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gh-100240: Use a consistent implementation for freelists (#121934)

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This combines and updates our freelist handling to use a consistent
implementation. Objects in the freelist are linked together using the
first word of memory block.

If configured with freelists disabled, these operations are essentially
no-ops.
This commit is contained in:
Sam Gross 2024-07-22 12:08:27 -04:00 • committed by GitHub
parent 2408a8a22b
commit 5716cc3529
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27 changed files with 295 additions and 705 deletions
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3
Python/pylifecycle.c
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@ -9,6 +9,7 @@
#include "pycore_dict.h" // _PyDict_Fini()
#include "pycore_exceptions.h" // _PyExc_InitTypes()
#include "pycore_fileutils.h" // _Py_ResetForceASCII()
#include "pycore_freelist.h" // _PyObject_ClearFreeLists()
#include "pycore_floatobject.h" // _PyFloat_InitTypes()
#include "pycore_global_objects_fini_generated.h" // "_PyStaticObjects_CheckRefcnt()
#include "pycore_import.h" // _PyImport_BootstrapImp()
@ -1843,7 +1844,7 @@ finalize_interp_types(PyInterpreterState *interp)
#ifndef Py_GIL_DISABLED
// With Py_GIL_DISABLED:
// the freelists for the current thread state have already been cleared.
struct _Py_object_freelists *freelists = _Py_object_freelists_GET();
struct _Py_freelists *freelists = _Py_freelists_GET();
_PyObject_ClearFreeLists(freelists, 1);
#endif