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Copy pathintrinsics.c
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339 lines (308 loc) · 11 KB
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#define _PY_INTERPRETER
#include "Python.h"
#include "pycore_compile.h" // _PyCompile_GetUnaryIntrinsicName
#include "pycore_function.h" // _Py_set_function_type_params()
#include "pycore_genobject.h" // _PyAsyncGenValueWrapperNew
#include "pycore_interpframe.h" // _PyFrame_GetLocals()
#include "pycore_intrinsics.h" // INTRINSIC_PRINT
#include "pycore_list.h" // _PyList_AsTupleAndClear()
#include "pycore_object.h" // _PyObject_IsUniquelyReferenced()
#include "pycore_setobject.h" // _PySet_Freeze()
#include "pycore_pyerrors.h" // _PyErr_SetString()
#include "pycore_runtime.h" // _Py_ID()
#include "pycore_typevarobject.h" // _Py_make_typevar()
#include "pycore_unicodeobject.h" // _PyUnicode_FromASCII()
/******** Unary functions ********/
static PyObject *
no_intrinsic1(PyThreadState* tstate, PyObject *unused)
{
_PyErr_SetString(tstate, PyExc_SystemError, "invalid intrinsic function");
return NULL;
}
static PyObject *
print_expr(PyThreadState* Py_UNUSED(ignored), PyObject *value)
{
PyObject *hook = PySys_GetAttr(&_Py_ID(displayhook));
if (hook == NULL) {
return NULL;
}
PyObject *res = PyObject_CallOneArg(hook, value);
Py_DECREF(hook);
return res;
}
static int
import_all_from(PyThreadState *tstate, PyObject *locals, PyObject *v)
{
PyObject *all, *dict, *name, *value;
int skip_leading_underscores = 0;
int pos, err;
if (PyObject_GetOptionalAttr(v, &_Py_ID(__all__), &all) < 0) {
return -1; /* Unexpected error */
}
if (all == NULL) {
if (PyObject_GetOptionalAttr(v, &_Py_ID(__dict__), &dict) < 0) {
return -1;
}
if (dict == NULL) {
_PyErr_SetString(tstate, PyExc_ImportError,
"from-import-* object has no __dict__ and no __all__");
return -1;
}
all = PyMapping_Keys(dict);
Py_DECREF(dict);
if (all == NULL)
return -1;
skip_leading_underscores = 1;
}
for (pos = 0, err = 0; ; pos++) {
name = PySequence_GetItem(all, pos);
if (name == NULL) {
if (!_PyErr_ExceptionMatches(tstate, PyExc_IndexError)) {
err = -1;
}
else {
_PyErr_Clear(tstate);
}
break;
}
if (!PyUnicode_Check(name)) {
PyObject *modname = PyObject_GetAttr(v, &_Py_ID(__name__));
if (modname == NULL) {
Py_DECREF(name);
err = -1;
break;
}
if (!PyUnicode_Check(modname)) {
_PyErr_Format(tstate, PyExc_TypeError,
"module __name__ must be a string, not %.100s",
Py_TYPE(modname)->tp_name);
}
else {
_PyErr_Format(tstate, PyExc_TypeError,
"%s in %U.%s must be str, not %.100s",
skip_leading_underscores ? "Key" : "Item",
modname,
skip_leading_underscores ? "__dict__" : "__all__",
Py_TYPE(name)->tp_name);
}
Py_DECREF(modname);
Py_DECREF(name);
err = -1;
break;
}
if (skip_leading_underscores) {
if (PyUnicode_READ_CHAR(name, 0) == '_') {
Py_DECREF(name);
continue;
}
}
value = PyObject_GetAttr(v, name);
if (value == NULL)
err = -1;
else if (PyDict_CheckExact(locals))
err = PyDict_SetItem(locals, name, value);
else
err = PyObject_SetItem(locals, name, value);
Py_DECREF(name);
Py_XDECREF(value);
if (err < 0)
break;
}
Py_DECREF(all);
return err;
}
static PyObject *
import_star(PyThreadState* tstate, PyObject *from)
{
_PyInterpreterFrame *frame = tstate->current_frame;
PyObject *locals = _PyFrame_GetLocals(frame);
if (locals == NULL) {
_PyErr_SetString(tstate, PyExc_SystemError,
"no locals found during 'import *'");
return NULL;
}
int err = import_all_from(tstate, locals, from);
Py_DECREF(locals);
if (err < 0) {
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
stopiteration_error(PyThreadState* tstate, PyObject *exc)
{
_PyInterpreterFrame *frame = tstate->current_frame;
assert(frame->owner == FRAME_OWNED_BY_GENERATOR);
assert(PyExceptionInstance_Check(exc));
const char *msg = NULL;
if (PyErr_GivenExceptionMatches(exc, PyExc_StopIteration)) {
msg = "generator raised StopIteration";
if (_PyFrame_GetCode(frame)->co_flags & CO_ASYNC_GENERATOR) {
msg = "async generator raised StopIteration";
}
else if (_PyFrame_GetCode(frame)->co_flags & CO_COROUTINE) {
msg = "coroutine raised StopIteration";
}
}
else if ((_PyFrame_GetCode(frame)->co_flags & CO_ASYNC_GENERATOR) &&
PyErr_GivenExceptionMatches(exc, PyExc_StopAsyncIteration))
{
/* code in `gen` raised a StopAsyncIteration error:
raise a RuntimeError.
*/
msg = "async generator raised StopAsyncIteration";
}
if (msg != NULL) {
PyObject *message = _PyUnicode_FromASCII(msg, strlen(msg));
if (message == NULL) {
return NULL;
}
PyObject *error = PyObject_CallOneArg(PyExc_RuntimeError, message);
if (error == NULL) {
Py_DECREF(message);
return NULL;
}
assert(PyExceptionInstance_Check(error));
PyException_SetCause(error, Py_NewRef(exc));
// Steal exc reference, rather than Py_NewRef+Py_DECREF
PyException_SetContext(error, Py_NewRef(exc));
Py_DECREF(message);
return error;
}
return Py_NewRef(exc);
}
static PyObject *
unary_pos(PyThreadState* unused, PyObject *value)
{
return PyNumber_Positive(value);
}
static PyObject *
list_to_tuple(PyThreadState* unused, PyObject *v)
{
/* INTRINSIC_LIST_TO_TUPLE is only emitted by the compiler for a
freshly-built, uniquely-referenced temporary list, so steal its items
into the tuple instead of copying them. */
assert(PyList_CheckExact(v));
assert(_PyObject_IsUniquelyReferenced(v));
return _PyList_AsTupleAndClear((PyListObject *)v);
}
static PyObject *
make_typevar(PyThreadState* Py_UNUSED(ignored), PyObject *v)
{
assert(PyUnicode_Check(v));
return _Py_make_typevar(v, NULL, NULL);
}
static PyObject *
make_frozenset(PyThreadState* Py_UNUSED(ignored), PyObject *set)
{
assert(PySet_CheckExact(set));
assert(_PyObject_IsUniquelyReferenced(set));
return _PySet_Freeze(set);
}
#define INTRINSIC_FUNC_ENTRY(N, F) \
[N] = {F, #N},
const intrinsic_func1_info
_PyIntrinsics_UnaryFunctions[] = {
INTRINSIC_FUNC_ENTRY(INTRINSIC_1_INVALID, no_intrinsic1)
INTRINSIC_FUNC_ENTRY(INTRINSIC_PRINT, print_expr)
INTRINSIC_FUNC_ENTRY(INTRINSIC_IMPORT_STAR, import_star)
INTRINSIC_FUNC_ENTRY(INTRINSIC_STOPITERATION_ERROR, stopiteration_error)
INTRINSIC_FUNC_ENTRY(INTRINSIC_ASYNC_GEN_WRAP, _PyAsyncGenValueWrapperNew)
INTRINSIC_FUNC_ENTRY(INTRINSIC_UNARY_POSITIVE, unary_pos)
INTRINSIC_FUNC_ENTRY(INTRINSIC_LIST_TO_TUPLE, list_to_tuple)
INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR, make_typevar)
INTRINSIC_FUNC_ENTRY(INTRINSIC_PARAMSPEC, _Py_make_paramspec)
INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVARTUPLE, _Py_make_typevartuple)
INTRINSIC_FUNC_ENTRY(INTRINSIC_SUBSCRIPT_GENERIC, _Py_subscript_generic)
INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEALIAS, _Py_make_typealias)
INTRINSIC_FUNC_ENTRY(INTRINSIC_BUILD_FROZENSET, make_frozenset)
};
/******** Binary functions ********/
static PyObject *
no_intrinsic2(PyThreadState* tstate, PyObject *unused1, PyObject *unused2)
{
_PyErr_SetString(tstate, PyExc_SystemError, "invalid intrinsic function");
return NULL;
}
static PyObject *
prep_reraise_star(PyThreadState* unused, PyObject *orig, PyObject *excs)
{
assert(PyList_Check(excs));
return _PyExc_PrepReraiseStar(orig, excs);
}
static PyObject *
make_typevar_with_bound(PyThreadState* Py_UNUSED(ignored), PyObject *name,
PyObject *evaluate_bound)
{
assert(PyUnicode_Check(name));
return _Py_make_typevar(name, evaluate_bound, NULL);
}
static PyObject *
make_typevar_with_constraints(PyThreadState* Py_UNUSED(ignored), PyObject *name,
PyObject *evaluate_constraints)
{
assert(PyUnicode_Check(name));
return _Py_make_typevar(name, NULL, evaluate_constraints);
}
static PyObject *
add_conditional_annotation(PyThreadState* tstate, PyObject *conditional_annotations,
PyObject *index)
{
// gh-154902: user code can rebind __conditional_annotations__ to any object
if (!PySet_CheckExact(conditional_annotations)) {
_PyErr_Format(tstate, PyExc_TypeError,
"__conditional_annotations__ must be a set, not %T",
conditional_annotations);
return NULL;
}
if (PySet_Add(conditional_annotations, index) < 0) {
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
match_class_isinstance(PyThreadState* tstate, PyObject *subject, PyObject *type)
{
/* Fast path for class patterns with no sub-patterns, e.g. `case C():`
Equivalent to the isinstance check performed by _PyEval_MatchClass,
including the same TypeError when the pattern does not refer to a
class. */
if (!PyType_Check(type)) {
_PyErr_SetString(tstate, PyExc_TypeError,
"class pattern must refer to a class");
return NULL;
}
int res = PyObject_IsInstance(subject, type);
if (res < 0) {
return NULL;
}
return res ? Py_True : Py_False;
}
const intrinsic_func2_info
_PyIntrinsics_BinaryFunctions[] = {
INTRINSIC_FUNC_ENTRY(INTRINSIC_2_INVALID, no_intrinsic2)
INTRINSIC_FUNC_ENTRY(INTRINSIC_PREP_RERAISE_STAR, prep_reraise_star)
INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR_WITH_BOUND, make_typevar_with_bound)
INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR_WITH_CONSTRAINTS, make_typevar_with_constraints)
INTRINSIC_FUNC_ENTRY(INTRINSIC_SET_FUNCTION_TYPE_PARAMS, _Py_set_function_type_params)
INTRINSIC_FUNC_ENTRY(INTRINSIC_SET_TYPEPARAM_DEFAULT, _Py_set_typeparam_default)
INTRINSIC_FUNC_ENTRY(INTRINSIC_ADD_CONDITIONAL_ANNOTATION, add_conditional_annotation)
INTRINSIC_FUNC_ENTRY(INTRINSIC_MATCH_CLASS_ISINSTANCE, match_class_isinstance)
};
#undef INTRINSIC_FUNC_ENTRY
PyObject*
_PyCompile_GetUnaryIntrinsicName(int index)
{
if (index < 0 || index > MAX_INTRINSIC_1) {
return NULL;
}
return PyUnicode_FromString(_PyIntrinsics_UnaryFunctions[index].name);
}
PyObject*
_PyCompile_GetBinaryIntrinsicName(int index)
{
if (index < 0 || index > MAX_INTRINSIC_2) {
return NULL;
}
return PyUnicode_FromString(_PyIntrinsics_BinaryFunctions[index].name);
}