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GH-132508: Use tagged integers on the evaluation stack for the last instruction offset (GH-132545)

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Mark Shannon 2025-04-29 18:00:35 +01:00 • committed by GitHub
parent caee16f052
commit ccf1b0b1c1
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14 changed files with 129 additions and 60 deletions
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20
Python/bytecodes.c
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@ -1384,16 +1384,7 @@ dummy_func(
assert(oparg >= 0 && oparg <= 2);
if (oparg) {
PyObject *lasti = PyStackRef_AsPyObjectBorrow(values[0]);
if (PyLong_Check(lasti)) {
frame->instr_ptr = _PyFrame_GetBytecode(frame) + PyLong_AsLong(lasti);
assert(!_PyErr_Occurred(tstate));
}
else {
_PyErr_SetString(tstate, PyExc_SystemError, "lasti is not an int");
Py_DECREF(exc);
ERROR_NO_POP();
}
frame->instr_ptr = _PyFrame_GetBytecode(frame) + PyStackRef_UntagInt(values[0]);
}
assert(exc && PyExceptionInstance_Check(exc));
_PyErr_SetRaisedException(tstate, exc);
@ -3472,7 +3463,7 @@ dummy_func(
if (tb == NULL) {
tb = Py_None;
}
assert(PyStackRef_LongCheck(lasti));
assert(PyStackRef_IsTaggedInt(lasti));
(void)lasti; // Shut up compiler warning if asserts are off
PyObject *stack[5] = {NULL, PyStackRef_AsPyObjectBorrow(exit_self), exc, val_o, tb};
int has_self = !PyStackRef_IsNull(exit_self);
@ -5378,11 +5369,8 @@ dummy_func(
}
if (lasti) {
int frame_lasti = _PyInterpreterFrame_LASTI(frame);
PyObject *lasti = PyLong_FromLong(frame_lasti);
if (lasti == NULL) {
goto exception_unwind;
}
_PyFrame_StackPush(frame, PyStackRef_FromPyObjectSteal(lasti));
_PyStackRef lasti = PyStackRef_TagInt(frame_lasti);
_PyFrame_StackPush(frame, lasti);
}
/* Make the raw exception data