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GH-100982: Restrict FOR_ITER_RANGE to a single instruction to allow instrumentation. (GH-101985)

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Mark Shannon 2023-02-22 11:11:57 +00:00 • committed by GitHub
parent 8d46c7ed5e
commit 7c106a443f
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4 changed files with 22 additions and 30 deletions
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Python/specialize.c
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@ -2155,8 +2155,6 @@ _Py_Specialize_ForIter(PyObject *iter, _Py_CODEUNIT *instr, int oparg)
assert(_PyOpcode_Caches[FOR_ITER] == INLINE_CACHE_ENTRIES_FOR_ITER);
_PyForIterCache *cache = (_PyForIterCache *)(instr + 1);
PyTypeObject *tp = Py_TYPE(iter);
_Py_CODEUNIT next = instr[1+INLINE_CACHE_ENTRIES_FOR_ITER];
int next_op = _PyOpcode_Deopt[next.op.code];
if (tp == &PyListIter_Type) {
instr->op.code = FOR_ITER_LIST;
goto success;
@ -2165,7 +2163,7 @@ _Py_Specialize_ForIter(PyObject *iter, _Py_CODEUNIT *instr, int oparg)
instr->op.code = FOR_ITER_TUPLE;
goto success;
}
else if (tp == &PyRangeIter_Type && next_op == STORE_FAST) {
else if (tp == &PyRangeIter_Type) {
instr->op.code = FOR_ITER_RANGE;
goto success;
}