mirror of
https://github.com/python/cpython
synced 2024-10-05 06:28:00 +00:00
ef9d9b6312
Add new sys.unraisablehook() function which can be overridden to control how "unraisable exceptions" are handled. It is called 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()). Changes: * Add an internal UnraisableHookArgs type used to pass arguments to sys.unraisablehook. * Add _PyErr_WriteUnraisableDefaultHook(). * The default hook now ignores exception on writing the traceback. * test_sys now uses unittest.main() to automatically discover tests: remove test_main(). * Add _PyErr_Init(). * Fix PyErr_WriteUnraisable(): hold a strong reference to sys.stderr while using it
1375 lines
37 KiB
C
1375 lines
37 KiB
C
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/* Error handling */
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#include "Python.h"
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#include "pycore_coreconfig.h"
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#include "pycore_pystate.h"
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#ifndef __STDC__
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#ifndef MS_WINDOWS
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extern char *strerror(int);
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#endif
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#endif
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#ifdef MS_WINDOWS
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#include <windows.h>
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#include <winbase.h>
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#endif
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#include <ctype.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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_Py_IDENTIFIER(builtins);
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_Py_IDENTIFIER(stderr);
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void
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PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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PyObject *oldtype, *oldvalue, *oldtraceback;
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if (traceback != NULL && !PyTraceBack_Check(traceback)) {
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/* XXX Should never happen -- fatal error instead? */
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/* Well, it could be None. */
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Py_DECREF(traceback);
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traceback = NULL;
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}
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/* Save these in locals to safeguard against recursive
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invocation through Py_XDECREF */
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oldtype = tstate->curexc_type;
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oldvalue = tstate->curexc_value;
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oldtraceback = tstate->curexc_traceback;
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tstate->curexc_type = type;
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tstate->curexc_value = value;
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tstate->curexc_traceback = traceback;
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Py_XDECREF(oldtype);
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Py_XDECREF(oldvalue);
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Py_XDECREF(oldtraceback);
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}
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_PyErr_StackItem *
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_PyErr_GetTopmostException(PyThreadState *tstate)
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{
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_PyErr_StackItem *exc_info = tstate->exc_info;
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while ((exc_info->exc_type == NULL || exc_info->exc_type == Py_None) &&
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exc_info->previous_item != NULL)
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{
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exc_info = exc_info->previous_item;
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}
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return exc_info;
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}
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static PyObject*
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_PyErr_CreateException(PyObject *exception, PyObject *value)
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{
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if (value == NULL || value == Py_None) {
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return _PyObject_CallNoArg(exception);
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}
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else if (PyTuple_Check(value)) {
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return PyObject_Call(exception, value, NULL);
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}
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else {
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return PyObject_CallFunctionObjArgs(exception, value, NULL);
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}
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}
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void
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PyErr_SetObject(PyObject *exception, PyObject *value)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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PyObject *exc_value;
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PyObject *tb = NULL;
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if (exception != NULL &&
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!PyExceptionClass_Check(exception)) {
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PyErr_Format(PyExc_SystemError,
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"exception %R not a BaseException subclass",
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exception);
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return;
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}
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Py_XINCREF(value);
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exc_value = _PyErr_GetTopmostException(tstate)->exc_value;
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if (exc_value != NULL && exc_value != Py_None) {
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/* Implicit exception chaining */
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Py_INCREF(exc_value);
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if (value == NULL || !PyExceptionInstance_Check(value)) {
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/* We must normalize the value right now */
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PyObject *fixed_value;
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/* Issue #23571: functions must not be called with an
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exception set */
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PyErr_Clear();
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fixed_value = _PyErr_CreateException(exception, value);
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Py_XDECREF(value);
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if (fixed_value == NULL) {
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Py_DECREF(exc_value);
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return;
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}
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value = fixed_value;
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}
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/* Avoid reference cycles through the context chain.
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This is O(chain length) but context chains are
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usually very short. Sensitive readers may try
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to inline the call to PyException_GetContext. */
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if (exc_value != value) {
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PyObject *o = exc_value, *context;
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while ((context = PyException_GetContext(o))) {
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Py_DECREF(context);
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if (context == value) {
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PyException_SetContext(o, NULL);
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break;
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}
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o = context;
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}
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PyException_SetContext(value, exc_value);
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}
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else {
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Py_DECREF(exc_value);
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}
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}
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if (value != NULL && PyExceptionInstance_Check(value))
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tb = PyException_GetTraceback(value);
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Py_XINCREF(exception);
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PyErr_Restore(exception, value, tb);
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}
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/* Set a key error with the specified argument, wrapping it in a
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* tuple automatically so that tuple keys are not unpacked as the
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* exception arguments. */
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void
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_PyErr_SetKeyError(PyObject *arg)
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{
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PyObject *tup;
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tup = PyTuple_Pack(1, arg);
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if (!tup)
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return; /* caller will expect error to be set anyway */
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PyErr_SetObject(PyExc_KeyError, tup);
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Py_DECREF(tup);
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}
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void
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PyErr_SetNone(PyObject *exception)
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{
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PyErr_SetObject(exception, (PyObject *)NULL);
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}
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void
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PyErr_SetString(PyObject *exception, const char *string)
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{
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PyObject *value = PyUnicode_FromString(string);
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PyErr_SetObject(exception, value);
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Py_XDECREF(value);
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}
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PyObject* _Py_HOT_FUNCTION
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PyErr_Occurred(void)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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return tstate == NULL ? NULL : tstate->curexc_type;
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}
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int
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PyErr_GivenExceptionMatches(PyObject *err, PyObject *exc)
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{
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if (err == NULL || exc == NULL) {
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/* maybe caused by "import exceptions" that failed early on */
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return 0;
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}
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if (PyTuple_Check(exc)) {
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Py_ssize_t i, n;
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n = PyTuple_Size(exc);
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for (i = 0; i < n; i++) {
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/* Test recursively */
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if (PyErr_GivenExceptionMatches(
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err, PyTuple_GET_ITEM(exc, i)))
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{
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return 1;
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}
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}
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return 0;
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}
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/* err might be an instance, so check its class. */
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if (PyExceptionInstance_Check(err))
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err = PyExceptionInstance_Class(err);
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if (PyExceptionClass_Check(err) && PyExceptionClass_Check(exc)) {
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return PyType_IsSubtype((PyTypeObject *)err, (PyTypeObject *)exc);
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}
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return err == exc;
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}
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int
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PyErr_ExceptionMatches(PyObject *exc)
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{
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return PyErr_GivenExceptionMatches(PyErr_Occurred(), exc);
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}
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#ifndef Py_NORMALIZE_RECURSION_LIMIT
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#define Py_NORMALIZE_RECURSION_LIMIT 32
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#endif
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/* Used in many places to normalize a raised exception, including in
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eval_code2(), do_raise(), and PyErr_Print()
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XXX: should PyErr_NormalizeException() also call
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PyException_SetTraceback() with the resulting value and tb?
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*/
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void
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PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
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{
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int recursion_depth = 0;
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PyObject *type, *value, *initial_tb;
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restart:
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type = *exc;
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if (type == NULL) {
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/* There was no exception, so nothing to do. */
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return;
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}
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value = *val;
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/* If PyErr_SetNone() was used, the value will have been actually
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set to NULL.
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*/
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if (!value) {
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value = Py_None;
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Py_INCREF(value);
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}
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/* Normalize the exception so that if the type is a class, the
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value will be an instance.
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*/
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if (PyExceptionClass_Check(type)) {
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PyObject *inclass = NULL;
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int is_subclass = 0;
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if (PyExceptionInstance_Check(value)) {
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inclass = PyExceptionInstance_Class(value);
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is_subclass = PyObject_IsSubclass(inclass, type);
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if (is_subclass < 0) {
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goto error;
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}
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}
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/* If the value was not an instance, or is not an instance
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whose class is (or is derived from) type, then use the
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value as an argument to instantiation of the type
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class.
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*/
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if (!is_subclass) {
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PyObject *fixed_value = _PyErr_CreateException(type, value);
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if (fixed_value == NULL) {
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goto error;
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}
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Py_DECREF(value);
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value = fixed_value;
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}
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/* If the class of the instance doesn't exactly match the
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class of the type, believe the instance.
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*/
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else if (inclass != type) {
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Py_INCREF(inclass);
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Py_DECREF(type);
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type = inclass;
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}
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}
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*exc = type;
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*val = value;
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return;
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error:
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Py_DECREF(type);
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Py_DECREF(value);
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recursion_depth++;
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if (recursion_depth == Py_NORMALIZE_RECURSION_LIMIT) {
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PyErr_SetString(PyExc_RecursionError, "maximum recursion depth "
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"exceeded while normalizing an exception");
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}
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/* If the new exception doesn't set a traceback and the old
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exception had a traceback, use the old traceback for the
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new exception. It's better than nothing.
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*/
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initial_tb = *tb;
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PyErr_Fetch(exc, val, tb);
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assert(*exc != NULL);
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if (initial_tb != NULL) {
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if (*tb == NULL)
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*tb = initial_tb;
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else
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Py_DECREF(initial_tb);
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}
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/* Abort when Py_NORMALIZE_RECURSION_LIMIT has been exceeded, and the
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corresponding RecursionError could not be normalized, and the
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MemoryError raised when normalize this RecursionError could not be
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normalized. */
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if (recursion_depth >= Py_NORMALIZE_RECURSION_LIMIT + 2) {
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if (PyErr_GivenExceptionMatches(*exc, PyExc_MemoryError)) {
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Py_FatalError("Cannot recover from MemoryErrors "
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"while normalizing exceptions.");
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}
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else {
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Py_FatalError("Cannot recover from the recursive normalization "
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"of an exception.");
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}
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}
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goto restart;
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}
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void
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PyErr_Fetch(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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*p_type = tstate->curexc_type;
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*p_value = tstate->curexc_value;
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*p_traceback = tstate->curexc_traceback;
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tstate->curexc_type = NULL;
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tstate->curexc_value = NULL;
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tstate->curexc_traceback = NULL;
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}
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void
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PyErr_Clear(void)
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{
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PyErr_Restore(NULL, NULL, NULL);
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}
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void
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PyErr_GetExcInfo(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
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{
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PyThreadState *tstate = _PyThreadState_GET();
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_PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate);
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*p_type = exc_info->exc_type;
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*p_value = exc_info->exc_value;
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*p_traceback = exc_info->exc_traceback;
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Py_XINCREF(*p_type);
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Py_XINCREF(*p_value);
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Py_XINCREF(*p_traceback);
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}
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void
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PyErr_SetExcInfo(PyObject *p_type, PyObject *p_value, PyObject *p_traceback)
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{
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PyObject *oldtype, *oldvalue, *oldtraceback;
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PyThreadState *tstate = _PyThreadState_GET();
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oldtype = tstate->exc_info->exc_type;
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oldvalue = tstate->exc_info->exc_value;
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oldtraceback = tstate->exc_info->exc_traceback;
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tstate->exc_info->exc_type = p_type;
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tstate->exc_info->exc_value = p_value;
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tstate->exc_info->exc_traceback = p_traceback;
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Py_XDECREF(oldtype);
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Py_XDECREF(oldvalue);
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Py_XDECREF(oldtraceback);
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}
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/* Like PyErr_Restore(), but if an exception is already set,
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set the context associated with it.
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*/
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void
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_PyErr_ChainExceptions(PyObject *exc, PyObject *val, PyObject *tb)
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{
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if (exc == NULL)
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return;
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if (PyErr_Occurred()) {
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PyObject *exc2, *val2, *tb2;
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PyErr_Fetch(&exc2, &val2, &tb2);
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PyErr_NormalizeException(&exc, &val, &tb);
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if (tb != NULL) {
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PyException_SetTraceback(val, tb);
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Py_DECREF(tb);
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}
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Py_DECREF(exc);
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PyErr_NormalizeException(&exc2, &val2, &tb2);
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PyException_SetContext(val2, val);
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PyErr_Restore(exc2, val2, tb2);
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}
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else {
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PyErr_Restore(exc, val, tb);
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}
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}
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static PyObject *
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_PyErr_FormatVFromCause(PyObject *exception, const char *format, va_list vargs)
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{
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PyObject *exc, *val, *val2, *tb;
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assert(PyErr_Occurred());
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PyErr_Fetch(&exc, &val, &tb);
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PyErr_NormalizeException(&exc, &val, &tb);
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if (tb != NULL) {
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PyException_SetTraceback(val, tb);
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Py_DECREF(tb);
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}
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Py_DECREF(exc);
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assert(!PyErr_Occurred());
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PyErr_FormatV(exception, format, vargs);
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PyErr_Fetch(&exc, &val2, &tb);
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PyErr_NormalizeException(&exc, &val2, &tb);
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Py_INCREF(val);
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PyException_SetCause(val2, val);
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PyException_SetContext(val2, val);
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PyErr_Restore(exc, val2, tb);
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return NULL;
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}
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PyObject *
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_PyErr_FormatFromCause(PyObject *exception, const char *format, ...)
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{
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va_list vargs;
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#ifdef HAVE_STDARG_PROTOTYPES
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va_start(vargs, format);
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#else
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va_start(vargs);
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#endif
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_PyErr_FormatVFromCause(exception, format, vargs);
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va_end(vargs);
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return NULL;
|
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}
|
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|
|
/* Convenience functions to set a type error exception and return 0 */
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|
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int
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PyErr_BadArgument(void)
|
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{
|
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PyErr_SetString(PyExc_TypeError,
|
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"bad argument type for built-in operation");
|
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return 0;
|
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}
|
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|
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PyObject *
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PyErr_NoMemory(void)
|
|
{
|
|
if (Py_TYPE(PyExc_MemoryError) == NULL) {
|
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/* PyErr_NoMemory() has been called before PyExc_MemoryError has been
|
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initialized by _PyExc_Init() */
|
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Py_FatalError("Out of memory and PyExc_MemoryError is not "
|
|
"initialized yet");
|
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}
|
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PyErr_SetNone(PyExc_MemoryError);
|
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return NULL;
|
|
}
|
|
|
|
PyObject *
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PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)
|
|
{
|
|
return PyErr_SetFromErrnoWithFilenameObjects(exc, filenameObject, NULL);
|
|
}
|
|
|
|
PyObject *
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PyErr_SetFromErrnoWithFilenameObjects(PyObject *exc, PyObject *filenameObject, PyObject *filenameObject2)
|
|
{
|
|
PyObject *message;
|
|
PyObject *v, *args;
|
|
int i = errno;
|
|
#ifdef MS_WINDOWS
|
|
WCHAR *s_buf = NULL;
|
|
#endif /* Unix/Windows */
|
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|
|
#ifdef EINTR
|
|
if (i == EINTR && PyErr_CheckSignals())
|
|
return NULL;
|
|
#endif
|
|
|
|
#ifndef MS_WINDOWS
|
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if (i != 0) {
|
|
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((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 = filename ? PyUnicode_DecodeFSDefault(filename) : NULL;
|
|
PyObject *result = PyErr_SetFromErrnoWithFilenameObjects(exc, name, NULL);
|
|
Py_XDECREF(name);
|
|
return result;
|
|
}
|
|
|
|
#ifdef MS_WINDOWS
|
|
PyObject *
|
|
PyErr_SetFromErrnoWithUnicodeFilename(PyObject *exc, const Py_UNICODE *filename)
|
|
{
|
|
PyObject *name = filename ? PyUnicode_FromWideChar(filename, -1) : NULL;
|
|
PyObject *result = PyErr_SetFromErrnoWithFilenameObjects(exc, name, NULL);
|
|
Py_XDECREF(name);
|
|
return result;
|
|
}
|
|
#endif /* MS_WINDOWS */
|
|
|
|
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)
|
|
{
|
|
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((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 = filename ? PyUnicode_DecodeFSDefault(filename) : NULL;
|
|
PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObjects(exc,
|
|
ierr,
|
|
name,
|
|
NULL);
|
|
Py_XDECREF(name);
|
|
return ret;
|
|
}
|
|
|
|
PyObject *PyErr_SetExcFromWindowsErrWithUnicodeFilename(
|
|
PyObject *exc,
|
|
int ierr,
|
|
const Py_UNICODE *filename)
|
|
{
|
|
PyObject *name = filename ? PyUnicode_FromWideChar(filename, -1) : 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 = filename ? PyUnicode_DecodeFSDefault(filename) : NULL;
|
|
PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObjects(
|
|
PyExc_OSError,
|
|
ierr, name, NULL);
|
|
Py_XDECREF(name);
|
|
return result;
|
|
}
|
|
|
|
PyObject *PyErr_SetFromWindowsErrWithUnicodeFilename(
|
|
int ierr,
|
|
const Py_UNICODE *filename)
|
|
{
|
|
PyObject *name = filename ? PyUnicode_FromWideChar(filename, -1) : 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)
|
|
{
|
|
int issubclass;
|
|
PyObject *kwargs, *error;
|
|
|
|
issubclass = PyObject_IsSubclass(exception, PyExc_ImportError);
|
|
if (issubclass < 0) {
|
|
return NULL;
|
|
}
|
|
else if (!issubclass) {
|
|
PyErr_SetString(PyExc_TypeError, "expected a subclass of ImportError");
|
|
return NULL;
|
|
}
|
|
|
|
if (msg == NULL) {
|
|
PyErr_SetString(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_FastCallDict(exception, &msg, 1, kwargs);
|
|
if (error != NULL) {
|
|
PyErr_SetObject((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)
|
|
{
|
|
PyErr_Format(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");
|
|
PyErr_Format(PyExc_SystemError,
|
|
"bad argument to internal function");
|
|
}
|
|
#define PyErr_BadInternalCall() _PyErr_BadInternalCall(__FILE__, __LINE__)
|
|
|
|
|
|
PyObject *
|
|
PyErr_FormatV(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();
|
|
|
|
string = PyUnicode_FromFormatV(format, vargs);
|
|
|
|
PyErr_SetObject(exception, string);
|
|
Py_XDECREF(string);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
PyObject *
|
|
PyErr_Format(PyObject *exception, const char *format, ...)
|
|
{
|
|
va_list vargs;
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
va_start(vargs, format);
|
|
#else
|
|
va_start(vargs);
|
|
#endif
|
|
PyErr_FormatV(exception, format, vargs);
|
|
va_end(vargs);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
PyObject *
|
|
PyErr_NewException(const char *name, PyObject *base, PyObject *dict)
|
|
{
|
|
_Py_IDENTIFIER(__module__);
|
|
const char *dot;
|
|
PyObject *modulename = NULL;
|
|
PyObject *classname = NULL;
|
|
PyObject *mydict = NULL;
|
|
PyObject *bases = NULL;
|
|
PyObject *result = NULL;
|
|
dot = strrchr(name, '.');
|
|
if (dot == NULL) {
|
|
PyErr_SetString(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;
|
|
}
|
|
if (_PyDict_GetItemIdWithError(dict, &PyId___module__) == NULL) {
|
|
if (PyErr_Occurred()) {
|
|
goto failure;
|
|
}
|
|
modulename = PyUnicode_FromStringAndSize(name,
|
|
(Py_ssize_t)(dot-name));
|
|
if (modulename == NULL)
|
|
goto failure;
|
|
if (_PyDict_SetItemId(dict, &PyId___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(classname);
|
|
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"},
|
|
{"object", "Object causing the exception"},
|
|
{0}
|
|
};
|
|
|
|
static PyStructSequence_Desc UnraisableHookArgs_desc = {
|
|
.name = "UnraisableHookArgs",
|
|
.doc = UnraisableHookArgs__doc__,
|
|
.fields = UnraisableHookArgs_fields,
|
|
.n_in_sequence = 4
|
|
};
|
|
|
|
|
|
_PyInitError
|
|
_PyErr_Init(void)
|
|
{
|
|
if (UnraisableHookArgsType.tp_name == NULL) {
|
|
if (PyStructSequence_InitType2(&UnraisableHookArgsType,
|
|
&UnraisableHookArgs_desc) < 0) {
|
|
return _Py_INIT_ERR("failed to initialize UnraisableHookArgs type");
|
|
}
|
|
}
|
|
return _Py_INIT_OK();
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
make_unraisable_hook_args(PyObject *exc_type, PyObject *exc_value,
|
|
PyObject *exc_tb, 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(obj);
|
|
#undef ADD_ITEM
|
|
|
|
if (PyErr_Occurred()) {
|
|
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(PyObject *exc_type, PyObject *exc_value,
|
|
PyObject *exc_tb, PyObject *obj, PyObject *file)
|
|
{
|
|
if (obj != NULL && obj != Py_None) {
|
|
if (PyFile_WriteString("Exception ignored in: ", file) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (PyFile_WriteObject(obj, file, 0) < 0) {
|
|
PyErr_Clear();
|
|
if (PyFile_WriteString("<object repr() failed>", file) < 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();
|
|
}
|
|
}
|
|
|
|
if (!exc_type) {
|
|
return -1;
|
|
}
|
|
|
|
assert(PyExceptionClass_Check(exc_type));
|
|
const char *className = PyExceptionClass_Name(exc_type);
|
|
if (className != NULL) {
|
|
const char *dot = strrchr(className, '.');
|
|
if (dot != NULL)
|
|
className = dot+1;
|
|
}
|
|
|
|
_Py_IDENTIFIER(__module__);
|
|
PyObject *moduleName = _PyObject_GetAttrId(exc_type, &PyId___module__);
|
|
if (moduleName == NULL || !PyUnicode_Check(moduleName)) {
|
|
Py_XDECREF(moduleName);
|
|
PyErr_Clear();
|
|
if (PyFile_WriteString("<unknown>", file) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
else {
|
|
if (!_PyUnicode_EqualToASCIIId(moduleName, &PyId_builtins)) {
|
|
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);
|
|
}
|
|
}
|
|
if (className == NULL) {
|
|
if (PyFile_WriteString("<unknown>", file) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
else {
|
|
if (PyFile_WriteString(className, file) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
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();
|
|
if (PyFile_WriteString("<exception str() failed>", file) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
if (PyFile_WriteString("\n", file) < 0) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
write_unraisable_exc(PyObject *exc_type, PyObject *exc_value,
|
|
PyObject *exc_tb, PyObject *obj)
|
|
{
|
|
PyObject *file = _PySys_GetObjectId(&PyId_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(exc_type, exc_value, exc_tb,
|
|
obj, file);
|
|
Py_DECREF(file);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
PyObject*
|
|
_PyErr_WriteUnraisableDefaultHook(PyObject *args)
|
|
{
|
|
if (Py_TYPE(args) != &UnraisableHookArgsType) {
|
|
PyErr_SetString(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 *obj = PyStructSequence_GET_ITEM(args, 3);
|
|
|
|
if (write_unraisable_exc(exc_type, exc_value, exc_tb, 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()).
|
|
|
|
An exception must be set when calling this function. */
|
|
void
|
|
PyErr_WriteUnraisable(PyObject *obj)
|
|
{
|
|
PyObject *exc_type, *exc_value, *exc_tb;
|
|
|
|
PyErr_Fetch(&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;
|
|
}
|
|
|
|
_Py_IDENTIFIER(unraisablehook);
|
|
PyObject *hook = _PySys_GetObjectId(&PyId_unraisablehook);
|
|
if (hook != NULL && hook != Py_None) {
|
|
PyObject *hook_args;
|
|
|
|
hook_args = make_unraisable_hook_args(exc_type, exc_value, exc_tb, obj);
|
|
if (hook_args != NULL) {
|
|
PyObject *args[1] = {hook_args};
|
|
PyObject *res = _PyObject_FastCall(hook, args, 1);
|
|
Py_DECREF(hook_args);
|
|
if (res != NULL) {
|
|
Py_DECREF(res);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* sys.unraisablehook failed: log its error using default hook */
|
|
Py_XDECREF(exc_type);
|
|
Py_XDECREF(exc_value);
|
|
Py_XDECREF(exc_tb);
|
|
PyErr_Fetch(&exc_type, &exc_value, &exc_tb);
|
|
|
|
obj = hook;
|
|
}
|
|
|
|
default_hook:
|
|
/* Call the default unraisable hook (ignore failure) */
|
|
(void)write_unraisable_exc(exc_type, exc_value, exc_tb, obj);
|
|
|
|
done:
|
|
Py_XDECREF(exc_type);
|
|
Py_XDECREF(exc_value);
|
|
Py_XDECREF(exc_tb);
|
|
PyErr_Clear(); /* Just in case */
|
|
}
|
|
|
|
extern PyObject *PyModule_GetWarningsModule(void);
|
|
|
|
|
|
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. */
|
|
|
|
void
|
|
PyErr_SyntaxLocationObject(PyObject *filename, int lineno, int col_offset)
|
|
{
|
|
PyObject *exc, *v, *tb, *tmp;
|
|
_Py_IDENTIFIER(filename);
|
|
_Py_IDENTIFIER(lineno);
|
|
_Py_IDENTIFIER(msg);
|
|
_Py_IDENTIFIER(offset);
|
|
_Py_IDENTIFIER(print_file_and_line);
|
|
_Py_IDENTIFIER(text);
|
|
|
|
/* add attributes for the line number and filename for the error */
|
|
PyErr_Fetch(&exc, &v, &tb);
|
|
PyErr_NormalizeException(&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();
|
|
else {
|
|
if (_PyObject_SetAttrId(v, &PyId_lineno, tmp))
|
|
PyErr_Clear();
|
|
Py_DECREF(tmp);
|
|
}
|
|
tmp = NULL;
|
|
if (col_offset >= 0) {
|
|
tmp = PyLong_FromLong(col_offset);
|
|
if (tmp == NULL)
|
|
PyErr_Clear();
|
|
}
|
|
if (_PyObject_SetAttrId(v, &PyId_offset, tmp ? tmp : Py_None))
|
|
PyErr_Clear();
|
|
Py_XDECREF(tmp);
|
|
if (filename != NULL) {
|
|
if (_PyObject_SetAttrId(v, &PyId_filename, filename))
|
|
PyErr_Clear();
|
|
|
|
tmp = PyErr_ProgramTextObject(filename, lineno);
|
|
if (tmp) {
|
|
if (_PyObject_SetAttrId(v, &PyId_text, tmp))
|
|
PyErr_Clear();
|
|
Py_DECREF(tmp);
|
|
}
|
|
}
|
|
if (exc != PyExc_SyntaxError) {
|
|
if (!_PyObject_HasAttrId(v, &PyId_msg)) {
|
|
tmp = PyObject_Str(v);
|
|
if (tmp) {
|
|
if (_PyObject_SetAttrId(v, &PyId_msg, tmp))
|
|
PyErr_Clear();
|
|
Py_DECREF(tmp);
|
|
} else {
|
|
PyErr_Clear();
|
|
}
|
|
}
|
|
if (!_PyObject_HasAttrId(v, &PyId_print_file_and_line)) {
|
|
if (_PyObject_SetAttrId(v, &PyId_print_file_and_line,
|
|
Py_None))
|
|
PyErr_Clear();
|
|
}
|
|
}
|
|
PyErr_Restore(exc, v, tb);
|
|
}
|
|
|
|
void
|
|
PyErr_SyntaxLocationEx(const char *filename, int lineno, int col_offset)
|
|
{
|
|
PyObject *fileobj;
|
|
if (filename != NULL) {
|
|
fileobj = PyUnicode_DecodeFSDefault(filename);
|
|
if (fileobj == NULL)
|
|
PyErr_Clear();
|
|
}
|
|
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(FILE *fp, int lineno)
|
|
{
|
|
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)
|
|
break;
|
|
/* 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');
|
|
}
|
|
fclose(fp);
|
|
if (i == lineno) {
|
|
PyObject *res;
|
|
res = PyUnicode_FromString(linebuf);
|
|
if (res == NULL)
|
|
PyErr_Clear();
|
|
return res;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *
|
|
PyErr_ProgramText(const char *filename, int lineno)
|
|
{
|
|
FILE *fp;
|
|
if (filename == NULL || *filename == '\0' || lineno <= 0)
|
|
return NULL;
|
|
fp = _Py_fopen(filename, "r" PY_STDIOTEXTMODE);
|
|
return err_programtext(fp, lineno);
|
|
}
|
|
|
|
PyObject *
|
|
PyErr_ProgramTextObject(PyObject *filename, int lineno)
|
|
{
|
|
FILE *fp;
|
|
if (filename == NULL || lineno <= 0)
|
|
return NULL;
|
|
fp = _Py_fopen_obj(filename, "r" PY_STDIOTEXTMODE);
|
|
if (fp == NULL) {
|
|
PyErr_Clear();
|
|
return NULL;
|
|
}
|
|
return err_programtext(fp, lineno);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|