add ydb deps

1 files changed, 1864 insertions, 0 deletions

diff --git a/contrib/tools/python3/src/Python/errors.c b/contrib/tools/python3/src/Python/errors.c
new file mode 100644
index 0000000000..8e150c3d00
--- /dev/null
+++ b/contrib/tools/python3/src/Python/errors.c
@@ -0,0 +1,1864 @@
+
+/* Error handling */
+
+#include "Python.h"
+#include "pycore_call.h"          // _PyObject_CallNoArgs()
+#include "pycore_initconfig.h"    // _PyStatus_ERR()
+#include "pycore_pyerrors.h"      // _PyErr_Format()
+#include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_structseq.h"     // _PyStructSequence_FiniType()
+#include "pycore_sysmodule.h"     // _PySys_Audit()
+#include "pycore_traceback.h"     // _PyTraceBack_FromFrame()
+
+#include <ctype.h>
+#ifdef MS_WINDOWS
+#  include <windows.h>
+#  include <winbase.h>
+#  include <stdlib.h>             // _sys_nerr
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Forward declarations */
+static PyObject *
+_PyErr_FormatV(PyThreadState *tstate, PyObject *exception,
+               const char *format, va_list vargs);
+
+
+void
+_PyErr_Restore(PyThreadState *tstate, PyObject *type, PyObject *value,
+               PyObject *traceback)
+{
+    PyObject *oldtype, *oldvalue, *oldtraceback;
+
+    if (traceback != NULL && !PyTraceBack_Check(traceback)) {
+        /* XXX Should never happen -- fatal error instead? */
+        /* Well, it could be None. */
+        Py_DECREF(traceback);
+        traceback = NULL;
+    }
+
+    /* Save these in locals to safeguard against recursive
+       invocation through Py_XDECREF */
+    oldtype = tstate->curexc_type;
+    oldvalue = tstate->curexc_value;
+    oldtraceback = tstate->curexc_traceback;
+
+    tstate->curexc_type = type;
+    tstate->curexc_value = value;
+    tstate->curexc_traceback = traceback;
+
+    Py_XDECREF(oldtype);
+    Py_XDECREF(oldvalue);
+    Py_XDECREF(oldtraceback);
+}
+
+void
+PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_Restore(tstate, type, value, traceback);
+}
+
+
+_PyErr_StackItem *
+_PyErr_GetTopmostException(PyThreadState *tstate)
+{
+    _PyErr_StackItem *exc_info = tstate->exc_info;
+    assert(exc_info);
+
+    while ((exc_info->exc_value == NULL || exc_info->exc_value == Py_None) &&
+           exc_info->previous_item != NULL)
+    {
+        exc_info = exc_info->previous_item;
+    }
+    return exc_info;
+}
+
+static PyObject*
+_PyErr_CreateException(PyObject *exception_type, PyObject *value)
+{
+    PyObject *exc;
+
+    if (value == NULL || value == Py_None) {
+        exc = _PyObject_CallNoArgs(exception_type);
+    }
+    else if (PyTuple_Check(value)) {
+        exc = PyObject_Call(exception_type, value, NULL);
+    }
+    else {
+        exc = PyObject_CallOneArg(exception_type, value);
+    }
+
+    if (exc != NULL && !PyExceptionInstance_Check(exc)) {
+        PyErr_Format(PyExc_TypeError,
+                     "calling %R should have returned an instance of "
+                     "BaseException, not %s",
+                     exception_type, Py_TYPE(exc)->tp_name);
+        Py_CLEAR(exc);
+    }
+
+    return exc;
+}
+
+void
+_PyErr_SetObject(PyThreadState *tstate, PyObject *exception, PyObject *value)
+{
+    PyObject *exc_value;
+    PyObject *tb = NULL;
+
+    if (exception != NULL &&
+        !PyExceptionClass_Check(exception)) {
+        _PyErr_Format(tstate, PyExc_SystemError,
+                      "_PyErr_SetObject: "
+                      "exception %R is not a BaseException subclass",
+                      exception);
+        return;
+    }
+
+    Py_XINCREF(value);
+    exc_value = _PyErr_GetTopmostException(tstate)->exc_value;
+    if (exc_value != NULL && exc_value != Py_None) {
+        /* Implicit exception chaining */
+        Py_INCREF(exc_value);
+        if (value == NULL || !PyExceptionInstance_Check(value)) {
+            /* We must normalize the value right now */
+            PyObject *fixed_value;
+
+            /* Issue #23571: functions must not be called with an
+               exception set */
+            _PyErr_Clear(tstate);
+
+            fixed_value = _PyErr_CreateException(exception, value);
+            Py_XDECREF(value);
+            if (fixed_value == NULL) {
+                Py_DECREF(exc_value);
+                return;
+            }
+
+            value = fixed_value;
+        }
+
+        /* Avoid creating new reference cycles through the
+           context chain, while taking care not to hang on
+           pre-existing ones.
+           This is O(chain length) but context chains are
+           usually very short. Sensitive readers may try
+           to inline the call to PyException_GetContext. */
+        if (exc_value != value) {
+            PyObject *o = exc_value, *context;
+            PyObject *slow_o = o;  /* Floyd's cycle detection algo */
+            int slow_update_toggle = 0;
+            while ((context = PyException_GetContext(o))) {
+                Py_DECREF(context);
+                if (context == value) {
+                    PyException_SetContext(o, NULL);
+                    break;
+                }
+                o = context;
+                if (o == slow_o) {
+                    /* pre-existing cycle - all exceptions on the
+                       path were visited and checked.  */
+                    break;
+                }
+                if (slow_update_toggle) {
+                    slow_o = PyException_GetContext(slow_o);
+                    Py_DECREF(slow_o);
+                }
+                slow_update_toggle = !slow_update_toggle;
+            }
+            PyException_SetContext(value, exc_value);
+        }
+        else {
+            Py_DECREF(exc_value);
+        }
+    }
+    if (value != NULL && PyExceptionInstance_Check(value))
+        tb = PyException_GetTraceback(value);
+    Py_XINCREF(exception);
+    _PyErr_Restore(tstate, exception, value, tb);
+}
+
+void
+PyErr_SetObject(PyObject *exception, PyObject *value)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_SetObject(tstate, exception, value);
+}
+
+/* Set a key error with the specified argument, wrapping it in a
+ * tuple automatically so that tuple keys are not unpacked as the
+ * exception arguments. */
+void
+_PyErr_SetKeyError(PyObject *arg)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    PyObject *tup = PyTuple_Pack(1, arg);
+    if (!tup) {
+        /* caller will expect error to be set anyway */
+        return;
+    }
+    _PyErr_SetObject(tstate, PyExc_KeyError, tup);
+    Py_DECREF(tup);
+}
+
+void
+_PyErr_SetNone(PyThreadState *tstate, PyObject *exception)
+{
+    _PyErr_SetObject(tstate, exception, (PyObject *)NULL);
+}
+
+
+void
+PyErr_SetNone(PyObject *exception)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_SetNone(tstate, exception);
+}
+
+
+void
+_PyErr_SetString(PyThreadState *tstate, PyObject *exception,
+                 const char *string)
+{
+    PyObject *value = PyUnicode_FromString(string);
+    if (value != NULL) {
+        _PyErr_SetObject(tstate, exception, value);
+        Py_DECREF(value);
+    }
+}
+
+void
+PyErr_SetString(PyObject *exception, const char *string)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_SetString(tstate, exception, string);
+}
+
+
+PyObject* _Py_HOT_FUNCTION
+PyErr_Occurred(void)
+{
+    /* The caller must hold the GIL. */
+    assert(PyGILState_Check());
+
+    PyThreadState *tstate = _PyThreadState_GET();
+    return _PyErr_Occurred(tstate);
+}
+
+
+int
+PyErr_GivenExceptionMatches(PyObject *err, PyObject *exc)
+{
+    if (err == NULL || exc == NULL) {
+        /* maybe caused by "import exceptions" that failed early on */
+        return 0;
+    }
+    if (PyTuple_Check(exc)) {
+        Py_ssize_t i, n;
+        n = PyTuple_Size(exc);
+        for (i = 0; i < n; i++) {
+            /* Test recursively */
+             if (PyErr_GivenExceptionMatches(
+                 err, PyTuple_GET_ITEM(exc, i)))
+             {
+                 return 1;
+             }
+        }
+        return 0;
+    }
+    /* err might be an instance, so check its class. */
+    if (PyExceptionInstance_Check(err))
+        err = PyExceptionInstance_Class(err);
+
+    if (PyExceptionClass_Check(err) && PyExceptionClass_Check(exc)) {
+        return PyType_IsSubtype((PyTypeObject *)err, (PyTypeObject *)exc);
+    }
+
+    return err == exc;
+}
+
+
+int
+_PyErr_ExceptionMatches(PyThreadState *tstate, PyObject *exc)
+{
+    return PyErr_GivenExceptionMatches(_PyErr_Occurred(tstate), exc);
+}
+
+
+int
+PyErr_ExceptionMatches(PyObject *exc)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    return _PyErr_ExceptionMatches(tstate, exc);
+}
+
+
+#ifndef Py_NORMALIZE_RECURSION_LIMIT
+#define Py_NORMALIZE_RECURSION_LIMIT 32
+#endif
+
+/* Used in many places to normalize a raised exception, including in
+   eval_code2(), do_raise(), and PyErr_Print()
+
+   XXX: should PyErr_NormalizeException() also call
+            PyException_SetTraceback() with the resulting value and tb?
+*/
+void
+_PyErr_NormalizeException(PyThreadState *tstate, PyObject **exc,
+                          PyObject **val, PyObject **tb)
+{
+    int recursion_depth = 0;
+    tstate->recursion_headroom++;
+    PyObject *type, *value, *initial_tb;
+
+  restart:
+    type = *exc;
+    if (type == NULL) {
+        /* There was no exception, so nothing to do. */
+        tstate->recursion_headroom--;
+        return;
+    }
+
+    value = *val;
+    /* If PyErr_SetNone() was used, the value will have been actually
+       set to NULL.
+    */
+    if (!value) {
+        value = Py_None;
+        Py_INCREF(value);
+    }
+
+    /* Normalize the exception so that if the type is a class, the
+       value will be an instance.
+    */
+    if (PyExceptionClass_Check(type)) {
+        PyObject *inclass = NULL;
+        int is_subclass = 0;
+
+        if (PyExceptionInstance_Check(value)) {
+            inclass = PyExceptionInstance_Class(value);
+            is_subclass = PyObject_IsSubclass(inclass, type);
+            if (is_subclass < 0) {
+                goto error;
+            }
+        }
+
+        /* If the value was not an instance, or is not an instance
+           whose class is (or is derived from) type, then use the
+           value as an argument to instantiation of the type
+           class.
+        */
+        if (!is_subclass) {
+            PyObject *fixed_value = _PyErr_CreateException(type, value);
+            if (fixed_value == NULL) {
+                goto error;
+            }
+            Py_DECREF(value);
+            value = fixed_value;
+        }
+        /* If the class of the instance doesn't exactly match the
+           class of the type, believe the instance.
+        */
+        else if (inclass != type) {
+            Py_INCREF(inclass);
+            Py_DECREF(type);
+            type = inclass;
+        }
+    }
+    *exc = type;
+    *val = value;
+    tstate->recursion_headroom--;
+    return;
+
+  error:
+    Py_DECREF(type);
+    Py_DECREF(value);
+    recursion_depth++;
+    if (recursion_depth == Py_NORMALIZE_RECURSION_LIMIT) {
+        _PyErr_SetString(tstate, PyExc_RecursionError,
+                         "maximum recursion depth exceeded "
+                         "while normalizing an exception");
+    }
+    /* If the new exception doesn't set a traceback and the old
+       exception had a traceback, use the old traceback for the
+       new exception.  It's better than nothing.
+    */
+    initial_tb = *tb;
+    _PyErr_Fetch(tstate, exc, val, tb);
+    assert(*exc != NULL);
+    if (initial_tb != NULL) {
+        if (*tb == NULL)
+            *tb = initial_tb;
+        else
+            Py_DECREF(initial_tb);
+    }
+    /* Abort when Py_NORMALIZE_RECURSION_LIMIT has been exceeded, and the
+       corresponding RecursionError could not be normalized, and the
+       MemoryError raised when normalize this RecursionError could not be
+       normalized. */
+    if (recursion_depth >= Py_NORMALIZE_RECURSION_LIMIT + 2) {
+        if (PyErr_GivenExceptionMatches(*exc, PyExc_MemoryError)) {
+            Py_FatalError("Cannot recover from MemoryErrors "
+                          "while normalizing exceptions.");
+        }
+        else {
+            Py_FatalError("Cannot recover from the recursive normalization "
+                          "of an exception.");
+        }
+    }
+    goto restart;
+}
+
+
+void
+PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_NormalizeException(tstate, exc, val, tb);
+}
+
+
+void
+_PyErr_Fetch(PyThreadState *tstate, PyObject **p_type, PyObject **p_value,
+             PyObject **p_traceback)
+{
+    *p_type = tstate->curexc_type;
+    *p_value = tstate->curexc_value;
+    *p_traceback = tstate->curexc_traceback;
+
+    tstate->curexc_type = NULL;
+    tstate->curexc_value = NULL;
+    tstate->curexc_traceback = NULL;
+}
+
+
+void
+PyErr_Fetch(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_Fetch(tstate, p_type, p_value, p_traceback);
+}
+
+
+void
+_PyErr_Clear(PyThreadState *tstate)
+{
+    _PyErr_Restore(tstate, NULL, NULL, NULL);
+}
+
+
+void
+PyErr_Clear(void)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_Clear(tstate);
+}
+
+static PyObject*
+get_exc_type(PyObject *exc_value)  /* returns a borrowed ref */
+{
+    if (exc_value == NULL || exc_value == Py_None) {
+        return Py_None;
+    }
+    else {
+        assert(PyExceptionInstance_Check(exc_value));
+        PyObject *type = PyExceptionInstance_Class(exc_value);
+        assert(type != NULL);
+        return type;
+    }
+}
+
+static PyObject*
+get_exc_traceback(PyObject *exc_value)  /* returns a borrowed ref */
+{
+    if (exc_value == NULL || exc_value == Py_None) {
+        return Py_None;
+    }
+    else {
+        assert(PyExceptionInstance_Check(exc_value));
+        PyObject *tb = PyException_GetTraceback(exc_value);
+        Py_XDECREF(tb);
+        return tb ? tb : Py_None;
+    }
+}
+
+void
+_PyErr_GetExcInfo(PyThreadState *tstate,
+                  PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
+{
+    _PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate);
+
+    *p_type = get_exc_type(exc_info->exc_value);
+    *p_value = exc_info->exc_value;
+    *p_traceback = get_exc_traceback(exc_info->exc_value);
+
+    Py_XINCREF(*p_type);
+    Py_XINCREF(*p_value);
+    Py_XINCREF(*p_traceback);
+}
+
+PyObject*
+_PyErr_GetHandledException(PyThreadState *tstate)
+{
+    _PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate);
+    PyObject *exc = exc_info->exc_value;
+    if (exc == NULL || exc == Py_None) {
+        return NULL;
+    }
+    return Py_NewRef(exc);
+}
+
+PyObject*
+PyErr_GetHandledException(void)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    return _PyErr_GetHandledException(tstate);
+}
+
+void
+_PyErr_SetHandledException(PyThreadState *tstate, PyObject *exc)
+{
+    Py_XSETREF(tstate->exc_info->exc_value, Py_XNewRef(exc));
+}
+
+void
+PyErr_SetHandledException(PyObject *exc)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_SetHandledException(tstate, exc);
+}
+
+void
+PyErr_GetExcInfo(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_GetExcInfo(tstate, p_type, p_value, p_traceback);
+}
+
+void
+PyErr_SetExcInfo(PyObject *type, PyObject *value, PyObject *traceback)
+{
+    PyErr_SetHandledException(value);
+    Py_XDECREF(value);
+    /* These args are no longer used, but we still need to steal a ref */
+    Py_XDECREF(type);
+    Py_XDECREF(traceback);
+}
+
+
+PyObject*
+_PyErr_StackItemToExcInfoTuple(_PyErr_StackItem *err_info)
+{
+    PyObject *exc_value = err_info->exc_value;
+
+    assert(exc_value == NULL ||
+           exc_value == Py_None ||
+           PyExceptionInstance_Check(exc_value));
+
+    PyObject *exc_type = get_exc_type(exc_value);
+    PyObject *exc_traceback = get_exc_traceback(exc_value);
+
+    return Py_BuildValue(
+        "(OOO)",
+        exc_type ? exc_type : Py_None,
+        exc_value ? exc_value : Py_None,
+        exc_traceback ? exc_traceback : Py_None);
+}
+
+
+/* Like PyErr_Restore(), but if an exception is already set,
+   set the context associated with it.
+
+   The caller is responsible for ensuring that this call won't create
+   any cycles in the exception context chain. */
+void
+_PyErr_ChainExceptions(PyObject *typ, PyObject *val, PyObject *tb)
+{
+    if (typ == NULL)
+        return;
+
+    PyThreadState *tstate = _PyThreadState_GET();
+
+    if (!PyExceptionClass_Check(typ)) {
+        _PyErr_Format(tstate, PyExc_SystemError,
+                      "_PyErr_ChainExceptions: "
+                      "exception %R is not a BaseException subclass",
+                      typ);
+        return;
+    }
+
+    if (_PyErr_Occurred(tstate)) {
+        PyObject *typ2, *val2, *tb2;
+        _PyErr_Fetch(tstate, &typ2, &val2, &tb2);
+        _PyErr_NormalizeException(tstate, &typ, &val, &tb);
+        if (tb != NULL) {
+            PyException_SetTraceback(val, tb);
+            Py_DECREF(tb);
+        }
+        Py_DECREF(typ);
+        _PyErr_NormalizeException(tstate, &typ2, &val2, &tb2);
+        PyException_SetContext(val2, val);
+        _PyErr_Restore(tstate, typ2, val2, tb2);
+    }
+    else {
+        _PyErr_Restore(tstate, typ, val, tb);
+    }
+}
+
+/* Set the currently set exception's context to the given exception.
+
+   If the provided exc_info is NULL, then the current Python thread state's
+   exc_info will be used for the context instead.
+
+   This function can only be called when _PyErr_Occurred() is true.
+   Also, this function won't create any cycles in the exception context
+   chain to the extent that _PyErr_SetObject ensures this. */
+void
+_PyErr_ChainStackItem(_PyErr_StackItem *exc_info)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    assert(_PyErr_Occurred(tstate));
+
+    int exc_info_given;
+    if (exc_info == NULL) {
+        exc_info_given = 0;
+        exc_info = tstate->exc_info;
+    } else {
+        exc_info_given = 1;
+    }
+
+    if (exc_info->exc_value == NULL || exc_info->exc_value == Py_None) {
+        return;
+    }
+
+    _PyErr_StackItem *saved_exc_info;
+    if (exc_info_given) {
+        /* Temporarily set the thread state's exc_info since this is what
+           _PyErr_SetObject uses for implicit exception chaining. */
+        saved_exc_info = tstate->exc_info;
+        tstate->exc_info = exc_info;
+    }
+
+    PyObject *typ, *val, *tb;
+    _PyErr_Fetch(tstate, &typ, &val, &tb);
+
+    /* _PyErr_SetObject sets the context from PyThreadState. */
+    _PyErr_SetObject(tstate, typ, val);
+    Py_DECREF(typ);  // since _PyErr_Occurred was true
+    Py_XDECREF(val);
+    Py_XDECREF(tb);
+
+    if (exc_info_given) {
+        tstate->exc_info = saved_exc_info;
+    }
+}
+
+static PyObject *
+_PyErr_FormatVFromCause(PyThreadState *tstate, PyObject *exception,
+                        const char *format, va_list vargs)
+{
+    PyObject *exc, *val, *val2, *tb;
+
+    assert(_PyErr_Occurred(tstate));
+    _PyErr_Fetch(tstate, &exc, &val, &tb);
+    _PyErr_NormalizeException(tstate, &exc, &val, &tb);
+    if (tb != NULL) {
+        PyException_SetTraceback(val, tb);
+        Py_DECREF(tb);
+    }
+    Py_DECREF(exc);
+    assert(!_PyErr_Occurred(tstate));
+
+    _PyErr_FormatV(tstate, exception, format, vargs);
+
+    _PyErr_Fetch(tstate, &exc, &val2, &tb);
+    _PyErr_NormalizeException(tstate, &exc, &val2, &tb);
+    Py_INCREF(val);
+    PyException_SetCause(val2, val);
+    PyException_SetContext(val2, val);
+    _PyErr_Restore(tstate, exc, val2, tb);
+
+    return NULL;
+}
+
+PyObject *
+_PyErr_FormatFromCauseTstate(PyThreadState *tstate, PyObject *exception,
+                             const char *format, ...)
+{
+    va_list vargs;
+#ifdef HAVE_STDARG_PROTOTYPES
+    va_start(vargs, format);
+#else
+    va_start(vargs);
+#endif
+    _PyErr_FormatVFromCause(tstate, exception, format, vargs);
+    va_end(vargs);
+    return NULL;
+}
+
+PyObject *
+_PyErr_FormatFromCause(PyObject *exception, const char *format, ...)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    va_list vargs;
+#ifdef HAVE_STDARG_PROTOTYPES
+    va_start(vargs, format);
+#else
+    va_start(vargs);
+#endif
+    _PyErr_FormatVFromCause(tstate, exception, format, vargs);
+    va_end(vargs);
+    return NULL;
+}
+
+/* Convenience functions to set a type error exception and return 0 */
+
+int
+PyErr_BadArgument(void)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_SetString(tstate, PyExc_TypeError,
+                     "bad argument type for built-in operation");
+    return 0;
+}
+
+PyObject *
+_PyErr_NoMemory(PyThreadState *tstate)
+{
+    if (Py_IS_TYPE(PyExc_MemoryError, NULL)) {
+        /* PyErr_NoMemory() has been called before PyExc_MemoryError has been
+           initialized by _PyExc_Init() */
+        Py_FatalError("Out of memory and PyExc_MemoryError is not "
+                      "initialized yet");
+    }
+    _PyErr_SetNone(tstate, PyExc_MemoryError);
+    return NULL;
+}
+
+PyObject *
+PyErr_NoMemory(void)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    return _PyErr_NoMemory(tstate);
+}
+
+PyObject *
+PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)
+{
+    return PyErr_SetFromErrnoWithFilenameObjects(exc, filenameObject, NULL);
+}
+
+PyObject *
+PyErr_SetFromErrnoWithFilenameObjects(PyObject *exc, PyObject *filenameObject, PyObject *filenameObject2)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    PyObject *message;
+    PyObject *v, *args;
+    int i = errno;
+#ifdef MS_WINDOWS
+    WCHAR *s_buf = NULL;
+#endif /* Unix/Windows */
+
+#ifdef EINTR
+    if (i == EINTR && PyErr_CheckSignals())
+        return NULL;
+#endif
+
+#ifndef MS_WINDOWS
+    if (i != 0) {
+        const char *s = strerror(i);
+        message = PyUnicode_DecodeLocale(s, "surrogateescape");
+    }
+    else {
+        /* Sometimes errno didn't get set */
+        message = PyUnicode_FromString("Error");
+    }
+#else
+    if (i == 0)
+        message = PyUnicode_FromString("Error"); /* Sometimes errno didn't get set */
+    else
+    {
+        /* Note that the Win32 errors do not lineup with the
+           errno error.  So if the error is in the MSVC error
+           table, we use it, otherwise we assume it really _is_
+           a Win32 error code
+        */
+        if (i > 0 && i < _sys_nerr) {
+            message = PyUnicode_FromString(_sys_errlist[i]);
+        }
+        else {
+            int len = FormatMessageW(
+                FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                FORMAT_MESSAGE_FROM_SYSTEM |
+                FORMAT_MESSAGE_IGNORE_INSERTS,
+                NULL,                   /* no message source */
+                i,
+                MAKELANGID(LANG_NEUTRAL,
+                           SUBLANG_DEFAULT),
+                           /* Default language */
+                (LPWSTR) &s_buf,
+                0,                      /* size not used */
+                NULL);                  /* no args */
+            if (len==0) {
+                /* Only ever seen this in out-of-mem
+                   situations */
+                s_buf = NULL;
+                message = PyUnicode_FromFormat("Windows Error 0x%x", i);
+            } else {
+                /* remove trailing cr/lf and dots */
+                while (len > 0 && (s_buf[len-1] <= L' ' || s_buf[len-1] == L'.'))
+                    s_buf[--len] = L'\0';
+                message = PyUnicode_FromWideChar(s_buf, len);
+            }
+        }
+    }
+#endif /* Unix/Windows */
+
+    if (message == NULL)
+    {
+#ifdef MS_WINDOWS
+        LocalFree(s_buf);
+#endif
+        return NULL;
+    }
+
+    if (filenameObject != NULL) {
+        if (filenameObject2 != NULL)
+            args = Py_BuildValue("(iOOiO)", i, message, filenameObject, 0, filenameObject2);
+        else
+            args = Py_BuildValue("(iOO)", i, message, filenameObject);
+    } else {
+        assert(filenameObject2 == NULL);
+        args = Py_BuildValue("(iO)", i, message);
+    }
+    Py_DECREF(message);
+
+    if (args != NULL) {
+        v = PyObject_Call(exc, args, NULL);
+        Py_DECREF(args);
+        if (v != NULL) {
+            _PyErr_SetObject(tstate, (PyObject *) Py_TYPE(v), v);
+            Py_DECREF(v);
+        }
+    }
+#ifdef MS_WINDOWS
+    LocalFree(s_buf);
+#endif
+    return NULL;
+}
+
+PyObject *
+PyErr_SetFromErrnoWithFilename(PyObject *exc, const char *filename)
+{
+    PyObject *name = NULL;
+    if (filename) {
+        int i = errno;
+        name = PyUnicode_DecodeFSDefault(filename);
+        if (name == NULL) {
+            return NULL;
+        }
+        errno = i;
+    }
+    PyObject *result = PyErr_SetFromErrnoWithFilenameObjects(exc, name, NULL);
+    Py_XDECREF(name);
+    return result;
+}
+
+PyObject *
+PyErr_SetFromErrno(PyObject *exc)
+{
+    return PyErr_SetFromErrnoWithFilenameObjects(exc, NULL, NULL);
+}
+
+#ifdef MS_WINDOWS
+/* Windows specific error code handling */
+PyObject *PyErr_SetExcFromWindowsErrWithFilenameObject(
+    PyObject *exc,
+    int ierr,
+    PyObject *filenameObject)
+{
+    return PyErr_SetExcFromWindowsErrWithFilenameObjects(exc, ierr,
+        filenameObject, NULL);
+}
+
+PyObject *PyErr_SetExcFromWindowsErrWithFilenameObjects(
+    PyObject *exc,
+    int ierr,
+    PyObject *filenameObject,
+    PyObject *filenameObject2)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    int len;
+    WCHAR *s_buf = NULL; /* Free via LocalFree */
+    PyObject *message;
+    PyObject *args, *v;
+
+    DWORD err = (DWORD)ierr;
+    if (err==0) {
+        err = GetLastError();
+    }
+
+    len = FormatMessageW(
+        /* Error API error */
+        FORMAT_MESSAGE_ALLOCATE_BUFFER |
+        FORMAT_MESSAGE_FROM_SYSTEM |
+        FORMAT_MESSAGE_IGNORE_INSERTS,
+        NULL,           /* no message source */
+        err,
+        MAKELANGID(LANG_NEUTRAL,
+        SUBLANG_DEFAULT), /* Default language */
+        (LPWSTR) &s_buf,
+        0,              /* size not used */
+        NULL);          /* no args */
+    if (len==0) {
+        /* Only seen this in out of mem situations */
+        message = PyUnicode_FromFormat("Windows Error 0x%x", err);
+        s_buf = NULL;
+    } else {
+        /* remove trailing cr/lf and dots */
+        while (len > 0 && (s_buf[len-1] <= L' ' || s_buf[len-1] == L'.'))
+            s_buf[--len] = L'\0';
+        message = PyUnicode_FromWideChar(s_buf, len);
+    }
+
+    if (message == NULL)
+    {
+        LocalFree(s_buf);
+        return NULL;
+    }
+
+    if (filenameObject == NULL) {
+        assert(filenameObject2 == NULL);
+        filenameObject = filenameObject2 = Py_None;
+    }
+    else if (filenameObject2 == NULL)
+        filenameObject2 = Py_None;
+    /* This is the constructor signature for OSError.
+       The POSIX translation will be figured out by the constructor. */
+    args = Py_BuildValue("(iOOiO)", 0, message, filenameObject, err, filenameObject2);
+    Py_DECREF(message);
+
+    if (args != NULL) {
+        v = PyObject_Call(exc, args, NULL);
+        Py_DECREF(args);
+        if (v != NULL) {
+            _PyErr_SetObject(tstate, (PyObject *) Py_TYPE(v), v);
+            Py_DECREF(v);
+        }
+    }
+    LocalFree(s_buf);
+    return NULL;
+}
+
+PyObject *PyErr_SetExcFromWindowsErrWithFilename(
+    PyObject *exc,
+    int ierr,
+    const char *filename)
+{
+    PyObject *name = NULL;
+    if (filename) {
+        if ((DWORD)ierr == 0) {
+            ierr = (int)GetLastError();
+        }
+        name = PyUnicode_DecodeFSDefault(filename);
+        if (name == NULL) {
+            return NULL;
+        }
+    }
+    PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObjects(exc,
+                                                                 ierr,
+                                                                 name,
+                                                                 NULL);
+    Py_XDECREF(name);
+    return ret;
+}
+
+PyObject *PyErr_SetExcFromWindowsErr(PyObject *exc, int ierr)
+{
+    return PyErr_SetExcFromWindowsErrWithFilename(exc, ierr, NULL);
+}
+
+PyObject *PyErr_SetFromWindowsErr(int ierr)
+{
+    return PyErr_SetExcFromWindowsErrWithFilename(PyExc_OSError,
+                                                  ierr, NULL);
+}
+
+PyObject *PyErr_SetFromWindowsErrWithFilename(
+    int ierr,
+    const char *filename)
+{
+    PyObject *name = NULL;
+    if (filename) {
+        if ((DWORD)ierr == 0) {
+            ierr = (int)GetLastError();
+        }
+        name = PyUnicode_DecodeFSDefault(filename);
+        if (name == NULL) {
+            return NULL;
+        }
+    }
+    PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObjects(
+                                                  PyExc_OSError,
+                                                  ierr, name, NULL);
+    Py_XDECREF(name);
+    return result;
+}
+
+#endif /* MS_WINDOWS */
+
+PyObject *
+PyErr_SetImportErrorSubclass(PyObject *exception, PyObject *msg,
+    PyObject *name, PyObject *path)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    int issubclass;
+    PyObject *kwargs, *error;
+
+    issubclass = PyObject_IsSubclass(exception, PyExc_ImportError);
+    if (issubclass < 0) {
+        return NULL;
+    }
+    else if (!issubclass) {
+        _PyErr_SetString(tstate, PyExc_TypeError,
+                         "expected a subclass of ImportError");
+        return NULL;
+    }
+
+    if (msg == NULL) {
+        _PyErr_SetString(tstate, PyExc_TypeError,
+                         "expected a message argument");
+        return NULL;
+    }
+
+    if (name == NULL) {
+        name = Py_None;
+    }
+    if (path == NULL) {
+        path = Py_None;
+    }
+
+    kwargs = PyDict_New();
+    if (kwargs == NULL) {
+        return NULL;
+    }
+    if (PyDict_SetItemString(kwargs, "name", name) < 0) {
+        goto done;
+    }
+    if (PyDict_SetItemString(kwargs, "path", path) < 0) {
+        goto done;
+    }
+
+    error = PyObject_VectorcallDict(exception, &msg, 1, kwargs);
+    if (error != NULL) {
+        _PyErr_SetObject(tstate, (PyObject *)Py_TYPE(error), error);
+        Py_DECREF(error);
+    }
+
+done:
+    Py_DECREF(kwargs);
+    return NULL;
+}
+
+PyObject *
+PyErr_SetImportError(PyObject *msg, PyObject *name, PyObject *path)
+{
+    return PyErr_SetImportErrorSubclass(PyExc_ImportError, msg, name, path);
+}
+
+void
+_PyErr_BadInternalCall(const char *filename, int lineno)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_Format(tstate, PyExc_SystemError,
+                  "%s:%d: bad argument to internal function",
+                  filename, lineno);
+}
+
+/* Remove the preprocessor macro for PyErr_BadInternalCall() so that we can
+   export the entry point for existing object code: */
+#undef PyErr_BadInternalCall
+void
+PyErr_BadInternalCall(void)
+{
+    assert(0 && "bad argument to internal function");
+    PyThreadState *tstate = _PyThreadState_GET();
+    _PyErr_SetString(tstate, PyExc_SystemError,
+                     "bad argument to internal function");
+}
+#define PyErr_BadInternalCall() _PyErr_BadInternalCall(__FILE__, __LINE__)
+
+
+static PyObject *
+_PyErr_FormatV(PyThreadState *tstate, PyObject *exception,
+               const char *format, va_list vargs)
+{
+    PyObject* string;
+
+    /* Issue #23571: PyUnicode_FromFormatV() must not be called with an
+       exception set, it calls arbitrary Python code like PyObject_Repr() */
+    _PyErr_Clear(tstate);
+
+    string = PyUnicode_FromFormatV(format, vargs);
+    if (string != NULL) {
+        _PyErr_SetObject(tstate, exception, string);
+        Py_DECREF(string);
+    }
+    return NULL;
+}
+
+
+PyObject *
+PyErr_FormatV(PyObject *exception, const char *format, va_list vargs)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    return _PyErr_FormatV(tstate, exception, format, vargs);
+}
+
+
+PyObject *
+_PyErr_Format(PyThreadState *tstate, PyObject *exception,
+              const char *format, ...)
+{
+    va_list vargs;
+#ifdef HAVE_STDARG_PROTOTYPES
+    va_start(vargs, format);
+#else
+    va_start(vargs);
+#endif
+    _PyErr_FormatV(tstate, exception, format, vargs);
+    va_end(vargs);
+    return NULL;
+}
+
+
+PyObject *
+PyErr_Format(PyObject *exception, const char *format, ...)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    va_list vargs;
+#ifdef HAVE_STDARG_PROTOTYPES
+    va_start(vargs, format);
+#else
+    va_start(vargs);
+#endif
+    _PyErr_FormatV(tstate, exception, format, vargs);
+    va_end(vargs);
+    return NULL;
+}
+
+
+PyObject *
+PyErr_NewException(const char *name, PyObject *base, PyObject *dict)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    PyObject *modulename = NULL;
+    PyObject *mydict = NULL;
+    PyObject *bases = NULL;
+    PyObject *result = NULL;
+
+    const char *dot = strrchr(name, '.');
+    if (dot == NULL) {
+        _PyErr_SetString(tstate, PyExc_SystemError,
+                         "PyErr_NewException: name must be module.class");
+        return NULL;
+    }
+    if (base == NULL) {
+        base = PyExc_Exception;
+    }
+    if (dict == NULL) {
+        dict = mydict = PyDict_New();
+        if (dict == NULL)
+            goto failure;
+    }
+
+    int r = PyDict_Contains(dict, &_Py_ID(__module__));
+    if (r < 0) {
+        goto failure;
+    }
+    if (r == 0) {
+        modulename = PyUnicode_FromStringAndSize(name,
+                                             (Py_ssize_t)(dot-name));
+        if (modulename == NULL)
+            goto failure;
+        if (PyDict_SetItem(dict, &_Py_ID(__module__), modulename) != 0)
+            goto failure;
+    }
+    if (PyTuple_Check(base)) {
+        bases = base;
+        /* INCREF as we create a new ref in the else branch */
+        Py_INCREF(bases);
+    } else {
+        bases = PyTuple_Pack(1, base);
+        if (bases == NULL)
+            goto failure;
+    }
+    /* Create a real class. */
+    result = PyObject_CallFunction((PyObject *)&PyType_Type, "sOO",
+                                   dot+1, bases, dict);
+  failure:
+    Py_XDECREF(bases);
+    Py_XDECREF(mydict);
+    Py_XDECREF(modulename);
+    return result;
+}
+
+
+/* Create an exception with docstring */
+PyObject *
+PyErr_NewExceptionWithDoc(const char *name, const char *doc,
+                          PyObject *base, PyObject *dict)
+{
+    int result;
+    PyObject *ret = NULL;
+    PyObject *mydict = NULL; /* points to the dict only if we create it */
+    PyObject *docobj;
+
+    if (dict == NULL) {
+        dict = mydict = PyDict_New();
+        if (dict == NULL) {
+            return NULL;
+        }
+    }
+
+    if (doc != NULL) {
+        docobj = PyUnicode_FromString(doc);
+        if (docobj == NULL)
+            goto failure;
+        result = PyDict_SetItemString(dict, "__doc__", docobj);
+        Py_DECREF(docobj);
+        if (result < 0)
+            goto failure;
+    }
+
+    ret = PyErr_NewException(name, base, dict);
+  failure:
+    Py_XDECREF(mydict);
+    return ret;
+}
+
+
+PyDoc_STRVAR(UnraisableHookArgs__doc__,
+"UnraisableHookArgs\n\
+\n\
+Type used to pass arguments to sys.unraisablehook.");
+
+static PyTypeObject UnraisableHookArgsType;
+
+static PyStructSequence_Field UnraisableHookArgs_fields[] = {
+    {"exc_type", "Exception type"},
+    {"exc_value", "Exception value"},
+    {"exc_traceback", "Exception traceback"},
+    {"err_msg", "Error message"},
+    {"object", "Object causing the exception"},
+    {0}
+};
+
+static PyStructSequence_Desc UnraisableHookArgs_desc = {
+    .name = "UnraisableHookArgs",
+    .doc = UnraisableHookArgs__doc__,
+    .fields = UnraisableHookArgs_fields,
+    .n_in_sequence = 5
+};
+
+
+PyStatus
+_PyErr_InitTypes(PyInterpreterState *interp)
+{
+    if (!_Py_IsMainInterpreter(interp)) {
+        return _PyStatus_OK();
+    }
+
+    if (UnraisableHookArgsType.tp_name == NULL) {
+        if (PyStructSequence_InitType2(&UnraisableHookArgsType,
+                                       &UnraisableHookArgs_desc) < 0) {
+            return _PyStatus_ERR("failed to initialize UnraisableHookArgs type");
+        }
+    }
+    return _PyStatus_OK();
+}
+
+
+void
+_PyErr_FiniTypes(PyInterpreterState *interp)
+{
+    if (!_Py_IsMainInterpreter(interp)) {
+        return;
+    }
+
+    _PyStructSequence_FiniType(&UnraisableHookArgsType);
+}
+
+
+static PyObject *
+make_unraisable_hook_args(PyThreadState *tstate, PyObject *exc_type,
+                          PyObject *exc_value, PyObject *exc_tb,
+                          PyObject *err_msg, PyObject *obj)
+{
+    PyObject *args = PyStructSequence_New(&UnraisableHookArgsType);
+    if (args == NULL) {
+        return NULL;
+    }
+
+    Py_ssize_t pos = 0;
+#define ADD_ITEM(exc_type) \
+        do { \
+            if (exc_type == NULL) { \
+                exc_type = Py_None; \
+            } \
+            Py_INCREF(exc_type); \
+            PyStructSequence_SET_ITEM(args, pos++, exc_type); \
+        } while (0)
+
+
+    ADD_ITEM(exc_type);
+    ADD_ITEM(exc_value);
+    ADD_ITEM(exc_tb);
+    ADD_ITEM(err_msg);
+    ADD_ITEM(obj);
+#undef ADD_ITEM
+
+    if (_PyErr_Occurred(tstate)) {
+        Py_DECREF(args);
+        return NULL;
+    }
+    return args;
+}
+
+
+
+/* Default implementation of sys.unraisablehook.
+
+   It can be called to log the exception of a custom sys.unraisablehook.
+
+   Do nothing if sys.stderr attribute doesn't exist or is set to None. */
+static int
+write_unraisable_exc_file(PyThreadState *tstate, PyObject *exc_type,
+                          PyObject *exc_value, PyObject *exc_tb,
+                          PyObject *err_msg, PyObject *obj, PyObject *file)
+{
+    if (obj != NULL && obj != Py_None) {
+        if (err_msg != NULL && err_msg != Py_None) {
+            if (PyFile_WriteObject(err_msg, file, Py_PRINT_RAW) < 0) {
+                return -1;
+            }
+            if (PyFile_WriteString(": ", file) < 0) {
+                return -1;
+            }
+        }
+        else {
+            if (PyFile_WriteString("Exception ignored in: ", file) < 0) {
+                return -1;
+            }
+        }
+
+        if (PyFile_WriteObject(obj, file, 0) < 0) {
+            _PyErr_Clear(tstate);
+            if (PyFile_WriteString("<object repr() failed>", file) < 0) {
+                return -1;
+            }
+        }
+        if (PyFile_WriteString("\n", file) < 0) {
+            return -1;
+        }
+    }
+    else if (err_msg != NULL && err_msg != Py_None) {
+        if (PyFile_WriteObject(err_msg, file, Py_PRINT_RAW) < 0) {
+            return -1;
+        }
+        if (PyFile_WriteString(":\n", file) < 0) {
+            return -1;
+        }
+    }
+
+    if (exc_tb != NULL && exc_tb != Py_None) {
+        if (PyTraceBack_Print(exc_tb, file) < 0) {
+            /* continue even if writing the traceback failed */
+            _PyErr_Clear(tstate);
+        }
+    }
+
+    if (exc_type == NULL || exc_type == Py_None) {
+        return -1;
+    }
+
+    assert(PyExceptionClass_Check(exc_type));
+
+    PyObject *modulename = PyObject_GetAttr(exc_type, &_Py_ID(__module__));
+    if (modulename == NULL || !PyUnicode_Check(modulename)) {
+        Py_XDECREF(modulename);
+        _PyErr_Clear(tstate);
+        if (PyFile_WriteString("<unknown>", file) < 0) {
+            return -1;
+        }
+    }
+    else {
+        if (!_PyUnicode_Equal(modulename, &_Py_ID(builtins)) &&
+            !_PyUnicode_Equal(modulename, &_Py_ID(__main__))) {
+            if (PyFile_WriteObject(modulename, file, Py_PRINT_RAW) < 0) {
+                Py_DECREF(modulename);
+                return -1;
+            }
+            Py_DECREF(modulename);
+            if (PyFile_WriteString(".", file) < 0) {
+                return -1;
+            }
+        }
+        else {
+            Py_DECREF(modulename);
+        }
+    }
+
+    PyObject *qualname = PyType_GetQualName((PyTypeObject *)exc_type);
+    if (qualname == NULL || !PyUnicode_Check(qualname)) {
+        Py_XDECREF(qualname);
+        _PyErr_Clear(tstate);
+        if (PyFile_WriteString("<unknown>", file) < 0) {
+            return -1;
+        }
+    }
+    else {
+        if (PyFile_WriteObject(qualname, file, Py_PRINT_RAW) < 0) {
+            Py_DECREF(qualname);
+            return -1;
+        }
+        Py_DECREF(qualname);
+    }
+
+    if (exc_value && exc_value != Py_None) {
+        if (PyFile_WriteString(": ", file) < 0) {
+            return -1;
+        }
+        if (PyFile_WriteObject(exc_value, file, Py_PRINT_RAW) < 0) {
+            _PyErr_Clear(tstate);
+            if (PyFile_WriteString("<exception str() failed>", file) < 0) {
+                return -1;
+            }
+        }
+    }
+
+    if (PyFile_WriteString("\n", file) < 0) {
+        return -1;
+    }
+
+    /* Explicitly call file.flush() */
+    PyObject *res = _PyObject_CallMethodNoArgs(file, &_Py_ID(flush));
+    if (!res) {
+        return -1;
+    }
+    Py_DECREF(res);
+
+    return 0;
+}
+
+
+static int
+write_unraisable_exc(PyThreadState *tstate, PyObject *exc_type,
+                     PyObject *exc_value, PyObject *exc_tb, PyObject *err_msg,
+                     PyObject *obj)
+{
+    PyObject *file = _PySys_GetAttr(tstate, &_Py_ID(stderr));
+    if (file == NULL || file == Py_None) {
+        return 0;
+    }
+
+    /* Hold a strong reference to ensure that sys.stderr doesn't go away
+       while we use it */
+    Py_INCREF(file);
+    int res = write_unraisable_exc_file(tstate, exc_type, exc_value, exc_tb,
+                                        err_msg, obj, file);
+    Py_DECREF(file);
+
+    return res;
+}
+
+
+PyObject*
+_PyErr_WriteUnraisableDefaultHook(PyObject *args)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+
+    if (!Py_IS_TYPE(args, &UnraisableHookArgsType)) {
+        _PyErr_SetString(tstate, PyExc_TypeError,
+                         "sys.unraisablehook argument type "
+                         "must be UnraisableHookArgs");
+        return NULL;
+    }
+
+    /* Borrowed references */
+    PyObject *exc_type = PyStructSequence_GET_ITEM(args, 0);
+    PyObject *exc_value = PyStructSequence_GET_ITEM(args, 1);
+    PyObject *exc_tb = PyStructSequence_GET_ITEM(args, 2);
+    PyObject *err_msg = PyStructSequence_GET_ITEM(args, 3);
+    PyObject *obj = PyStructSequence_GET_ITEM(args, 4);
+
+    if (write_unraisable_exc(tstate, exc_type, exc_value, exc_tb, err_msg, obj) < 0) {
+        return NULL;
+    }
+    Py_RETURN_NONE;
+}
+
+
+/* Call sys.unraisablehook().
+
+   This function can be used when an exception has occurred but there is no way
+   for Python to handle it. For example, when a destructor raises an exception
+   or during garbage collection (gc.collect()).
+
+   If err_msg_str is non-NULL, the error message is formatted as:
+   "Exception ignored %s" % err_msg_str. Otherwise, use "Exception ignored in"
+   error message.
+
+   An exception must be set when calling this function. */
+void
+_PyErr_WriteUnraisableMsg(const char *err_msg_str, PyObject *obj)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    _Py_EnsureTstateNotNULL(tstate);
+
+    PyObject *err_msg = NULL;
+    PyObject *exc_type, *exc_value, *exc_tb;
+    _PyErr_Fetch(tstate, &exc_type, &exc_value, &exc_tb);
+
+    assert(exc_type != NULL);
+
+    if (exc_type == NULL) {
+        /* sys.unraisablehook requires that at least exc_type is set */
+        goto default_hook;
+    }
+
+    if (exc_tb == NULL) {
+        PyFrameObject *frame = PyThreadState_GetFrame(tstate);
+        if (frame != NULL) {
+            exc_tb = _PyTraceBack_FromFrame(NULL, frame);
+            if (exc_tb == NULL) {
+                _PyErr_Clear(tstate);
+            }
+            Py_DECREF(frame);
+        }
+    }
+
+    _PyErr_NormalizeException(tstate, &exc_type, &exc_value, &exc_tb);
+
+    if (exc_tb != NULL && exc_tb != Py_None && PyTraceBack_Check(exc_tb)) {
+        if (PyException_SetTraceback(exc_value, exc_tb) < 0) {
+            _PyErr_Clear(tstate);
+        }
+    }
+
+    if (err_msg_str != NULL) {
+        err_msg = PyUnicode_FromFormat("Exception ignored %s", err_msg_str);
+        if (err_msg == NULL) {
+            PyErr_Clear();
+        }
+    }
+
+    PyObject *hook_args = make_unraisable_hook_args(
+        tstate, exc_type, exc_value, exc_tb, err_msg, obj);
+    if (hook_args == NULL) {
+        err_msg_str = ("Exception ignored on building "
+                       "sys.unraisablehook arguments");
+        goto error;
+    }
+
+    PyObject *hook = _PySys_GetAttr(tstate, &_Py_ID(unraisablehook));
+    if (hook == NULL) {
+        Py_DECREF(hook_args);
+        goto default_hook;
+    }
+
+    if (_PySys_Audit(tstate, "sys.unraisablehook", "OO", hook, hook_args) < 0) {
+        Py_DECREF(hook_args);
+        err_msg_str = "Exception ignored in audit hook";
+        obj = NULL;
+        goto error;
+    }
+
+    if (hook == Py_None) {
+        Py_DECREF(hook_args);
+        goto default_hook;
+    }
+
+    PyObject *res = PyObject_CallOneArg(hook, hook_args);
+    Py_DECREF(hook_args);
+    if (res != NULL) {
+        Py_DECREF(res);
+        goto done;
+    }
+
+    /* sys.unraisablehook failed: log its error using default hook */
+    obj = hook;
+    err_msg_str = NULL;
+
+error:
+    /* err_msg_str and obj have been updated and we have a new exception */
+    Py_XSETREF(err_msg, PyUnicode_FromString(err_msg_str ?
+        err_msg_str : "Exception ignored in sys.unraisablehook"));
+    Py_XDECREF(exc_type);
+    Py_XDECREF(exc_value);
+    Py_XDECREF(exc_tb);
+    _PyErr_Fetch(tstate, &exc_type, &exc_value, &exc_tb);
+
+default_hook:
+    /* Call the default unraisable hook (ignore failure) */
+    (void)write_unraisable_exc(tstate, exc_type, exc_value, exc_tb,
+                               err_msg, obj);
+
+done:
+    Py_XDECREF(exc_type);
+    Py_XDECREF(exc_value);
+    Py_XDECREF(exc_tb);
+    Py_XDECREF(err_msg);
+    _PyErr_Clear(tstate); /* Just in case */
+}
+
+
+void
+PyErr_WriteUnraisable(PyObject *obj)
+{
+    _PyErr_WriteUnraisableMsg(NULL, obj);
+}
+
+
+void
+PyErr_SyntaxLocation(const char *filename, int lineno)
+{
+    PyErr_SyntaxLocationEx(filename, lineno, -1);
+}
+
+
+/* Set file and line information for the current exception.
+   If the exception is not a SyntaxError, also sets additional attributes
+   to make printing of exceptions believe it is a syntax error. */
+
+static void
+PyErr_SyntaxLocationObjectEx(PyObject *filename, int lineno, int col_offset,
+                             int end_lineno, int end_col_offset)
+{
+    PyObject *exc, *v, *tb, *tmp;
+    PyThreadState *tstate = _PyThreadState_GET();
+
+    /* add attributes for the line number and filename for the error */
+    _PyErr_Fetch(tstate, &exc, &v, &tb);
+    _PyErr_NormalizeException(tstate, &exc, &v, &tb);
+    /* XXX check that it is, indeed, a syntax error. It might not
+     * be, though. */
+    tmp = PyLong_FromLong(lineno);
+    if (tmp == NULL)
+        _PyErr_Clear(tstate);
+    else {
+        if (PyObject_SetAttr(v, &_Py_ID(lineno), tmp)) {
+            _PyErr_Clear(tstate);
+        }
+        Py_DECREF(tmp);
+    }
+    tmp = NULL;
+    if (col_offset >= 0) {
+        tmp = PyLong_FromLong(col_offset);
+        if (tmp == NULL) {
+            _PyErr_Clear(tstate);
+        }
+    }
+    if (PyObject_SetAttr(v, &_Py_ID(offset), tmp ? tmp : Py_None)) {
+        _PyErr_Clear(tstate);
+    }
+    Py_XDECREF(tmp);
+
+    tmp = NULL;
+    if (end_lineno >= 0) {
+        tmp = PyLong_FromLong(end_lineno);
+        if (tmp == NULL) {
+            _PyErr_Clear(tstate);
+        }
+    }
+    if (PyObject_SetAttr(v, &_Py_ID(end_lineno), tmp ? tmp : Py_None)) {
+        _PyErr_Clear(tstate);
+    }
+    Py_XDECREF(tmp);
+
+    tmp = NULL;
+    if (end_col_offset >= 0) {
+        tmp = PyLong_FromLong(end_col_offset);
+        if (tmp == NULL) {
+            _PyErr_Clear(tstate);
+        }
+    }
+    if (PyObject_SetAttr(v, &_Py_ID(end_offset), tmp ? tmp : Py_None)) {
+        _PyErr_Clear(tstate);
+    }
+    Py_XDECREF(tmp);
+
+    tmp = NULL;
+    if (filename != NULL) {
+        if (PyObject_SetAttr(v, &_Py_ID(filename), filename)) {
+            _PyErr_Clear(tstate);
+        }
+
+        tmp = PyErr_ProgramTextObject(filename, lineno);
+        if (tmp) {
+            if (PyObject_SetAttr(v, &_Py_ID(text), tmp)) {
+                _PyErr_Clear(tstate);
+            }
+            Py_DECREF(tmp);
+        }
+        else {
+            _PyErr_Clear(tstate);
+        }
+    }
+    if (exc != PyExc_SyntaxError) {
+        if (_PyObject_LookupAttr(v, &_Py_ID(msg), &tmp) < 0) {
+            _PyErr_Clear(tstate);
+        }
+        else if (tmp) {
+            Py_DECREF(tmp);
+        }
+        else {
+            tmp = PyObject_Str(v);
+            if (tmp) {
+                if (PyObject_SetAttr(v, &_Py_ID(msg), tmp)) {
+                    _PyErr_Clear(tstate);
+                }
+                Py_DECREF(tmp);
+            }
+            else {
+                _PyErr_Clear(tstate);
+            }
+        }
+
+        if (_PyObject_LookupAttr(v, &_Py_ID(print_file_and_line), &tmp) < 0) {
+            _PyErr_Clear(tstate);
+        }
+        else if (tmp) {
+            Py_DECREF(tmp);
+        }
+        else {
+            if (PyObject_SetAttr(v, &_Py_ID(print_file_and_line), Py_None)) {
+                _PyErr_Clear(tstate);
+            }
+        }
+    }
+    _PyErr_Restore(tstate, exc, v, tb);
+}
+
+void
+PyErr_SyntaxLocationObject(PyObject *filename, int lineno, int col_offset) {
+    PyErr_SyntaxLocationObjectEx(filename, lineno, col_offset, lineno, -1);
+}
+
+void
+PyErr_RangedSyntaxLocationObject(PyObject *filename, int lineno, int col_offset,
+                                 int end_lineno, int end_col_offset) {
+    PyErr_SyntaxLocationObjectEx(filename, lineno, col_offset, end_lineno, end_col_offset);
+}
+
+void
+PyErr_SyntaxLocationEx(const char *filename, int lineno, int col_offset)
+{
+    PyThreadState *tstate = _PyThreadState_GET();
+    PyObject *fileobj;
+    if (filename != NULL) {
+        fileobj = PyUnicode_DecodeFSDefault(filename);
+        if (fileobj == NULL) {
+            _PyErr_Clear(tstate);
+        }
+    }
+    else {
+        fileobj = NULL;
+    }
+    PyErr_SyntaxLocationObject(fileobj, lineno, col_offset);
+    Py_XDECREF(fileobj);
+}
+
+/* Attempt to load the line of text that the exception refers to.  If it
+   fails, it will return NULL but will not set an exception.
+
+   XXX The functionality of this function is quite similar to the
+   functionality in tb_displayline() in traceback.c. */
+
+static PyObject *
+err_programtext(PyThreadState *tstate, FILE *fp, int lineno, const char* encoding)
+{
+    int i;
+    char linebuf[1000];
+    if (fp == NULL) {
+        return NULL;
+    }
+
+    for (i = 0; i < lineno; i++) {
+        char *pLastChar = &linebuf[sizeof(linebuf) - 2];
+        do {
+            *pLastChar = '\0';
+            if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf,
+                                         fp, NULL) == NULL) {
+                goto after_loop;
+            }
+            /* fgets read *something*; if it didn't get as
+               far as pLastChar, it must have found a newline
+               or hit the end of the file; if pLastChar is \n,
+               it obviously found a newline; else we haven't
+               yet seen a newline, so must continue */
+        } while (*pLastChar != '\0' && *pLastChar != '\n');
+    }
+
+after_loop:
+    fclose(fp);
+    if (i == lineno) {
+        PyObject *res;
+        if (encoding != NULL) {
+            res = PyUnicode_Decode(linebuf, strlen(linebuf), encoding, "replace");
+        } else {
+            res = PyUnicode_FromString(linebuf);
+        }
+        if (res == NULL)
+            _PyErr_Clear(tstate);
+        return res;
+    }
+    return NULL;
+}
+
+PyObject *
+PyErr_ProgramText(const char *filename, int lineno)
+{
+    if (filename == NULL) {
+        return NULL;
+    }
+
+    PyObject *filename_obj = PyUnicode_DecodeFSDefault(filename);
+    if (filename_obj == NULL) {
+        PyErr_Clear();
+        return NULL;
+    }
+    PyObject *res = PyErr_ProgramTextObject(filename_obj, lineno);
+    Py_DECREF(filename_obj);
+    return res;
+}
+
+PyObject *
+_PyErr_ProgramDecodedTextObject(PyObject *filename, int lineno, const char* encoding)
+{
+    if (filename == NULL || lineno <= 0) {
+        return NULL;
+    }
+
+    PyThreadState *tstate = _PyThreadState_GET();
+    FILE *fp = _Py_fopen_obj(filename, "r" PY_STDIOTEXTMODE);
+    if (fp == NULL) {
+        _PyErr_Clear(tstate);
+        return NULL;
+    }
+    return err_programtext(tstate, fp, lineno, encoding);
+}
+
+PyObject *
+PyErr_ProgramTextObject(PyObject *filename, int lineno)
+{
+    return _PyErr_ProgramDecodedTextObject(filename, lineno, NULL);
+}
+
+#ifdef __cplusplus
+}
+#endif