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GH-128682: Stronger checking of PyStackRef_CLOSE and DEAD. (GH-128683)

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Mark Shannon 2025-01-13 12:37:48 +00:00 • committed by GitHub
parent 6ff8f82f92
commit 517dc65ffc
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GPG key ID: B5690EEEBB952194
7 changed files with 224 additions and 127 deletions
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6
Include/internal/pycore_opcode_metadata.h generated
View file

@ -1985,7 +1985,7 @@ const struct opcode_metadata _PyOpcode_opcode_metadata[266] = {
[BINARY_OP_ADD_FLOAT] = { true, INSTR_FMT_IXC, HAS_EXIT_FLAG | HAS_ERROR_FLAG },
[BINARY_OP_ADD_INT] = { true, INSTR_FMT_IXC, HAS_EXIT_FLAG | HAS_ERROR_FLAG },
[BINARY_OP_ADD_UNICODE] = { true, INSTR_FMT_IXC, HAS_EXIT_FLAG | HAS_ERROR_FLAG },
[BINARY_OP_INPLACE_ADD_UNICODE] = { true, INSTR_FMT_IXC, HAS_LOCAL_FLAG | HAS_DEOPT_FLAG | HAS_EXIT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[BINARY_OP_INPLACE_ADD_UNICODE] = { true, INSTR_FMT_IXC, HAS_LOCAL_FLAG | HAS_DEOPT_FLAG | HAS_EXIT_FLAG | HAS_ERROR_FLAG },
[BINARY_OP_MULTIPLY_FLOAT] = { true, INSTR_FMT_IXC, HAS_EXIT_FLAG | HAS_ERROR_FLAG },
[BINARY_OP_MULTIPLY_INT] = { true, INSTR_FMT_IXC, HAS_EXIT_FLAG | HAS_ERROR_FLAG },
[BINARY_OP_SUBTRACT_FLOAT] = { true, INSTR_FMT_IXC, HAS_EXIT_FLAG | HAS_ERROR_FLAG },
@ -2055,7 +2055,7 @@ const struct opcode_metadata _PyOpcode_opcode_metadata[266] = {
[DICT_UPDATE] = { true, INSTR_FMT_IB, HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[END_ASYNC_FOR] = { true, INSTR_FMT_IX, HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[END_FOR] = { true, INSTR_FMT_IX, HAS_ESCAPES_FLAG | HAS_NO_SAVE_IP_FLAG },
[END_SEND] = { true, INSTR_FMT_IX, HAS_ESCAPES_FLAG | HAS_PURE_FLAG },
[END_SEND] = { true, INSTR_FMT_IX, HAS_PURE_FLAG },
[ENTER_EXECUTOR] = { true, INSTR_FMT_IB, HAS_ARG_FLAG },
[EXIT_INIT_CHECK] = { true, INSTR_FMT_IX, HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[EXTENDED_ARG] = { true, INSTR_FMT_IB, HAS_ARG_FLAG },
@ -2136,7 +2136,7 @@ const struct opcode_metadata _PyOpcode_opcode_metadata[266] = {
[LOAD_SPECIAL] = { true, INSTR_FMT_IB, HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[LOAD_SUPER_ATTR] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[LOAD_SUPER_ATTR_ATTR] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[LOAD_SUPER_ATTR_METHOD] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[LOAD_SUPER_ATTR_METHOD] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[MAKE_CELL] = { true, INSTR_FMT_IB, HAS_ARG_FLAG | HAS_FREE_FLAG | HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[MAKE_FUNCTION] = { true, INSTR_FMT_IX, HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[MAP_ADD] = { true, INSTR_FMT_IB, HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },

6
Include/internal/pycore_uop_metadata.h generated
View file

@ -56,7 +56,7 @@ const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {
[_POP_TOP] = HAS_PURE_FLAG,
[_PUSH_NULL] = HAS_PURE_FLAG,
[_END_FOR] = HAS_ESCAPES_FLAG | HAS_NO_SAVE_IP_FLAG,
[_END_SEND] = HAS_ESCAPES_FLAG | HAS_PURE_FLAG,
[_END_SEND] = HAS_PURE_FLAG,
[_UNARY_NEGATIVE] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_UNARY_NOT] = HAS_PURE_FLAG,
[_TO_BOOL] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
@ -81,7 +81,7 @@ const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {
[_BINARY_OP_SUBTRACT_FLOAT] = HAS_ERROR_FLAG | HAS_PURE_FLAG,
[_GUARD_BOTH_UNICODE] = HAS_EXIT_FLAG,
[_BINARY_OP_ADD_UNICODE] = HAS_ERROR_FLAG | HAS_PURE_FLAG,
[_BINARY_OP_INPLACE_ADD_UNICODE] = HAS_LOCAL_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_BINARY_OP_INPLACE_ADD_UNICODE] = HAS_LOCAL_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG,
[_BINARY_SUBSCR] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_BINARY_SLICE] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_STORE_SLICE] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
@ -146,7 +146,7 @@ const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {
[_DICT_MERGE] = HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_MAP_ADD] = HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_LOAD_SUPER_ATTR_ATTR] = HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_LOAD_SUPER_ATTR_METHOD] = HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_LOAD_SUPER_ATTR_METHOD] = HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG,
[_LOAD_ATTR] = HAS_ARG_FLAG | HAS_NAME_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_GUARD_TYPE_VERSION] = HAS_EXIT_FLAG,
[_GUARD_TYPE_VERSION_AND_LOCK] = HAS_EXIT_FLAG,

12
Lib/test/test_generated_cases.py
View file

@ -1739,6 +1739,18 @@ class TestGeneratedCases(unittest.TestCase):
with self.assertRaises(SyntaxError):
self.run_cases_test(input, "")
def test_kill_in_wrong_order(self):
input = """
inst(OP, (a, b -- c)) {
c = b;
PyStackRef_CLOSE(a);
PyStackRef_CLOSE(b);
}
"""
with self.assertRaises(SyntaxError):
self.run_cases_test(input, "")
class TestGeneratedAbstractCases(unittest.TestCase):
def setUp(self) -> None:
super().setUp()

78
Python/bytecodes.c
View file

@ -384,7 +384,7 @@ dummy_func(
(void)receiver;
val = value;
DEAD(value);
PyStackRef_CLOSE(receiver);
DECREF_INPUTS();
}
tier1 inst(INSTRUMENTED_END_SEND, (receiver, value -- val)) {
@ -681,8 +681,8 @@ dummy_func(
STAT_INC(BINARY_OP, hit);
PyObject *res_o = PyUnicode_Concat(left_o, right_o);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
PyStackRef_CLOSE_SPECIALIZED(right, _PyUnicode_ExactDealloc);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
INPUTS_DEAD();
ERROR_IF(res_o == NULL, error);
res = PyStackRef_FromPyObjectSteal(res_o);
@ -725,7 +725,7 @@ dummy_func(
* that the string is safe to mutate.
*/
assert(Py_REFCNT(left_o) >= 2);
PyStackRef_CLOSE(left);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
DEAD(left);
PyObject *temp = PyStackRef_AsPyObjectSteal(*target_local);
PyUnicode_Append(&temp, right_o);
@ -822,8 +822,7 @@ dummy_func(
err = PyObject_SetItem(PyStackRef_AsPyObjectBorrow(container), slice, PyStackRef_AsPyObjectBorrow(v));
Py_DECREF(slice);
}
PyStackRef_CLOSE(v);
PyStackRef_CLOSE(container);
DECREF_INPUTS();
ERROR_IF(err, error);
}
@ -2082,11 +2081,8 @@ dummy_func(
int method_found = 0;
PyObject *attr_o = _PySuper_Lookup(cls, self, name,
Py_TYPE(self)->tp_getattro == PyObject_GenericGetAttr ? &method_found : NULL);
PyStackRef_CLOSE(global_super_st);
PyStackRef_CLOSE(class_st);
if (attr_o == NULL) {
PyStackRef_CLOSE(self_st);
ERROR_IF(true, error);
ERROR_NO_POP();
}
if (method_found) {
self_or_null = self_st; // transfer ownership
@ -2095,6 +2091,8 @@ dummy_func(
PyStackRef_CLOSE(self_st);
self_or_null = PyStackRef_NULL;
}
PyStackRef_CLOSE(class_st);
PyStackRef_CLOSE(global_super_st);
attr = PyStackRef_FromPyObjectSteal(attr_o);
}
@ -2920,7 +2918,6 @@ dummy_func(
else {
/* `iterable` is not a generator. */
PyObject *iter_o = PyObject_GetIter(iterable_o);
DEAD(iterable);
if (iter_o == NULL) {
ERROR_NO_POP();
}
@ -3466,11 +3463,11 @@ dummy_func(
/* Callable is not a normal Python function */
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
DEAD(self_or_null);
PyStackRef_CLOSE(callable[0]);
ERROR_IF(true, error);
}
PyObject *res_o = PyObject_Vectorcall(
@ -3496,11 +3493,11 @@ dummy_func(
}
}
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
DEAD(self_or_null);
PyStackRef_CLOSE(callable[0]);
ERROR_IF(res_o == NULL, error);
res = PyStackRef_FromPyObjectSteal(res_o);
}
@ -3636,11 +3633,11 @@ dummy_func(
NULL);
STACKREFS_TO_PYOBJECTS_CLEANUP(args_o);
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
DEAD(self_or_null);
PyStackRef_CLOSE(callable[0]);
ERROR_IF(res_o == NULL, error);
res = PyStackRef_FromPyObjectSteal(res_o);
}
@ -3865,28 +3862,29 @@ dummy_func(
op(_CALL_BUILTIN_CLASS, (callable[1], self_or_null[1], args[oparg] -- res)) {
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
total_args++;
}
DEAD(self_or_null);
DEOPT_IF(!PyType_Check(callable_o));
PyTypeObject *tp = (PyTypeObject *)callable_o;
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
arguments--;
total_args++;
}
DEOPT_IF(tp->tp_vectorcall == NULL);
STAT_INC(CALL, hit);
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
STACKREFS_TO_PYOBJECTS(arguments, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
DECREF_INPUTS();
ERROR_IF(true, error);
}
DEAD(self_or_null);
PyObject *res_o = tp->tp_vectorcall((PyObject *)tp, args_o, total_args, NULL);
STACKREFS_TO_PYOBJECTS_CLEANUP(args_o);
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
PyStackRef_CLOSE(arguments[i]);
}
DEAD(args);
PyStackRef_CLOSE(callable[0]);
ERROR_IF(res_o == NULL, error);
res = PyStackRef_FromPyObjectSteal(res_o);
@ -3939,21 +3937,22 @@ dummy_func(
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
arguments--;
total_args++;
}
DEAD(self_or_null);
DEOPT_IF(!PyCFunction_CheckExact(callable_o));
DEOPT_IF(PyCFunction_GET_FLAGS(callable_o) != METH_FASTCALL);
STAT_INC(CALL, hit);
PyCFunction cfunc = PyCFunction_GET_FUNCTION(callable_o);
/* res = func(self, args, nargs) */
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
STACKREFS_TO_PYOBJECTS(arguments, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
DECREF_INPUTS();
ERROR_IF(true, error);
}
DEAD(self_or_null);
PyObject *res_o = ((PyCFunctionFast)(void(*)(void))cfunc)(
PyCFunction_GET_SELF(callable_o),
args_o,
@ -3963,8 +3962,9 @@ dummy_func(
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
PyStackRef_CLOSE(arguments[i]);
}
DEAD(args);
PyStackRef_CLOSE(callable[0]);
ERROR_IF(res_o == NULL, error);
res = PyStackRef_FromPyObjectSteal(res_o);
@ -4043,8 +4043,10 @@ dummy_func(
if (res_o == NULL) {
GOTO_ERROR(error);
}
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(arg_stackref);
DEAD(args);
DEAD(self_or_null);
PyStackRef_CLOSE(callable[0]);
res = PyStackRef_FromPyObjectSteal(res_o);
}
@ -4053,25 +4055,24 @@ dummy_func(
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
arguments--;
total_args++;
}
DEOPT_IF(total_args != 2);
PyInterpreterState *interp = tstate->interp;
DEOPT_IF(callable_o != interp->callable_cache.isinstance);
STAT_INC(CALL, hit);
_PyStackRef cls_stackref = args[1];
_PyStackRef inst_stackref = args[0];
_PyStackRef cls_stackref = arguments[1];
_PyStackRef inst_stackref = arguments[0];
int retval = PyObject_IsInstance(PyStackRef_AsPyObjectBorrow(inst_stackref), PyStackRef_AsPyObjectBorrow(cls_stackref));
if (retval < 0) {
ERROR_NO_POP();
}
res = retval ? PyStackRef_True : PyStackRef_False;
assert((!PyStackRef_IsNull(res)) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(inst_stackref);
PyStackRef_CLOSE(cls_stackref);
PyStackRef_CLOSE(callable[0]);
DECREF_INPUTS();
}
// This is secretly a super-instruction
@ -4370,11 +4371,11 @@ dummy_func(
}
PyStackRef_CLOSE(kwnames);
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
DEAD(self_or_null);
PyStackRef_CLOSE(callable[0]);
ERROR_IF(res_o == NULL, error);
res = PyStackRef_FromPyObjectSteal(res_o);
}
@ -4529,6 +4530,8 @@ dummy_func(
PyObject *callargs_o = PyStackRef_AsPyObjectBorrow(callargs);
if (PyTuple_CheckExact(callargs_o)) {
tuple = callargs;
kwargs_out = kwargs_in;
DEAD(kwargs_in);
DEAD(callargs);
}
else {
@ -4540,11 +4543,11 @@ dummy_func(
if (tuple_o == NULL) {
ERROR_NO_POP();
}
kwargs_out = kwargs_in;
DEAD(kwargs_in);
PyStackRef_CLOSE(callargs);
tuple = PyStackRef_FromPyObjectSteal(tuple_o);
}
kwargs_out = kwargs_in;
DEAD(kwargs_in);
}
op(_DO_CALL_FUNCTION_EX, (func_st, unused, callargs_st, kwargs_st if (oparg & 1) -- result)) {
@ -4720,8 +4723,7 @@ dummy_func(
inst(FORMAT_WITH_SPEC, (value, fmt_spec -- res)) {
PyObject *res_o = PyObject_Format(PyStackRef_AsPyObjectBorrow(value), PyStackRef_AsPyObjectBorrow(fmt_spec));
PyStackRef_CLOSE(value);
PyStackRef_CLOSE(fmt_spec);
DECREF_INPUTS();
ERROR_IF(res_o == NULL, error);
res = PyStackRef_FromPyObjectSteal(res_o);
}

67
Python/executor_cases.c.h generated
View file

@ -838,8 +838,8 @@
assert(PyUnicode_CheckExact(right_o));
STAT_INC(BINARY_OP, hit);
PyObject *res_o = PyUnicode_Concat(left_o, right_o);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
PyStackRef_CLOSE_SPECIALIZED(right, _PyUnicode_ExactDealloc);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
if (res_o == NULL) JUMP_TO_ERROR();
res = PyStackRef_FromPyObjectSteal(res_o);
stack_pointer[-2] = res;
@ -882,7 +882,7 @@
* that the string is safe to mutate.
*/
assert(Py_REFCNT(left_o) >= 2);
PyStackRef_CLOSE(left);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
PyObject *temp = PyStackRef_AsPyObjectSteal(*target_local);
PyUnicode_Append(&temp, right_o);
*target_local = PyStackRef_FromPyObjectSteal(temp);
@ -2529,11 +2529,8 @@
PyObject *attr_o = _PySuper_Lookup(cls, self, name,
Py_TYPE(self)->tp_getattro == PyObject_GenericGetAttr ? &method_found : NULL);
stack_pointer = _PyFrame_GetStackPointer(frame);
PyStackRef_CLOSE(global_super_st);
PyStackRef_CLOSE(class_st);
if (attr_o == NULL) {
PyStackRef_CLOSE(self_st);
if (true) JUMP_TO_ERROR();
JUMP_TO_ERROR();
}
if (method_found) {
self_or_null = self_st; // transfer ownership
@ -2541,6 +2538,8 @@
PyStackRef_CLOSE(self_st);
self_or_null = PyStackRef_NULL;
}
PyStackRef_CLOSE(class_st);
PyStackRef_CLOSE(global_super_st);
attr = PyStackRef_FromPyObjectSteal(attr_o);
stack_pointer[-3] = attr;
stack_pointer[-2] = self_or_null;
@ -4215,7 +4214,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -4229,10 +4228,10 @@
stack_pointer = _PyFrame_GetStackPointer(frame);
STACKREFS_TO_PYOBJECTS_CLEANUP(args_o);
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) JUMP_TO_ERROR();
res = PyStackRef_FromPyObjectSteal(res_o);
stack_pointer[-2 - oparg] = res;
@ -4695,25 +4694,26 @@
self_or_null = &stack_pointer[-1 - oparg];
callable = &stack_pointer[-2 - oparg];
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
total_args++;
}
if (!PyType_Check(callable_o)) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
PyTypeObject *tp = (PyTypeObject *)callable_o;
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
arguments--;
total_args++;
}
if (tp->tp_vectorcall == NULL) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
STAT_INC(CALL, hit);
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
STACKREFS_TO_PYOBJECTS(arguments, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -4725,7 +4725,7 @@
STACKREFS_TO_PYOBJECTS_CLEANUP(args_o);
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
PyStackRef_CLOSE(arguments[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) JUMP_TO_ERROR();
@ -4800,8 +4800,9 @@
/* Builtin METH_FASTCALL functions, without keywords */
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
arguments--;
total_args++;
}
if (!PyCFunction_CheckExact(callable_o)) {
@ -4815,10 +4816,10 @@
STAT_INC(CALL, hit);
PyCFunction cfunc = PyCFunction_GET_FUNCTION(callable_o);
/* res = func(self, args, nargs) */
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
STACKREFS_TO_PYOBJECTS(arguments, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -4834,7 +4835,7 @@
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
PyStackRef_CLOSE(arguments[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) JUMP_TO_ERROR();
@ -4879,7 +4880,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -4942,8 +4943,8 @@
if (res_o == NULL) {
GOTO_ERROR(error);
}
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(arg_stackref);
PyStackRef_CLOSE(callable[0]);
res = PyStackRef_FromPyObjectSteal(res_o);
stack_pointer[-2 - oparg] = res;
stack_pointer += -1 - oparg;
@ -4963,8 +4964,9 @@
/* isinstance(o, o2) */
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
arguments--;
total_args++;
}
if (total_args != 2) {
@ -4977,8 +4979,8 @@
JUMP_TO_JUMP_TARGET();
}
STAT_INC(CALL, hit);
_PyStackRef cls_stackref = args[1];
_PyStackRef inst_stackref = args[0];
_PyStackRef cls_stackref = arguments[1];
_PyStackRef inst_stackref = arguments[0];
_PyFrame_SetStackPointer(frame, stack_pointer);
int retval = PyObject_IsInstance(PyStackRef_AsPyObjectBorrow(inst_stackref), PyStackRef_AsPyObjectBorrow(cls_stackref));
stack_pointer = _PyFrame_GetStackPointer(frame);
@ -4987,9 +4989,11 @@
}
res = retval ? PyStackRef_True : PyStackRef_False;
assert((!PyStackRef_IsNull(res)) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(inst_stackref);
PyStackRef_CLOSE(cls_stackref);
PyStackRef_CLOSE(callable[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
stack_pointer[-2 - oparg] = res;
stack_pointer += -1 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -5136,7 +5140,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -5257,7 +5261,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -5467,7 +5471,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -5512,6 +5516,7 @@
PyObject *callargs_o = PyStackRef_AsPyObjectBorrow(callargs);
if (PyTuple_CheckExact(callargs_o)) {
tuple = callargs;
kwargs_out = kwargs_in;
}
else {
_PyFrame_SetStackPointer(frame, stack_pointer);
@ -5526,10 +5531,10 @@
if (tuple_o == NULL) {
JUMP_TO_ERROR();
}
kwargs_out = kwargs_in;
PyStackRef_CLOSE(callargs);
tuple = PyStackRef_FromPyObjectSteal(tuple_o);
}
kwargs_out = kwargs_in;
stack_pointer[-1 - (oparg & 1)] = tuple;
if (oparg & 1) stack_pointer[-(oparg & 1)] = kwargs_out;
break;

79
Python/generated_cases.c.h generated
View file

@ -159,8 +159,8 @@
assert(PyUnicode_CheckExact(right_o));
STAT_INC(BINARY_OP, hit);
PyObject *res_o = PyUnicode_Concat(left_o, right_o);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
PyStackRef_CLOSE_SPECIALIZED(right, _PyUnicode_ExactDealloc);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
if (res_o == NULL) goto pop_2_error;
res = PyStackRef_FromPyObjectSteal(res_o);
}
@ -215,7 +215,7 @@
* that the string is safe to mutate.
*/
assert(Py_REFCNT(left_o) >= 2);
PyStackRef_CLOSE(left);
PyStackRef_CLOSE_SPECIALIZED(left, _PyUnicode_ExactDealloc);
PyObject *temp = PyStackRef_AsPyObjectSteal(*target_local);
PyUnicode_Append(&temp, right_o);
*target_local = PyStackRef_FromPyObjectSteal(temp);
@ -962,10 +962,10 @@
/* Callable is not a normal Python function */
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
PyStackRef_CLOSE(callable[0]);
{
stack_pointer += -2 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -1001,10 +1001,10 @@
}
}
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) {
stack_pointer += -2 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -1351,19 +1351,20 @@
self_or_null = &stack_pointer[-1 - oparg];
callable = &stack_pointer[-2 - oparg];
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
total_args++;
}
DEOPT_IF(!PyType_Check(callable_o), CALL);
PyTypeObject *tp = (PyTypeObject *)callable_o;
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
arguments--;
total_args++;
}
DEOPT_IF(tp->tp_vectorcall == NULL, CALL);
STAT_INC(CALL, hit);
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
STACKREFS_TO_PYOBJECTS(arguments, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -1379,7 +1380,7 @@
STACKREFS_TO_PYOBJECTS_CLEANUP(args_o);
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
PyStackRef_CLOSE(arguments[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) {
@ -1430,8 +1431,9 @@
/* Builtin METH_FASTCALL functions, without keywords */
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
arguments--;
total_args++;
}
DEOPT_IF(!PyCFunction_CheckExact(callable_o), CALL);
@ -1439,10 +1441,10 @@
STAT_INC(CALL, hit);
PyCFunction cfunc = PyCFunction_GET_FUNCTION(callable_o);
/* res = func(self, args, nargs) */
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
STACKREFS_TO_PYOBJECTS(arguments, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -1462,7 +1464,7 @@
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
/* Free the arguments. */
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
PyStackRef_CLOSE(arguments[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) {
@ -1529,7 +1531,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -1670,6 +1672,7 @@
PyObject *callargs_o = PyStackRef_AsPyObjectBorrow(callargs);
if (PyTuple_CheckExact(callargs_o)) {
tuple = callargs;
kwargs_out = kwargs_in;
}
else {
_PyFrame_SetStackPointer(frame, stack_pointer);
@ -1684,10 +1687,10 @@
if (tuple_o == NULL) {
goto error;
}
kwargs_out = kwargs_in;
PyStackRef_CLOSE(callargs);
tuple = PyStackRef_FromPyObjectSteal(tuple_o);
}
kwargs_out = kwargs_in;
}
// _DO_CALL_FUNCTION_EX
{
@ -1872,16 +1875,17 @@
/* isinstance(o, o2) */
PyObject *callable_o = PyStackRef_AsPyObjectBorrow(callable[0]);
int total_args = oparg;
_PyStackRef *arguments = args;
if (!PyStackRef_IsNull(self_or_null[0])) {
args--;
arguments--;
total_args++;
}
DEOPT_IF(total_args != 2, CALL);
PyInterpreterState *interp = tstate->interp;
DEOPT_IF(callable_o != interp->callable_cache.isinstance, CALL);
STAT_INC(CALL, hit);
_PyStackRef cls_stackref = args[1];
_PyStackRef inst_stackref = args[0];
_PyStackRef cls_stackref = arguments[1];
_PyStackRef inst_stackref = arguments[0];
_PyFrame_SetStackPointer(frame, stack_pointer);
int retval = PyObject_IsInstance(PyStackRef_AsPyObjectBorrow(inst_stackref), PyStackRef_AsPyObjectBorrow(cls_stackref));
stack_pointer = _PyFrame_GetStackPointer(frame);
@ -1890,9 +1894,11 @@
}
res = retval ? PyStackRef_True : PyStackRef_False;
assert((!PyStackRef_IsNull(res)) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(inst_stackref);
PyStackRef_CLOSE(cls_stackref);
PyStackRef_CLOSE(callable[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
stack_pointer[-2 - oparg] = res;
stack_pointer += -1 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -1997,7 +2003,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -2039,10 +2045,10 @@
}
PyStackRef_CLOSE(kwnames);
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) {
stack_pointer += -3 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -2198,7 +2204,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -2375,8 +2381,8 @@
if (res_o == NULL) {
GOTO_ERROR(error);
}
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(arg_stackref);
PyStackRef_CLOSE(callable[0]);
res = PyStackRef_FromPyObjectSteal(res_o);
stack_pointer[-2 - oparg] = res;
stack_pointer += -1 - oparg;
@ -2456,7 +2462,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -2541,7 +2547,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -2774,7 +2780,7 @@
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
PyStackRef_CLOSE(self_or_null[0]);
PyStackRef_XCLOSE(self_or_null[0]);
for (int _i = oparg; --_i >= 0;) {
PyStackRef_CLOSE(args[_i]);
}
@ -2792,10 +2798,10 @@
stack_pointer = _PyFrame_GetStackPointer(frame);
STACKREFS_TO_PYOBJECTS_CLEANUP(args_o);
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) {
stack_pointer += -2 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -4480,10 +4486,10 @@
/* Callable is not a normal Python function */
STACKREFS_TO_PYOBJECTS(args, total_args, args_o);
if (CONVERSION_FAILED(args_o)) {
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
PyStackRef_CLOSE(callable[0]);
{
stack_pointer += -2 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -4519,10 +4525,10 @@
}
}
assert((res_o != NULL) ^ (_PyErr_Occurred(tstate) != NULL));
PyStackRef_CLOSE(callable[0]);
for (int i = 0; i < total_args; i++) {
PyStackRef_CLOSE(args[i]);
}
PyStackRef_CLOSE(callable[0]);
if (res_o == NULL) {
stack_pointer += -2 - oparg;
assert(WITHIN_STACK_BOUNDS());
@ -6540,11 +6546,8 @@
PyObject *attr_o = _PySuper_Lookup(cls, self, name,
Py_TYPE(self)->tp_getattro == PyObject_GenericGetAttr ? &method_found : NULL);
stack_pointer = _PyFrame_GetStackPointer(frame);
PyStackRef_CLOSE(global_super_st);
PyStackRef_CLOSE(class_st);
if (attr_o == NULL) {
PyStackRef_CLOSE(self_st);
goto pop_3_error;
goto error;
}
if (method_found) {
self_or_null = self_st; // transfer ownership
@ -6552,6 +6555,8 @@
PyStackRef_CLOSE(self_st);
self_or_null = PyStackRef_NULL;
}
PyStackRef_CLOSE(class_st);
PyStackRef_CLOSE(global_super_st);
attr = PyStackRef_FromPyObjectSteal(attr_o);
stack_pointer[-3] = attr;
stack_pointer[-2] = self_or_null;

103
Tools/cases_generator/generators_common.py
View file

@ -98,6 +98,11 @@ def always_true(tkn: Token | None) -> bool:
return False
return tkn.text in {"true", "1"}
NON_ESCAPING_DEALLOCS = {
"_PyFloat_ExactDealloc",
"_PyLong_ExactDealloc",
"_PyUnicode_ExactDealloc",
}
class Emitter:
out: CWriter
@ -116,7 +121,7 @@ class Emitter:
"SAVE_STACK": self.save_stack,
"RELOAD_STACK": self.reload_stack,
"PyStackRef_CLOSE": self.stackref_close,
"PyStackRef_CLOSE_SPECIALIZED": self.stackref_close,
"PyStackRef_CLOSE_SPECIALIZED": self.stackref_close_specialized,
"PyStackRef_AsPyObjectSteal": self.stackref_steal,
"DISPATCH": self.dispatch,
"INSTRUCTION_SIZE": self.instruction_size,
@ -234,23 +239,26 @@ class Emitter:
next(tkn_iter)
next(tkn_iter)
self.out.emit_at("", tkn)
for var in uop.stack.inputs:
if var.name == "unused" or var.name == "null" or var.peek:
for var in storage.inputs:
if not var.defined:
continue
if var.name == "null":
continue
close = "PyStackRef_CLOSE"
if "null" in var.name or var.condition and var.condition != "1":
close = "PyStackRef_XCLOSE"
if var.size:
if var.size == "1":
self.out.emit(f"PyStackRef_CLOSE({var.name}[0]);\n")
self.out.emit(f"{close}({var.name}[0]);\n")
else:
self.out.emit(f"for (int _i = {var.size}; --_i >= 0;) {{\n")
self.out.emit(f"PyStackRef_CLOSE({var.name}[_i]);\n")
self.out.emit(f"{close}({var.name}[_i]);\n")
self.out.emit("}\n")
elif var.condition:
if var.condition == "1":
self.out.emit(f"PyStackRef_CLOSE({var.name});\n")
elif var.condition != "0":
self.out.emit(f"PyStackRef_XCLOSE({var.name});\n")
if var.condition != "0":
self.out.emit(f"{close}({var.name});\n")
else:
self.out.emit(f"PyStackRef_CLOSE({var.name});\n")
self.out.emit(f"{close}({var.name});\n")
for input in storage.inputs:
input.defined = False
return True
@ -291,6 +299,25 @@ class Emitter:
raise analysis_error(f"'{name}' is not a live input-only variable", name_tkn)
return True
def stackref_kill(
self,
name: Token,
storage: Storage,
escapes: bool
) -> bool:
live = ""
for var in reversed(storage.inputs):
if var.name == name.text:
if live and escapes:
raise analysis_error(
f"Cannot close '{name.text}' when "
f"'{live}' is still live", name)
var.defined = False
break
if var.defined:
live = var.name
return True
def stackref_close(
self,
tkn: Token,
@ -306,14 +333,60 @@ class Emitter:
name = next(tkn_iter)
self.out.emit(name)
if name.kind == "IDENTIFIER":
for var in storage.inputs:
if var.name == name.text:
var.defined = False
return self.stackref_kill(name, storage, True)
rparen = emit_to(self.out, tkn_iter, "RPAREN")
self.emit(rparen)
return True
stackref_steal = stackref_close
def stackref_close_specialized(
self,
tkn: Token,
tkn_iter: TokenIterator,
uop: Uop,
storage: Storage,
inst: Instruction | None,
) -> bool:
self.out.emit(tkn)
tkn = next(tkn_iter)
assert tkn.kind == "LPAREN"
self.out.emit(tkn)
name = next(tkn_iter)
self.out.emit(name)
comma = next(tkn_iter)
if comma.kind != "COMMA":
raise analysis_error("Expected comma", comma)
self.out.emit(comma)
dealloc = next(tkn_iter)
if dealloc.kind != "IDENTIFIER":
raise analysis_error("Expected identifier", dealloc)
self.out.emit(dealloc)
if name.kind == "IDENTIFIER":
escapes = dealloc.text not in NON_ESCAPING_DEALLOCS
return self.stackref_kill(name, storage, escapes)
rparen = emit_to(self.out, tkn_iter, "RPAREN")
self.emit(rparen)
return True
def stackref_steal(
self,
tkn: Token,
tkn_iter: TokenIterator,
uop: Uop,
storage: Storage,
inst: Instruction | None,
) -> bool:
self.out.emit(tkn)
tkn = next(tkn_iter)
assert tkn.kind == "LPAREN"
self.out.emit(tkn)
name = next(tkn_iter)
self.out.emit(name)
if name.kind == "IDENTIFIER":
return self.stackref_kill(name, storage, False)
rparen = emit_to(self.out, tkn_iter, "RPAREN")
self.emit(rparen)
return True
def sync_sp(
self,
@ -548,7 +621,7 @@ class Emitter:
storage.push_outputs()
self._print_storage(storage)
except StackError as ex:
raise analysis_error(ex.args[0], rbrace)
raise analysis_error(ex.args[0], rbrace) from None
return storage
def emit(self, txt: str | Token) -> None: