1 files changed, 0 insertions, 1481 deletions
diff --git a/contrib/tools/python3/src/Python/_warnings.c b/contrib/tools/python3/src/Python/_warnings.c
deleted file mode 100644
index 1f91edbf5c..0000000000
--- a/contrib/tools/python3/src/Python/_warnings.c
+++ /dev/null
@@ -1,1481 +0,0 @@
-#include "Python.h"
-#include "pycore_initconfig.h"
-#include "pycore_interp.h"        // PyInterpreterState.warnings
-#include "pycore_long.h"          // _PyLong_GetZero()
-#include "pycore_pyerrors.h"
-#include "pycore_pystate.h"       // _PyThreadState_GET()
-#include "pycore_frame.h"
-#include "clinic/_warnings.c.h"
-
-#define MODULE_NAME "_warnings"
-
-PyDoc_STRVAR(warnings__doc__,
-MODULE_NAME " provides basic warning filtering support.\n"
-"It is a helper module to speed up interpreter start-up.");
-
-
-/*************************************************************************/
-
-typedef struct _warnings_runtime_state WarningsState;
-
-static inline int
-check_interp(PyInterpreterState *interp)
-{
-    if (interp == NULL) {
-        PyErr_SetString(PyExc_RuntimeError,
-                        "warnings_get_state: could not identify "
-                        "current interpreter");
-        return 0;
-    }
-    return 1;
-}
-
-static inline PyInterpreterState *
-get_current_interp(void)
-{
-    PyInterpreterState *interp = _PyInterpreterState_GET();
-    return check_interp(interp) ? interp : NULL;
-}
-
-static inline PyThreadState *
-get_current_tstate(void)
-{
-    PyThreadState *tstate = _PyThreadState_GET();
-    if (tstate == NULL) {
-        (void)check_interp(NULL);
-        return NULL;
-    }
-    return check_interp(tstate->interp) ? tstate : NULL;
-}
-
-/* Given a module object, get its per-module state. */
-static WarningsState *
-warnings_get_state(PyInterpreterState *interp)
-{
-    return &interp->warnings;
-}
-
-/* Clear the given warnings module state. */
-static void
-warnings_clear_state(WarningsState *st)
-{
-    Py_CLEAR(st->filters);
-    Py_CLEAR(st->once_registry);
-    Py_CLEAR(st->default_action);
-}
-
-#ifndef Py_DEBUG
-static PyObject *
-create_filter(PyObject *category, PyObject *action_str, const char *modname)
-{
-    PyObject *modname_obj = NULL;
-
-    /* Default to "no module name" for initial filter set */
-    if (modname != NULL) {
-        modname_obj = PyUnicode_InternFromString(modname);
-        if (modname_obj == NULL) {
-            return NULL;
-        }
-    } else {
-        modname_obj = Py_NewRef(Py_None);
-    }
-
-    /* This assumes the line number is zero for now. */
-    PyObject *filter = PyTuple_Pack(5, action_str, Py_None,
-                                    category, modname_obj, _PyLong_GetZero());
-    Py_DECREF(modname_obj);
-    return filter;
-}
-#endif
-
-static PyObject *
-init_filters(PyInterpreterState *interp)
-{
-#ifdef Py_DEBUG
-    /* Py_DEBUG builds show all warnings by default */
-    return PyList_New(0);
-#else
-    /* Other builds ignore a number of warning categories by default */
-    PyObject *filters = PyList_New(5);
-    if (filters == NULL) {
-        return NULL;
-    }
-
-    size_t pos = 0;  /* Post-incremented in each use. */
-#define ADD(TYPE, ACTION, MODNAME) \
-    PyList_SET_ITEM(filters, pos++, \
-                    create_filter(TYPE, &_Py_ID(ACTION), MODNAME));
-    ADD(PyExc_DeprecationWarning, default, "__main__");
-    ADD(PyExc_DeprecationWarning, ignore, NULL);
-    ADD(PyExc_PendingDeprecationWarning, ignore, NULL);
-    ADD(PyExc_ImportWarning, ignore, NULL);
-    ADD(PyExc_ResourceWarning, ignore, NULL);
-#undef ADD
-
-    for (size_t x = 0; x < pos; x++) {
-        if (PyList_GET_ITEM(filters, x) == NULL) {
-            Py_DECREF(filters);
-            return NULL;
-        }
-    }
-    return filters;
-#endif
-}
-
-/* Initialize the given warnings module state. */
-int
-_PyWarnings_InitState(PyInterpreterState *interp)
-{
-    WarningsState *st = &interp->warnings;
-
-    if (st->filters == NULL) {
-        st->filters = init_filters(interp);
-        if (st->filters == NULL) {
-            return -1;
-        }
-    }
-
-    if (st->once_registry == NULL) {
-        st->once_registry = PyDict_New();
-        if (st->once_registry == NULL) {
-            return -1;
-        }
-    }
-
-    if (st->default_action == NULL) {
-        st->default_action = PyUnicode_FromString("default");
-        if (st->default_action == NULL) {
-            return -1;
-        }
-    }
-
-    st->filters_version = 0;
-    return 0;
-}
-
-
-/*************************************************************************/
-
-static int
-check_matched(PyInterpreterState *interp, PyObject *obj, PyObject *arg)
-{
-    PyObject *result;
-    int rc;
-
-    /* A 'None' filter always matches */
-    if (obj == Py_None)
-        return 1;
-
-    /* An internal plain text default filter must match exactly */
-    if (PyUnicode_CheckExact(obj)) {
-        int cmp_result = PyUnicode_Compare(obj, arg);
-        if (cmp_result == -1 && PyErr_Occurred()) {
-            return -1;
-        }
-        return !cmp_result;
-    }
-
-    /* Otherwise assume a regex filter and call its match() method */
-    result = PyObject_CallMethodOneArg(obj, &_Py_ID(match), arg);
-    if (result == NULL)
-        return -1;
-
-    rc = PyObject_IsTrue(result);
-    Py_DECREF(result);
-    return rc;
-}
-
-#define GET_WARNINGS_ATTR(interp, ATTR, try_import) \
-    get_warnings_attr(interp, &_Py_ID(ATTR), try_import)
-
-/*
-   Returns a new reference.
-   A NULL return value can mean false or an error.
-*/
-static PyObject *
-get_warnings_attr(PyInterpreterState *interp, PyObject *attr, int try_import)
-{
-    PyObject *warnings_module, *obj;
-
-    /* don't try to import after the start of the Python finallization */
-    if (try_import && !_Py_IsInterpreterFinalizing(interp)) {
-        warnings_module = PyImport_Import(&_Py_ID(warnings));
-        if (warnings_module == NULL) {
-            /* Fallback to the C implementation if we cannot get
-               the Python implementation */
-            if (PyErr_ExceptionMatches(PyExc_ImportError)) {
-                PyErr_Clear();
-            }
-            return NULL;
-        }
-    }
-    else {
-        /* if we're so late into Python finalization that the module dict is
-           gone, then we can't even use PyImport_GetModule without triggering
-           an interpreter abort.
-        */
-        if (!_PyImport_GetModules(interp)) {
-            return NULL;
-        }
-        warnings_module = PyImport_GetModule(&_Py_ID(warnings));
-        if (warnings_module == NULL)
-            return NULL;
-    }
-
-    (void)_PyObject_LookupAttr(warnings_module, attr, &obj);
-    Py_DECREF(warnings_module);
-    return obj;
-}
-
-
-static PyObject *
-get_once_registry(PyInterpreterState *interp)
-{
-    PyObject *registry;
-
-    WarningsState *st = warnings_get_state(interp);
-    if (st == NULL) {
-        return NULL;
-    }
-
-    registry = GET_WARNINGS_ATTR(interp, onceregistry, 0);
-    if (registry == NULL) {
-        if (PyErr_Occurred())
-            return NULL;
-        assert(st->once_registry);
-        return st->once_registry;
-    }
-    if (!PyDict_Check(registry)) {
-        PyErr_Format(PyExc_TypeError,
-                     MODULE_NAME ".onceregistry must be a dict, "
-                     "not '%.200s'",
-                     Py_TYPE(registry)->tp_name);
-        Py_DECREF(registry);
-        return NULL;
-    }
-    Py_SETREF(st->once_registry, registry);
-    return registry;
-}
-
-
-static PyObject *
-get_default_action(PyInterpreterState *interp)
-{
-    PyObject *default_action;
-
-    WarningsState *st = warnings_get_state(interp);
-    if (st == NULL) {
-        return NULL;
-    }
-
-    default_action = GET_WARNINGS_ATTR(interp, defaultaction, 0);
-    if (default_action == NULL) {
-        if (PyErr_Occurred()) {
-            return NULL;
-        }
-        assert(st->default_action);
-        return st->default_action;
-    }
-    if (!PyUnicode_Check(default_action)) {
-        PyErr_Format(PyExc_TypeError,
-                     MODULE_NAME ".defaultaction must be a string, "
-                     "not '%.200s'",
-                     Py_TYPE(default_action)->tp_name);
-        Py_DECREF(default_action);
-        return NULL;
-    }
-    Py_SETREF(st->default_action, default_action);
-    return default_action;
-}
-
-
-/* The item is a new reference. */
-static PyObject*
-get_filter(PyInterpreterState *interp, PyObject *category,
-           PyObject *text, Py_ssize_t lineno,
-           PyObject *module, PyObject **item)
-{
-    PyObject *action;
-    Py_ssize_t i;
-    PyObject *warnings_filters;
-    WarningsState *st = warnings_get_state(interp);
-    if (st == NULL) {
-        return NULL;
-    }
-
-    warnings_filters = GET_WARNINGS_ATTR(interp, filters, 0);
-    if (warnings_filters == NULL) {
-        if (PyErr_Occurred())
-            return NULL;
-    }
-    else {
-        Py_SETREF(st->filters, warnings_filters);
-    }
-
-    PyObject *filters = st->filters;
-    if (filters == NULL || !PyList_Check(filters)) {
-        PyErr_SetString(PyExc_ValueError,
-                        MODULE_NAME ".filters must be a list");
-        return NULL;
-    }
-
-    /* WarningsState.filters could change while we are iterating over it. */
-    for (i = 0; i < PyList_GET_SIZE(filters); i++) {
-        PyObject *tmp_item, *action, *msg, *cat, *mod, *ln_obj;
-        Py_ssize_t ln;
-        int is_subclass, good_msg, good_mod;
-
-        tmp_item = PyList_GET_ITEM(filters, i);
-        if (!PyTuple_Check(tmp_item) || PyTuple_GET_SIZE(tmp_item) != 5) {
-            PyErr_Format(PyExc_ValueError,
-                         MODULE_NAME ".filters item %zd isn't a 5-tuple", i);
-            return NULL;
-        }
-
-        /* Python code: action, msg, cat, mod, ln = item */
-        Py_INCREF(tmp_item);
-        action = PyTuple_GET_ITEM(tmp_item, 0);
-        msg = PyTuple_GET_ITEM(tmp_item, 1);
-        cat = PyTuple_GET_ITEM(tmp_item, 2);
-        mod = PyTuple_GET_ITEM(tmp_item, 3);
-        ln_obj = PyTuple_GET_ITEM(tmp_item, 4);
-
-        if (!PyUnicode_Check(action)) {
-            PyErr_Format(PyExc_TypeError,
-                         "action must be a string, not '%.200s'",
-                         Py_TYPE(action)->tp_name);
-            Py_DECREF(tmp_item);
-            return NULL;
-        }
-
-        good_msg = check_matched(interp, msg, text);
-        if (good_msg == -1) {
-            Py_DECREF(tmp_item);
-            return NULL;
-        }
-
-        good_mod = check_matched(interp, mod, module);
-        if (good_mod == -1) {
-            Py_DECREF(tmp_item);
-            return NULL;
-        }
-
-        is_subclass = PyObject_IsSubclass(category, cat);
-        if (is_subclass == -1) {
-            Py_DECREF(tmp_item);
-            return NULL;
-        }
-
-        ln = PyLong_AsSsize_t(ln_obj);
-        if (ln == -1 && PyErr_Occurred()) {
-            Py_DECREF(tmp_item);
-            return NULL;
-        }
-
-        if (good_msg && is_subclass && good_mod && (ln == 0 || lineno == ln)) {
-            *item = tmp_item;
-            return action;
-        }
-
-        Py_DECREF(tmp_item);
-    }
-
-    action = get_default_action(interp);
-    if (action != NULL) {
-        *item = Py_NewRef(Py_None);
-        return action;
-    }
-
-    return NULL;
-}
-
-
-static int
-already_warned(PyInterpreterState *interp, PyObject *registry, PyObject *key,
-               int should_set)
-{
-    PyObject *version_obj, *already_warned;
-
-    if (key == NULL)
-        return -1;
-
-    WarningsState *st = warnings_get_state(interp);
-    if (st == NULL) {
-        return -1;
-    }
-    version_obj = _PyDict_GetItemWithError(registry, &_Py_ID(version));
-    if (version_obj == NULL
-        || !PyLong_CheckExact(version_obj)
-        || PyLong_AsLong(version_obj) != st->filters_version)
-    {
-        if (PyErr_Occurred()) {
-            return -1;
-        }
-        PyDict_Clear(registry);
-        version_obj = PyLong_FromLong(st->filters_version);
-        if (version_obj == NULL)
-            return -1;
-        if (PyDict_SetItem(registry, &_Py_ID(version), version_obj) < 0) {
-            Py_DECREF(version_obj);
-            return -1;
-        }
-        Py_DECREF(version_obj);
-    }
-    else {
-        already_warned = PyDict_GetItemWithError(registry, key);
-        if (already_warned != NULL) {
-            int rc = PyObject_IsTrue(already_warned);
-            if (rc != 0)
-                return rc;
-        }
-        else if (PyErr_Occurred()) {
-            return -1;
-        }
-    }
-
-    /* This warning wasn't found in the registry, set it. */
-    if (should_set)
-        return PyDict_SetItem(registry, key, Py_True);
-    return 0;
-}
-
-/* New reference. */
-static PyObject *
-normalize_module(PyObject *filename)
-{
-    PyObject *module;
-    int kind;
-    const void *data;
-    Py_ssize_t len;
-
-    len = PyUnicode_GetLength(filename);
-    if (len < 0)
-        return NULL;
-
-    if (len == 0)
-        return PyUnicode_FromString("<unknown>");
-
-    kind = PyUnicode_KIND(filename);
-    data = PyUnicode_DATA(filename);
-
-    /* if filename.endswith(".py"): */
-    if (len >= 3 &&
-        PyUnicode_READ(kind, data, len-3) == '.' &&
-        PyUnicode_READ(kind, data, len-2) == 'p' &&
-        PyUnicode_READ(kind, data, len-1) == 'y')
-    {
-        module = PyUnicode_Substring(filename, 0, len-3);
-    }
-    else {
-        module = Py_NewRef(filename);
-    }
-    return module;
-}
-
-static int
-update_registry(PyInterpreterState *interp, PyObject *registry, PyObject *text,
-                PyObject *category, int add_zero)
-{
-    PyObject *altkey;
-    int rc;
-
-    if (add_zero)
-        altkey = PyTuple_Pack(3, text, category, _PyLong_GetZero());
-    else
-        altkey = PyTuple_Pack(2, text, category);
-
-    rc = already_warned(interp, registry, altkey, 1);
-    Py_XDECREF(altkey);
-    return rc;
-}
-
-static void
-show_warning(PyThreadState *tstate, PyObject *filename, int lineno,
-             PyObject *text, PyObject *category, PyObject *sourceline)
-{
-    PyObject *f_stderr;
-    PyObject *name;
-    char lineno_str[128];
-
-    PyOS_snprintf(lineno_str, sizeof(lineno_str), ":%d: ", lineno);
-
-    name = PyObject_GetAttr(category, &_Py_ID(__name__));
-    if (name == NULL) {
-        goto error;
-    }
-
-    f_stderr = _PySys_GetAttr(tstate, &_Py_ID(stderr));
-    if (f_stderr == NULL) {
-        fprintf(stderr, "lost sys.stderr\n");
-        goto error;
-    }
-
-    /* Print "filename:lineno: category: text\n" */
-    if (PyFile_WriteObject(filename, f_stderr, Py_PRINT_RAW) < 0)
-        goto error;
-    if (PyFile_WriteString(lineno_str, f_stderr) < 0)
-        goto error;
-    if (PyFile_WriteObject(name, f_stderr, Py_PRINT_RAW) < 0)
-        goto error;
-    if (PyFile_WriteString(": ", f_stderr) < 0)
-        goto error;
-    if (PyFile_WriteObject(text, f_stderr, Py_PRINT_RAW) < 0)
-        goto error;
-    if (PyFile_WriteString("\n", f_stderr) < 0)
-        goto error;
-    Py_CLEAR(name);
-
-    /* Print "  source_line\n" */
-    if (sourceline) {
-        int kind;
-        const void *data;
-        Py_ssize_t i, len;
-        Py_UCS4 ch;
-        PyObject *truncated;
-
-        if (PyUnicode_READY(sourceline) < 1)
-            goto error;
-
-        kind = PyUnicode_KIND(sourceline);
-        data = PyUnicode_DATA(sourceline);
-        len = PyUnicode_GET_LENGTH(sourceline);
-        for (i=0; i<len; i++) {
-            ch = PyUnicode_READ(kind, data, i);
-            if (ch != ' ' && ch != '\t' && ch != '\014')
-                break;
-        }
-
-        truncated = PyUnicode_Substring(sourceline, i, len);
-        if (truncated == NULL)
-            goto error;
-
-        PyFile_WriteObject(sourceline, f_stderr, Py_PRINT_RAW);
-        Py_DECREF(truncated);
-        PyFile_WriteString("\n", f_stderr);
-    }
-    else {
-        _Py_DisplaySourceLine(f_stderr, filename, lineno, 2, NULL, NULL);
-    }
-
-error:
-    Py_XDECREF(name);
-    PyErr_Clear();
-}
-
-static int
-call_show_warning(PyThreadState *tstate, PyObject *category,
-                  PyObject *text, PyObject *message,
-                  PyObject *filename, int lineno, PyObject *lineno_obj,
-                  PyObject *sourceline, PyObject *source)
-{
-    PyObject *show_fn, *msg, *res, *warnmsg_cls = NULL;
-    PyInterpreterState *interp = tstate->interp;
-
-    /* If the source parameter is set, try to get the Python implementation.
-       The Python implementation is able to log the traceback where the source
-       was allocated, whereas the C implementation doesn't. */
-    show_fn = GET_WARNINGS_ATTR(interp, _showwarnmsg, source != NULL);
-    if (show_fn == NULL) {
-        if (PyErr_Occurred())
-            return -1;
-        show_warning(tstate, filename, lineno, text, category, sourceline);
-        return 0;
-    }
-
-    if (!PyCallable_Check(show_fn)) {
-        PyErr_SetString(PyExc_TypeError,
-                "warnings._showwarnmsg() must be set to a callable");
-        goto error;
-    }
-
-    warnmsg_cls = GET_WARNINGS_ATTR(interp, WarningMessage, 0);
-    if (warnmsg_cls == NULL) {
-        if (!PyErr_Occurred()) {
-            PyErr_SetString(PyExc_RuntimeError,
-                    "unable to get warnings.WarningMessage");
-        }
-        goto error;
-    }
-
-    msg = PyObject_CallFunctionObjArgs(warnmsg_cls, message, category,
-            filename, lineno_obj, Py_None, Py_None, source,
-            NULL);
-    Py_DECREF(warnmsg_cls);
-    if (msg == NULL)
-        goto error;
-
-    res = PyObject_CallOneArg(show_fn, msg);
-    Py_DECREF(show_fn);
-    Py_DECREF(msg);
-
-    if (res == NULL)
-        return -1;
-
-    Py_DECREF(res);
-    return 0;
-
-error:
-    Py_XDECREF(show_fn);
-    return -1;
-}
-
-static PyObject *
-warn_explicit(PyThreadState *tstate, PyObject *category, PyObject *message,
-              PyObject *filename, int lineno,
-              PyObject *module, PyObject *registry, PyObject *sourceline,
-              PyObject *source)
-{
-    PyObject *key = NULL, *text = NULL, *result = NULL, *lineno_obj = NULL;
-    PyObject *item = NULL;
-    PyObject *action;
-    int rc;
-    PyInterpreterState *interp = tstate->interp;
-
-    /* module can be None if a warning is emitted late during Python shutdown.
-       In this case, the Python warnings module was probably unloaded, filters
-       are no more available to choose as action. It is safer to ignore the
-       warning and do nothing. */
-    if (module == Py_None)
-        Py_RETURN_NONE;
-
-    if (registry && !PyDict_Check(registry) && (registry != Py_None)) {
-        PyErr_SetString(PyExc_TypeError, "'registry' must be a dict or None");
-        return NULL;
-    }
-
-    /* Normalize module. */
-    if (module == NULL) {
-        module = normalize_module(filename);
-        if (module == NULL)
-            return NULL;
-    }
-    else
-        Py_INCREF(module);
-
-    /* Normalize message. */
-    Py_INCREF(message);  /* DECREF'ed in cleanup. */
-    rc = PyObject_IsInstance(message, PyExc_Warning);
-    if (rc == -1) {
-        goto cleanup;
-    }
-    if (rc == 1) {
-        text = PyObject_Str(message);
-        if (text == NULL)
-            goto cleanup;
-        category = (PyObject*)Py_TYPE(message);
-    }
-    else {
-        text = message;
-        message = PyObject_CallOneArg(category, message);
-        if (message == NULL)
-            goto cleanup;
-    }
-
-    lineno_obj = PyLong_FromLong(lineno);
-    if (lineno_obj == NULL)
-        goto cleanup;
-
-    if (source == Py_None) {
-        source = NULL;
-    }
-
-    /* Create key. */
-    key = PyTuple_Pack(3, text, category, lineno_obj);
-    if (key == NULL)
-        goto cleanup;
-
-    if ((registry != NULL) && (registry != Py_None)) {
-        rc = already_warned(interp, registry, key, 0);
-        if (rc == -1)
-            goto cleanup;
-        else if (rc == 1)
-            goto return_none;
-        /* Else this warning hasn't been generated before. */
-    }
-
-    action = get_filter(interp, category, text, lineno, module, &item);
-    if (action == NULL)
-        goto cleanup;
-
-    if (_PyUnicode_EqualToASCIIString(action, "error")) {
-        PyErr_SetObject(category, message);
-        goto cleanup;
-    }
-
-    if (_PyUnicode_EqualToASCIIString(action, "ignore")) {
-        goto return_none;
-    }
-
-    /* Store in the registry that we've been here, *except* when the action
-       is "always". */
-    rc = 0;
-    if (!_PyUnicode_EqualToASCIIString(action, "always")) {
-        if (registry != NULL && registry != Py_None &&
-            PyDict_SetItem(registry, key, Py_True) < 0)
-        {
-            goto cleanup;
-        }
-
-        if (_PyUnicode_EqualToASCIIString(action, "once")) {
-            if (registry == NULL || registry == Py_None) {
-                registry = get_once_registry(interp);
-                if (registry == NULL)
-                    goto cleanup;
-            }
-            /* WarningsState.once_registry[(text, category)] = 1 */
-            rc = update_registry(interp, registry, text, category, 0);
-        }
-        else if (_PyUnicode_EqualToASCIIString(action, "module")) {
-            /* registry[(text, category, 0)] = 1 */
-            if (registry != NULL && registry != Py_None)
-                rc = update_registry(interp, registry, text, category, 0);
-        }
-        else if (!_PyUnicode_EqualToASCIIString(action, "default")) {
-            PyErr_Format(PyExc_RuntimeError,
-                        "Unrecognized action (%R) in warnings.filters:\n %R",
-                        action, item);
-            goto cleanup;
-        }
-    }
-
-    if (rc == 1)  /* Already warned for this module. */
-        goto return_none;
-    if (rc == 0) {
-        if (call_show_warning(tstate, category, text, message, filename,
-                              lineno, lineno_obj, sourceline, source) < 0)
-            goto cleanup;
-    }
-    else /* if (rc == -1) */
-        goto cleanup;
-
- return_none:
-    result = Py_NewRef(Py_None);
-
- cleanup:
-    Py_XDECREF(item);
-    Py_XDECREF(key);
-    Py_XDECREF(text);
-    Py_XDECREF(lineno_obj);
-    Py_DECREF(module);
-    Py_XDECREF(message);
-    return result;  /* Py_None or NULL. */
-}
-
-static PyObject *
-get_frame_filename(PyFrameObject *frame)
-{
-    PyCodeObject *code = PyFrame_GetCode(frame);
-    PyObject *filename = code->co_filename;
-    Py_DECREF(code);
-    return filename;
-}
-
-static bool
-is_internal_filename(PyObject *filename)
-{
-    if (!PyUnicode_Check(filename)) {
-        return false;
-    }
-
-    int contains = PyUnicode_Contains(filename, &_Py_ID(importlib));
-    if (contains < 0) {
-        return false;
-    }
-    else if (contains > 0) {
-        contains = PyUnicode_Contains(filename, &_Py_ID(_bootstrap));
-        if (contains < 0) {
-            return false;
-        }
-        else if (contains > 0) {
-            return true;
-        }
-    }
-
-    return false;
-}
-
-static bool
-is_filename_to_skip(PyObject *filename, PyTupleObject *skip_file_prefixes)
-{
-    if (skip_file_prefixes) {
-        if (!PyUnicode_Check(filename)) {
-            return false;
-        }
-
-        Py_ssize_t prefixes = PyTuple_GET_SIZE(skip_file_prefixes);
-        for (Py_ssize_t idx = 0; idx < prefixes; ++idx)
-        {
-            PyObject *prefix = PyTuple_GET_ITEM(skip_file_prefixes, idx);
-            Py_ssize_t found = PyUnicode_Tailmatch(filename, prefix, 0, -1, -1);
-            if (found == 1) {
-                return true;
-            }
-            if (found < 0) {
-                return false;
-            }
-        }
-    }
-    return false;
-}
-
-static bool
-is_internal_frame(PyFrameObject *frame)
-{
-    if (frame == NULL) {
-        return false;
-    }
-
-    PyObject *filename = get_frame_filename(frame);
-    if (filename == NULL) {
-        return false;
-    }
-
-    return is_internal_filename(filename);
-}
-
-static PyFrameObject *
-next_external_frame(PyFrameObject *frame, PyTupleObject *skip_file_prefixes)
-{
-    PyObject *frame_filename;
-    do {
-        PyFrameObject *back = PyFrame_GetBack(frame);
-        Py_SETREF(frame, back);
-    } while (frame != NULL && (frame_filename = get_frame_filename(frame)) &&
-             (is_internal_filename(frame_filename) ||
-              is_filename_to_skip(frame_filename, skip_file_prefixes)));
-
-    return frame;
-}
-
-/* filename, module, and registry are new refs, globals is borrowed */
-/* skip_file_prefixes is either NULL or a tuple of strs. */
-/* Returns 0 on error (no new refs), 1 on success */
-static int
-setup_context(Py_ssize_t stack_level,
-              PyTupleObject *skip_file_prefixes,
-              PyObject **filename, int *lineno,
-              PyObject **module, PyObject **registry)
-{
-    PyObject *globals;
-
-    /* Setup globals, filename and lineno. */
-    PyThreadState *tstate = get_current_tstate();
-    if (tstate == NULL) {
-        return 0;
-    }
-    if (skip_file_prefixes) {
-        /* Type check our data structure up front. Later code that uses it
-         * isn't structured to report errors. */
-        Py_ssize_t prefixes = PyTuple_GET_SIZE(skip_file_prefixes);
-        for (Py_ssize_t idx = 0; idx < prefixes; ++idx)
-        {
-            PyObject *prefix = PyTuple_GET_ITEM(skip_file_prefixes, idx);
-            if (!PyUnicode_Check(prefix)) {
-                PyErr_Format(PyExc_TypeError,
-                             "Found non-str '%s' in skip_file_prefixes.",
-                             Py_TYPE(prefix)->tp_name);
-                return 0;
-            }
-        }
-    }
-    PyInterpreterState *interp = tstate->interp;
-    PyFrameObject *f = PyThreadState_GetFrame(tstate);
-    // Stack level comparisons to Python code is off by one as there is no
-    // warnings-related stack level to avoid.
-    if (stack_level <= 0 || is_internal_frame(f)) {
-        while (--stack_level > 0 && f != NULL) {
-            PyFrameObject *back = PyFrame_GetBack(f);
-            Py_SETREF(f, back);
-        }
-    }
-    else {
-        while (--stack_level > 0 && f != NULL) {
-            f = next_external_frame(f, skip_file_prefixes);
-        }
-    }
-
-    if (f == NULL) {
-        globals = interp->sysdict;
-        *filename = PyUnicode_FromString("sys");
-        *lineno = 1;
-    }
-    else {
-        globals = f->f_frame->f_globals;
-        *filename = Py_NewRef(f->f_frame->f_code->co_filename);
-        *lineno = PyFrame_GetLineNumber(f);
-        Py_DECREF(f);
-    }
-
-    *module = NULL;
-
-    /* Setup registry. */
-    assert(globals != NULL);
-    assert(PyDict_Check(globals));
-    *registry = _PyDict_GetItemWithError(globals, &_Py_ID(__warningregistry__));
-    if (*registry == NULL) {
-        int rc;
-
-        if (_PyErr_Occurred(tstate)) {
-            goto handle_error;
-        }
-        *registry = PyDict_New();
-        if (*registry == NULL)
-            goto handle_error;
-
-         rc = PyDict_SetItem(globals, &_Py_ID(__warningregistry__), *registry);
-         if (rc < 0)
-            goto handle_error;
-    }
-    else
-        Py_INCREF(*registry);
-
-    /* Setup module. */
-    *module = _PyDict_GetItemWithError(globals, &_Py_ID(__name__));
-    if (*module == Py_None || (*module != NULL && PyUnicode_Check(*module))) {
-        Py_INCREF(*module);
-    }
-    else if (_PyErr_Occurred(tstate)) {
-        goto handle_error;
-    }
-    else {
-        *module = PyUnicode_FromString("<string>");
-        if (*module == NULL)
-            goto handle_error;
-    }
-
-    return 1;
-
- handle_error:
-    Py_XDECREF(*registry);
-    Py_XDECREF(*module);
-    Py_DECREF(*filename);
-    return 0;
-}
-
-static PyObject *
-get_category(PyObject *message, PyObject *category)
-{
-    int rc;
-
-    /* Get category. */
-    rc = PyObject_IsInstance(message, PyExc_Warning);
-    if (rc == -1)
-        return NULL;
-
-    if (rc == 1)
-        category = (PyObject*)Py_TYPE(message);
-    else if (category == NULL || category == Py_None)
-        category = PyExc_UserWarning;
-
-    /* Validate category. */
-    rc = PyObject_IsSubclass(category, PyExc_Warning);
-    /* category is not a subclass of PyExc_Warning or
-       PyObject_IsSubclass raised an error */
-    if (rc == -1 || rc == 0) {
-        PyErr_Format(PyExc_TypeError,
-                     "category must be a Warning subclass, not '%s'",
-                     Py_TYPE(category)->tp_name);
-        return NULL;
-    }
-
-    return category;
-}
-
-static PyObject *
-do_warn(PyObject *message, PyObject *category, Py_ssize_t stack_level,
-        PyObject *source, PyTupleObject *skip_file_prefixes)
-{
-    PyObject *filename, *module, *registry, *res;
-    int lineno;
-
-    PyThreadState *tstate = get_current_tstate();
-    if (tstate == NULL) {
-        return NULL;
-    }
-
-    if (!setup_context(stack_level, skip_file_prefixes,
-                       &filename, &lineno, &module, &registry))
-        return NULL;
-
-    res = warn_explicit(tstate, category, message, filename, lineno, module, registry,
-                        NULL, source);
-    Py_DECREF(filename);
-    Py_DECREF(registry);
-    Py_DECREF(module);
-    return res;
-}
-
-/*[clinic input]
-warn as warnings_warn
-
-    message: object
-      Text of the warning message.
-    category: object = None
-      The Warning category subclass. Defaults to UserWarning.
-    stacklevel: Py_ssize_t = 1
-      How far up the call stack to make this warning appear. A value of 2 for
-      example attributes the warning to the caller of the code calling warn().
-    source: object = None
-      If supplied, the destroyed object which emitted a ResourceWarning
-    *
-    skip_file_prefixes: object(type='PyTupleObject *', subclass_of='&PyTuple_Type') = NULL
-      An optional tuple of module filename prefixes indicating frames to skip
-      during stacklevel computations for stack frame attribution.
-
-Issue a warning, or maybe ignore it or raise an exception.
-[clinic start generated code]*/
-
-static PyObject *
-warnings_warn_impl(PyObject *module, PyObject *message, PyObject *category,
-                   Py_ssize_t stacklevel, PyObject *source,
-                   PyTupleObject *skip_file_prefixes)
-/*[clinic end generated code: output=a68e0f6906c65f80 input=eb37c6a18bec4ea1]*/
-{
-    category = get_category(message, category);
-    if (category == NULL)
-        return NULL;
-    if (skip_file_prefixes) {
-        if (PyTuple_GET_SIZE(skip_file_prefixes) > 0) {
-            if (stacklevel < 2) {
-                stacklevel = 2;
-            }
-        } else {
-            Py_DECREF((PyObject *)skip_file_prefixes);
-            skip_file_prefixes = NULL;
-        }
-    }
-    return do_warn(message, category, stacklevel, source, skip_file_prefixes);
-}
-
-static PyObject *
-get_source_line(PyInterpreterState *interp, PyObject *module_globals, int lineno)
-{
-    PyObject *loader;
-    PyObject *module_name;
-    PyObject *get_source;
-    PyObject *source;
-    PyObject *source_list;
-    PyObject *source_line;
-
-    /* stolen from import.c */
-    loader = _PyImport_BlessMyLoader(interp, module_globals);
-    if (loader == NULL) {
-        return NULL;
-    }
-
-    module_name = _PyDict_GetItemWithError(module_globals, &_Py_ID(__name__));
-    if (!module_name) {
-        Py_DECREF(loader);
-        return NULL;
-    }
-    Py_INCREF(module_name);
-
-    /* Make sure the loader implements the optional get_source() method. */
-    (void)_PyObject_LookupAttr(loader, &_Py_ID(get_source), &get_source);
-    Py_DECREF(loader);
-    if (!get_source) {
-        Py_DECREF(module_name);
-        return NULL;
-    }
-    /* Call get_source() to get the source code. */
-    source = PyObject_CallOneArg(get_source, module_name);
-    Py_DECREF(get_source);
-    Py_DECREF(module_name);
-    if (!source) {
-        return NULL;
-    }
-    if (source == Py_None) {
-        Py_DECREF(source);
-        return NULL;
-    }
-
-    /* Split the source into lines. */
-    source_list = PyUnicode_Splitlines(source, 0);
-    Py_DECREF(source);
-    if (!source_list) {
-        return NULL;
-    }
-
-    /* Get the source line. */
-    source_line = PyList_GetItem(source_list, lineno-1);
-    Py_XINCREF(source_line);
-    Py_DECREF(source_list);
-    return source_line;
-}
-
-/*[clinic input]
-warn_explicit as warnings_warn_explicit
-
-    message: object
-    category: object
-    filename: unicode
-    lineno: int
-    module as mod: object = NULL
-    registry: object = None
-    module_globals: object = None
-    source as sourceobj: object = None
-
-Issue a warning, or maybe ignore it or raise an exception.
-[clinic start generated code]*/
-
-static PyObject *
-warnings_warn_explicit_impl(PyObject *module, PyObject *message,
-                            PyObject *category, PyObject *filename,
-                            int lineno, PyObject *mod, PyObject *registry,
-                            PyObject *module_globals, PyObject *sourceobj)
-/*[clinic end generated code: output=c49c62b15a49a186 input=df6eeb8b45e712f1]*/
-{
-    PyObject *source_line = NULL;
-    PyObject *returned;
-
-    PyThreadState *tstate = get_current_tstate();
-    if (tstate == NULL) {
-        return NULL;
-    }
-
-    if (module_globals && module_globals != Py_None) {
-        if (!PyDict_Check(module_globals)) {
-            PyErr_Format(PyExc_TypeError,
-                         "module_globals must be a dict, not '%.200s'",
-                         Py_TYPE(module_globals)->tp_name);
-            return NULL;
-        }
-
-        source_line = get_source_line(tstate->interp, module_globals, lineno);
-        if (source_line == NULL && PyErr_Occurred()) {
-            return NULL;
-        }
-    }
-    returned = warn_explicit(tstate, category, message, filename, lineno,
-                             mod, registry, source_line, sourceobj);
-    Py_XDECREF(source_line);
-    return returned;
-}
-
-/*[clinic input]
-_filters_mutated as warnings_filters_mutated
-
-[clinic start generated code]*/
-
-static PyObject *
-warnings_filters_mutated_impl(PyObject *module)
-/*[clinic end generated code: output=8ce517abd12b88f4 input=35ecbf08ee2491b2]*/
-{
-    PyInterpreterState *interp = get_current_interp();
-    if (interp == NULL) {
-        return NULL;
-    }
-    WarningsState *st = warnings_get_state(interp);
-    if (st == NULL) {
-        return NULL;
-    }
-    st->filters_version++;
-    Py_RETURN_NONE;
-}
-
-
-/* Function to issue a warning message; may raise an exception. */
-
-static int
-warn_unicode(PyObject *category, PyObject *message,
-             Py_ssize_t stack_level, PyObject *source)
-{
-    PyObject *res;
-
-    if (category == NULL)
-        category = PyExc_RuntimeWarning;
-
-    res = do_warn(message, category, stack_level, source, NULL);
-    if (res == NULL)
-        return -1;
-    Py_DECREF(res);
-
-    return 0;
-}
-
-static int
-_PyErr_WarnFormatV(PyObject *source,
-                   PyObject *category, Py_ssize_t stack_level,
-                   const char *format, va_list vargs)
-{
-    PyObject *message;
-    int res;
-
-    message = PyUnicode_FromFormatV(format, vargs);
-    if (message == NULL)
-        return -1;
-
-    res = warn_unicode(category, message, stack_level, source);
-    Py_DECREF(message);
-    return res;
-}
-
-int
-PyErr_WarnFormat(PyObject *category, Py_ssize_t stack_level,
-                 const char *format, ...)
-{
-    int res;
-    va_list vargs;
-
-    va_start(vargs, format);
-    res = _PyErr_WarnFormatV(NULL, category, stack_level, format, vargs);
-    va_end(vargs);
-    return res;
-}
-
-static int
-_PyErr_WarnFormat(PyObject *source, PyObject *category, Py_ssize_t stack_level,
-                  const char *format, ...)
-{
-    int res;
-    va_list vargs;
-
-    va_start(vargs, format);
-    res = _PyErr_WarnFormatV(source, category, stack_level, format, vargs);
-    va_end(vargs);
-    return res;
-}
-
-int
-PyErr_ResourceWarning(PyObject *source, Py_ssize_t stack_level,
-                      const char *format, ...)
-{
-    int res;
-    va_list vargs;
-
-    va_start(vargs, format);
-    res = _PyErr_WarnFormatV(source, PyExc_ResourceWarning,
-                             stack_level, format, vargs);
-    va_end(vargs);
-    return res;
-}
-
-
-int
-PyErr_WarnEx(PyObject *category, const char *text, Py_ssize_t stack_level)
-{
-    int ret;
-    PyObject *message = PyUnicode_FromString(text);
-    if (message == NULL)
-        return -1;
-    ret = warn_unicode(category, message, stack_level, NULL);
-    Py_DECREF(message);
-    return ret;
-}
-
-/* PyErr_Warn is only for backwards compatibility and will be removed.
-   Use PyErr_WarnEx instead. */
-
-#undef PyErr_Warn
-
-int
-PyErr_Warn(PyObject *category, const char *text)
-{
-    return PyErr_WarnEx(category, text, 1);
-}
-
-/* Warning with explicit origin */
-int
-PyErr_WarnExplicitObject(PyObject *category, PyObject *message,
-                         PyObject *filename, int lineno,
-                         PyObject *module, PyObject *registry)
-{
-    PyObject *res;
-    if (category == NULL)
-        category = PyExc_RuntimeWarning;
-    PyThreadState *tstate = get_current_tstate();
-    if (tstate == NULL) {
-        return -1;
-    }
-    res = warn_explicit(tstate, category, message, filename, lineno,
-                        module, registry, NULL, NULL);
-    if (res == NULL)
-        return -1;
-    Py_DECREF(res);
-    return 0;
-}
-
-int
-PyErr_WarnExplicit(PyObject *category, const char *text,
-                   const char *filename_str, int lineno,
-                   const char *module_str, PyObject *registry)
-{
-    PyObject *message = PyUnicode_FromString(text);
-    if (message == NULL) {
-        return -1;
-    }
-    PyObject *filename = PyUnicode_DecodeFSDefault(filename_str);
-    if (filename == NULL) {
-        Py_DECREF(message);
-        return -1;
-    }
-    PyObject *module = NULL;
-    if (module_str != NULL) {
-        module = PyUnicode_FromString(module_str);
-        if (module == NULL) {
-            Py_DECREF(filename);
-            Py_DECREF(message);
-            return -1;
-        }
-    }
-
-    int ret = PyErr_WarnExplicitObject(category, message, filename, lineno,
-                                       module, registry);
-    Py_XDECREF(module);
-    Py_DECREF(filename);
-    Py_DECREF(message);
-    return ret;
-}
-
-int
-PyErr_WarnExplicitFormat(PyObject *category,
-                         const char *filename_str, int lineno,
-                         const char *module_str, PyObject *registry,
-                         const char *format, ...)
-{
-    PyObject *message;
-    PyObject *module = NULL;
-    PyObject *filename = PyUnicode_DecodeFSDefault(filename_str);
-    int ret = -1;
-    va_list vargs;
-
-    if (filename == NULL)
-        goto exit;
-    if (module_str != NULL) {
-        module = PyUnicode_FromString(module_str);
-        if (module == NULL)
-            goto exit;
-    }
-
-    va_start(vargs, format);
-    message = PyUnicode_FromFormatV(format, vargs);
-    if (message != NULL) {
-        PyObject *res;
-        PyThreadState *tstate = get_current_tstate();
-        if (tstate != NULL) {
-            res = warn_explicit(tstate, category, message, filename, lineno,
-                                module, registry, NULL, NULL);
-            Py_DECREF(message);
-            if (res != NULL) {
-                Py_DECREF(res);
-                ret = 0;
-            }
-        }
-    }
-    va_end(vargs);
-exit:
-    Py_XDECREF(module);
-    Py_XDECREF(filename);
-    return ret;
-}
-
-void
-_PyErr_WarnUnawaitedCoroutine(PyObject *coro)
-{
-    /* First, we attempt to funnel the warning through
-       warnings._warn_unawaited_coroutine.
-
-       This could raise an exception, due to:
-       - a bug
-       - some kind of shutdown-related brokenness
-       - succeeding, but with an "error" warning filter installed, so the
-         warning is converted into a RuntimeWarning exception
-
-       In the first two cases, we want to print the error (so we know what it
-       is!), and then print a warning directly as a fallback. In the last
-       case, we want to print the error (since it's the warning!), but *not*
-       do a fallback. And after we print the error we can't check for what
-       type of error it was (because PyErr_WriteUnraisable clears it), so we
-       need a flag to keep track.
-
-       Since this is called from __del__ context, it's careful to never raise
-       an exception.
-    */
-    int warned = 0;
-    PyInterpreterState *interp = _PyInterpreterState_GET();
-    assert(interp != NULL);
-    PyObject *fn = GET_WARNINGS_ATTR(interp, _warn_unawaited_coroutine, 1);
-    if (fn) {
-        PyObject *res = PyObject_CallOneArg(fn, coro);
-        Py_DECREF(fn);
-        if (res || PyErr_ExceptionMatches(PyExc_RuntimeWarning)) {
-            warned = 1;
-        }
-        Py_XDECREF(res);
-    }
-
-    if (PyErr_Occurred()) {
-        PyErr_WriteUnraisable(coro);
-    }
-    if (!warned) {
-        if (_PyErr_WarnFormat(coro, PyExc_RuntimeWarning, 1,
-                              "coroutine '%S' was never awaited",
-                              ((PyCoroObject *)coro)->cr_qualname) < 0)
-        {
-            PyErr_WriteUnraisable(coro);
-        }
-    }
-}
-
-static PyMethodDef warnings_functions[] = {
-    WARNINGS_WARN_METHODDEF
-    WARNINGS_WARN_EXPLICIT_METHODDEF
-    WARNINGS_FILTERS_MUTATED_METHODDEF
-    /* XXX(brett.cannon): add showwarning? */
-    /* XXX(brett.cannon): Reasonable to add formatwarning? */
-    {NULL, NULL}                /* sentinel */
-};
-
-
-static int
-warnings_module_exec(PyObject *module)
-{
-    PyInterpreterState *interp = get_current_interp();
-    if (interp == NULL) {
-        return -1;
-    }
-    WarningsState *st = warnings_get_state(interp);
-    if (st == NULL) {
-        return -1;
-    }
-    if (PyModule_AddObjectRef(module, "filters", st->filters) < 0) {
-        return -1;
-    }
-    if (PyModule_AddObjectRef(module, "_onceregistry", st->once_registry) < 0) {
-        return -1;
-    }
-    if (PyModule_AddObjectRef(module, "_defaultaction", st->default_action) < 0) {
-        return -1;
-    }
-    return 0;
-}
-
-
-static PyModuleDef_Slot warnings_slots[] = {
-    {Py_mod_exec, warnings_module_exec},
-    {Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
-    {0, NULL}
-};
-
-static struct PyModuleDef warnings_module = {
-    PyModuleDef_HEAD_INIT,
-    .m_name = MODULE_NAME,
-    .m_doc = warnings__doc__,
-    .m_size = 0,
-    .m_methods = warnings_functions,
-    .m_slots = warnings_slots,
-};
-
-
-PyMODINIT_FUNC
-_PyWarnings_Init(void)
-{
-    return PyModuleDef_Init(&warnings_module);
-}
-
-// We need this to ensure that warnings still work until late in finalization.
-void
-_PyWarnings_Fini(PyInterpreterState *interp)
-{
-    warnings_clear_state(&interp->warnings);
-}