Store references to pickle.dumps and pickle.loads in _PyXI_state_t
so they are looked up only once per interpreter lifetime, avoiding
repeated PyImport_ImportModuleAttrString calls on every cross-interpreter
data transfer via pickle fallback.
Benchmarks show 1.7x-3.3x speedup for InterpreterPoolExecutor
when transferring mutable types (list, dict) through XIData.
The gc_stats struct contains ring buffers of gc_generation_stats
entries (11 young + 3×2 old on default builds). Embedding it inline
in _gc_runtime_state, which is itself inline in PyInterpreterState,
pushed fields like _gil.locked and threads.head to offsets beyond
what out-of-process profilers and debuggers can reasonably read in
a single buffer (e.g. offset 9384 for _gil.locked vs an 8 KiB read
buffer).
Heap-allocate generation_stats via PyMem_RawCalloc in _PyGC_Init and
free it in _PyGC_Fini. This shrinks PyInterpreterState by ~1.6 KiB
and keeps the GIL, thread-list, and other frequently-inspected fields
at stable, low offsets.
Revert "GH-126910: Make `_Py_get_machine_stack_pointer` return the stack pointer (#147945)"
This reverts commit 255026d9ee,
which broke a tier-1 buildbot.
* Make _Py_get_machine_stack_pointer return the stack pointer (or close to it), not the frame pointer
* Make ``_Py_ReachedRecursionLimit`` inline again
* Remove ``_Py_MakeRecCheck`` relacing its use with ``_Py_ReachedRecursionLimit``
* Move stack swtiching check into ``_Py_CheckRecursiveCall``
- Add Py_TARGET_ABI3T macro.
- Add ".abi3t.so" to importlib EXTENSION_SUFFIXES.
- Remove ".abi3.so" from importlib EXTENSION_SUFFIXES on Free Threading.
- Adjust tests
This is part of the implementation for PEP-803.
Detailed documentation to come later.
Co-authored-by: Nathan Goldbaum <nathan.goldbaum@gmail.com>
Accepted range for the bytes_per_sep argument of bytes.hex(),
bytearray.hex(), memoryview.hex(), and binascii.b2a_hex()
is now increased, so passing sys.maxsize and -sys.maxsize is now
valid.
If _PyErr_SetKeyError() is called with an exception set, it now
replaces the current exception with KeyError (as expected), instead
of setting a SystemError or failing with a fatal error (in debug
mode).
Rename from _Py_INTERNAL_ABI_SLOT to _Py_ABI_SLOT
and define the macro using _PyABIInfo_DEFAULT.
Use the ABI slot in stdlib extension modules to enable running
a check of ABI version compatibility.
_tkinter, _tracemalloc and readline don't use the slots, hence they need
explicit handling.
Co-authored-by: Victor Stinner <vstinner@python.org>
