/* Call when an exception has occurred but there is no way for Python
to handle it. Examples: exception in __del__ or during GC. */
void
PyErr_WriteUnraisable(PyObject *obj)
{
_Py_IDENTIFIER(__module__);
PyObject *f, *t, *v, *tb;
PyObject *moduleName = NULL;
char* className;
PyErr_Fetch(&t, &v, &tb);
f = _PySys_GetObjectId(&PyId_stderr);
if (f == NULL || f == Py_None)
goto done;
if (obj) {
if (PyFile_WriteString("Exception ignored in: ", f) < 0)
goto done;
if (PyFile_WriteObject(obj, f, 0) < 0) {
PyErr_Clear();
if (PyFile_WriteString("<object repr() failed>", f) < 0) {
goto done;
}
}
if (PyFile_WriteString("\n", f) < 0)
goto done;
}
if (PyTraceBack_Print(tb, f) < 0)
goto done;
if (!t)
goto done;
assert(PyExceptionClass_Check(t));
className = PyExceptionClass_Name(t);
if (className != NULL) {
char *dot = strrchr(className, '.');
if (dot != NULL)
className = dot+1;
}
moduleName = _PyObject_GetAttrId(t, &PyId___module__);
if (moduleName == NULL) {
PyErr_Clear();
if (PyFile_WriteString("<unknown>", f) < 0)
goto done;
}
else {
if (!_PyUnicode_EqualToASCIIId(moduleName, &PyId_builtins)) {
if (PyFile_WriteObject(moduleName, f, Py_PRINT_RAW) < 0)
goto done;
if (PyFile_WriteString(".", f) < 0)
goto done;
}
}
if (className == NULL) {
if (PyFile_WriteString("<unknown>", f) < 0)
goto done;
}
else {
if (PyFile_WriteString(className, f) < 0)
goto done;
}
if (v && v != Py_None) {
if (PyFile_WriteString(": ", f) < 0)
goto done;
if (PyFile_WriteObject(v, f, Py_PRINT_RAW) < 0) {
PyErr_Clear();
if (PyFile_WriteString("<exception str() failed>", f) < 0) {
goto done;
}
}
}
if (PyFile_WriteString("\n", f) < 0)
goto done;
done:
Py_XDECREF(moduleName);
Py_XDECREF(t);
Py_XDECREF(v);
Py_XDECREF(tb);
PyErr_Clear(); /* Just in case */
}
static void
print_exception(PyObject *f, PyObject *value)
{
int err = 0;
PyObject *type, *tb;
_Py_IDENTIFIER(print_file_and_line);
if (!PyExceptionInstance_Check(value)) {
err = PyFile_WriteString("TypeError: print_exception(): Exception expected for value, ", f);
err += PyFile_WriteString(Py_TYPE(value)->tp_name, f);
err += PyFile_WriteString(" found\n", f);
if (err)
PyErr_Clear();
return;
}
Py_INCREF(value);
fflush(stdout);
type = (PyObject *) Py_TYPE(value);
tb = PyException_GetTraceback(value);
if (tb && tb != Py_None)
err = PyTraceBack_Print(tb, f);
if (err == 0 &&
_PyObject_HasAttrId(value, &PyId_print_file_and_line))
{
PyObject *message, *filename, *text;
int lineno, offset;
if (!parse_syntax_error(value, &message, &filename,
&lineno, &offset, &text))
PyErr_Clear();
else {
PyObject *line;
Py_DECREF(value);
value = message;
line = PyUnicode_FromFormat(" File \"%U\", line %d\n",
filename, lineno);
Py_DECREF(filename);
if (line != NULL) {
PyFile_WriteObject(line, f, Py_PRINT_RAW);
Py_DECREF(line);
}
if (text != NULL) {
print_error_text(f, offset, text);
Py_DECREF(text);
}
/* Can't be bothered to check all those
PyFile_WriteString() calls */
if (PyErr_Occurred())
err = -1;
}
}
if (err) {
/* Don't do anything else */
}
else {
PyObject* moduleName;
const char *className;
_Py_IDENTIFIER(__module__);
assert(PyExceptionClass_Check(type));
className = PyExceptionClass_Name(type);
if (className != NULL) {
const char *dot = strrchr(className, '.');
if (dot != NULL)
className = dot+1;
}
moduleName = _PyObject_GetAttrId(type, &PyId___module__);
if (moduleName == NULL || !PyUnicode_Check(moduleName))
{
Py_XDECREF(moduleName);
err = PyFile_WriteString("<unknown>", f);
}
else {
if (!_PyUnicode_EqualToASCIIId(moduleName, &PyId_builtins))
{
err = PyFile_WriteObject(moduleName, f, Py_PRINT_RAW);
err += PyFile_WriteString(".", f);
}
Py_DECREF(moduleName);
}
if (err == 0) {
if (className == NULL)
err = PyFile_WriteString("<unknown>", f);
else
err = PyFile_WriteString(className, f);
}
}
if (err == 0 && (value != Py_None)) {
PyObject *s = PyObject_Str(value);
/* only print colon if the str() of the
object is not the empty string
*/
if (s == NULL) {
PyErr_Clear();
err = -1;
PyFile_WriteString(": <exception str() failed>", f);
}
else if (!PyUnicode_Check(s) ||
PyUnicode_GetLength(s) != 0)
err = PyFile_WriteString(": ", f);
if (err == 0)
err = PyFile_WriteObject(s, f, Py_PRINT_RAW);
Py_XDECREF(s);
}
/* try to write a newline in any case */
if (err < 0) {
PyErr_Clear();
}
err += PyFile_WriteString("\n", f);
Py_XDECREF(tb);
Py_DECREF(value);
/* If an error happened here, don't show it.
XXX This is wrong, but too many callers rely on this behavior. */
if (err != 0)
PyErr_Clear();
}
