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gh-127119: Faster check for small ints in long_dealloc (GH-127620)

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Pieter Eendebak 2025-01-29 16:22:18 +01:00 • committed by GitHub
parent 3a974e39d5
commit a29221675e
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6 changed files with 48 additions and 45 deletions
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15
Modules/_testcapi/immortal.c
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@ -1,5 +1,8 @@
#include "parts.h"
#define Py_BUILD_CORE
#include "internal/pycore_long.h" // IMMORTALITY_BIT_MASK
int verify_immortality(PyObject *object)
{
assert(_Py_IsImmortal(object));
@ -26,7 +29,17 @@ static PyObject *
test_immortal_small_ints(PyObject *self, PyObject *Py_UNUSED(ignored))
{
for (int i = -5; i <= 256; i++) {
assert(verify_immortality(PyLong_FromLong(i)));
PyObject *obj = PyLong_FromLong(i);
assert(verify_immortality(obj));
int has_int_immortal_bit = ((PyLongObject *)obj)->long_value.lv_tag & IMMORTALITY_BIT_MASK;
assert(has_int_immortal_bit);
}
for (int i = 257; i <= 260; i++) {
PyObject *obj = PyLong_FromLong(i);
assert(obj);
int has_int_immortal_bit = ((PyLongObject *)obj)->long_value.lv_tag & IMMORTALITY_BIT_MASK;
assert(!has_int_immortal_bit);
Py_DECREF(obj);
}
Py_RETURN_NONE;
}