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GH-95150: Use position and exception tables for code hashing and equality (GH-95509)

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Brandt Bucher 2022-08-01 11:02:56 -07:00 • committed by GitHub
parent a95e60db74
commit c7e5bbaee8
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5 changed files with 68 additions and 5 deletions
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19
Objects/codeobject.c
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@ -1695,6 +1695,15 @@ code_richcompare(PyObject *self, PyObject *other, int op)
eq = PyObject_RichCompareBool(co->co_localsplusnames,
cp->co_localsplusnames, Py_EQ);
if (eq <= 0) goto unequal;
eq = PyObject_RichCompareBool(co->co_linetable, cp->co_linetable, Py_EQ);
if (eq <= 0) {
goto unequal;
}
eq = PyObject_RichCompareBool(co->co_exceptiontable,
cp->co_exceptiontable, Py_EQ);
if (eq <= 0) {
goto unequal;
}
if (op == Py_EQ)
res = Py_True;
@ -1727,7 +1736,15 @@ code_hash(PyCodeObject *co)
if (h2 == -1) return -1;
h3 = PyObject_Hash(co->co_localsplusnames);
if (h3 == -1) return -1;
h = h0 ^ h1 ^ h2 ^ h3 ^
Py_hash_t h4 = PyObject_Hash(co->co_linetable);
if (h4 == -1) {
return -1;
}
Py_hash_t h5 = PyObject_Hash(co->co_exceptiontable);
if (h5 == -1) {
return -1;
}
h = h0 ^ h1 ^ h2 ^ h3 ^ h4 ^ h5 ^
co->co_argcount ^ co->co_posonlyargcount ^ co->co_kwonlyargcount ^
co->co_flags;
if (h == -1) h = -2;