There is a race condition between PyMem_SetAllocator() and
PyMem_RawMalloc()/PyMem_RawFree(). While PyMem_SetAllocator() write
is protected by a lock, PyMem_RawMalloc()/PyMem_RawFree() reads are
not protected by a lock. PyMem_RawMalloc()/PyMem_RawFree() can be
called with an old context and the new function pointer.
On a release build, it's not an issue since the context is not used.
On a debug build, the debug hooks use the context and so can crash.
This reduces the import time of the `csv` module by up to five times,
by importing `re` on demand.
In particular, the `re` module is no more implicitly exposed as `csv.re`.
* gh-128916: Do not set `SO_REUSEPORT` on non-`AF_INET*` sockets
Do not attempt to set ``SO_REUSEPORT`` on sockets of address familifies other
than ``AF_INET`` and ``AF_INET6``, as it is meaningless with these address
families, and the call with fail with Linux kernel 6.12.9 and newer.
* Apply suggestions from code review
Co-authored-by: Vinay Sajip <vinay_sajip@yahoo.co.uk>
---------
Co-authored-by: Vinay Sajip <vinay_sajip@yahoo.co.uk>
In the free threading build, the per thread reference counting uses a
unique id for some objects to index into the local reference count
table. Use 0 instead of -1 to indicate that the id is not assigned. This
avoids bugs where zero-initialized heap type objects look like they have
a unique id assigned.
Implement set_name() with SetThreadDescription() and _get_name() with
GetThreadDescription(). If SetThreadDescription() or
GetThreadDescription() is not available in kernelbase.dll, delete the
method when the _thread module is imported.
Truncate the thread name to 32766 characters.
Co-authored-by: Eryk Sun <eryksun@gmail.com>
tracemalloc_alloc(), tracemalloc_realloc(), tracemalloc_free(),
_PyTraceMalloc_TraceRef() and _PyTraceMalloc_GetMemory() now check
'tracemalloc_config.tracing' after calling TABLES_LOCK().
_PyTraceMalloc_TraceRef() now always returns 0.
Suggest TraversableResources as the alternative for ResourceLoader.
Previously, ResourceReader was the suggested alternative, but it
is itself deprecated in favour of TraversableResources.
* Use TABLES_LOCK() to protect 'tracemalloc_config.tracing'.
* Hold TABLES_LOCK() longer while accessing tables.
* tracemalloc_realloc() and tracemalloc_free() no longer
remove the trace on reentrant call.
* _PyTraceMalloc_Stop() unregisters _PyTraceMalloc_TraceRef().
* _PyTraceMalloc_GetTraces() sets the reentrant flag.
* tracemalloc_clear_traces_unlocked() sets the reentrant flag.
* Fix a deprecation warning for using importlib.resources.abc.ResourceReader.
* Fix an import warning when importing readline (if it has not yet been imported).
Modifying locale-related environment variables in `Lib/test/test_builtin.py`,
`Lib/test/test_io.py` and `Lib/test/test_locale.py` is now achieved by using
an `EnvironmentVarGuard` context instead of an explicit `try-finally` block.
