkg>/__init__.py twice. (gh-28635)
Currently we're freezing the __init__.py twice, duplicating the built data unnecessarily With this change we do it once. There is no change in runtime behavior.
Jack DeVries [Wed, 29 Sep 2021 09:25:48 +0000 (05:25 -0400)]
bpo-39039: tarfile raises descriptive exception from zlib.error (GH-27766)
* during tarfile parsing, a zlib error indicates invalid data
* tarfile.open now raises a descriptive exception from the zlib error
* this makes it clear to the user that they may be trying to open a
corrupted tar file
Eric Snow [Tue, 28 Sep 2021 18:18:28 +0000 (12:18 -0600)]
bpo-45211: Remember the stdlib dir during startup. (gh-28586)
During runtime startup we figure out the stdlib dir but currently throw that information away. This change preserves it and exposes it via PyConfig.stdlib_dir, _Py_GetStdlibDir(), and sys._stdlib_dir.
Victor Stinner [Mon, 27 Sep 2021 21:09:00 +0000 (23:09 +0200)]
bpo-1596321: Fix threading._shutdown() for the main thread (GH-28549)
Fix the threading._shutdown() function when the threading module was
imported first from a thread different than the main thread: no
longer log an error at Python exit.
Fix a race condition in the Thread.join() method of the threading
module. If the function is interrupted by a signal and the signal
handler raises an exception, make sure that the thread remains in a
consistent state to prevent a deadlock.
py_win_perf_counter_frequency() no longer checks for
QueryPerformanceFrequency() failure. According to the
QueryPerformanceFrequency() documentation, the function can no longer
fails since Windows XP.
Antony Lee [Fri, 24 Sep 2021 15:22:49 +0000 (17:22 +0200)]
bpo-44019: Implement operator.call(). (GH-27888)
Having `operator.call(obj, arg)` mean `type(obj).__call__(obj, arg)` is
consistent with the other dunder operators. The semantics with `*args,
**kwargs` then follow naturally from the single-arg semantics.
Sean Leavey [Thu, 23 Sep 2021 14:47:10 +0000 (16:47 +0200)]
Fix legacy logging module URL (GH-28528)
The URL listed in the `logging` docs for the original `logging` module leads to a 404. I managed to find the new location for the page and updated the URL.
Victor Stinner [Thu, 23 Sep 2021 09:37:39 +0000 (11:37 +0200)]
bpo-41137: Reorganize What's New in Python 3.11 (GH-28518)
* Merge the two Removed sections.
* Move "Build Changes" at the end, before "C API Changes".
* Move the pdb change in Porting to Python 3.11.
* Move C API new features in their section.
Victor Stinner [Wed, 22 Sep 2021 14:09:30 +0000 (16:09 +0200)]
bpo-21302: time.sleep() uses waitable timer on Windows (GH-28483)
On Windows, time.sleep() now uses a waitable timer which has a
resolution of 100 ns (10^-7 sec). Previously, it had a solution of 1
ms (10^-3 sec).
* On Windows, time.sleep() now calls PyErr_CheckSignals() before
resetting the SIGINT event.
* Add _PyTime_As100Nanoseconds() function.
* Complete and update time.sleep() documentation.
bpo-45229: Remove test_main in many tests (GH-28405)
Instead of explicitly enumerate test classes for run_unittest()
use the unittest ability to discover tests. This also makes these
tests discoverable and runnable with unittest.
load_tests() can be used for dynamic generating tests and adding
doctests. setUpModule(), tearDownModule() and addModuleCleanup()
can be used for running code before and after all module tests.
bpo-30856: Update TestResult early, without buffering in _Outcome (GH-28180)
TestResult methods addFailure(), addError(), addSkip() and
addSubTest() are now called immediately after raising an exception
in test or finishing a subtest. Previously they were called only
after finishing the test clean up.
bpo-36674: Honour the skipping decorators in TestCase.debug() (GH-28446)
unittest.TestCase.debug() raises now a SkipTest if the class or
the test method are decorated with the skipping decorator.
Previously it only raised a SkipTest if the test method was decorated
with other decorator in addition to the skipping decorator, or
if SkipTest was explicitly raised in the test or setup methods.