/* Error handling */ #include "Python.h" #include "pycore_audit.h" // _PySys_Audit() #include "pycore_call.h" // _PyObject_CallNoArgs() #include "pycore_fileutils.h" // _PyFile_Flush #include "pycore_initconfig.h" // _PyStatus_ERR() #include "pycore_pyerrors.h" // _PyErr_Format() #include "pycore_pystate.h" // _PyThreadState_GET() #include "pycore_runtime.h" // _Py_ID() #include "pycore_structseq.h" // _PyStructSequence_FiniBuiltin() #include "pycore_traceback.h" // _PyTraceBack_FromFrame() #include "pycore_unicodeobject.h" // _PyUnicode_Equal() #include "../Parser/tokenizer/tokenizer.h" #ifdef MS_WINDOWS # include # include # include // _sys_nerr #endif void _PyErr_SetRaisedException(PyThreadState *tstate, PyObject *exc) { PyObject *old_exc = tstate->current_exception; tstate->current_exception = exc; Py_XDECREF(old_exc); } 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_Restore(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *traceback) { if (type == NULL) { assert(value == NULL); assert(traceback == NULL); _PyErr_SetRaisedException(tstate, NULL); return; } assert(PyExceptionClass_Check(type)); if (value != NULL && type == (PyObject *)Py_TYPE(value)) { /* Already normalized */ #ifdef Py_DEBUG PyObject *tb = PyException_GetTraceback(value); assert(tb != Py_None); Py_XDECREF(tb); #endif } else { PyObject *exc = _PyErr_CreateException(type, value); Py_XDECREF(value); if (exc == NULL) { Py_DECREF(type); Py_XDECREF(traceback); return; } value = exc; } assert(PyExceptionInstance_Check(value)); if (traceback != NULL) { if (PyException_SetTraceback(value, traceback) < 0) { Py_DECREF(traceback); Py_DECREF(value); Py_DECREF(type); return; } Py_DECREF(traceback); } _PyErr_SetRaisedException(tstate, value); Py_DECREF(type); } void PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback) { PyThreadState *tstate = _PyThreadState_GET(); _PyErr_Restore(tstate, type, value, traceback); } void PyErr_SetRaisedException(PyObject *exc) { PyThreadState *tstate = _PyThreadState_GET(); _PyErr_SetRaisedException(tstate, exc); } _PyErr_StackItem * _PyErr_GetTopmostException(PyThreadState *tstate) { _PyErr_StackItem *exc_info = tstate->exc_info; assert(exc_info); while (exc_info->exc_value == NULL && exc_info->previous_item != NULL) { exc_info = exc_info->previous_item; } assert(!Py_IsNone(exc_info->exc_value)); return exc_info; } static PyObject * get_normalization_failure_note(PyThreadState *tstate, PyObject *exception, PyObject *value) { PyObject *args = PyObject_Repr(value); if (args == NULL) { _PyErr_Clear(tstate); args = PyUnicode_FromFormat(""); } PyObject *note; const char *tpname = ((PyTypeObject*)exception)->tp_name; if (args == NULL) { _PyErr_Clear(tstate); note = PyUnicode_FromFormat("Normalization failed: type=%s", tpname); } else { note = PyUnicode_FromFormat("Normalization failed: type=%s args=%S", tpname, args); Py_DECREF(args); } return note; } 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; } /* Normalize the exception */ int is_subclass = 0; if (value != NULL && PyExceptionInstance_Check(value)) { is_subclass = PyObject_IsSubclass((PyObject *)Py_TYPE(value), exception); if (is_subclass < 0) { return; } } Py_XINCREF(value); if (!is_subclass) { /* We must normalize the value right now */ /* Issue #23571: functions must not be called with an exception set */ _PyErr_Clear(tstate); PyObject *fixed_value = _PyErr_CreateException(exception, value); if (fixed_value == NULL) { PyObject *exc = _PyErr_GetRaisedException(tstate); assert(PyExceptionInstance_Check(exc)); PyObject *note = get_normalization_failure_note(tstate, exception, value); Py_XDECREF(value); if (note != NULL) { /* ignore errors in _PyException_AddNote - they will be overwritten below */ _PyException_AddNote(exc, note); Py_DECREF(note); } _PyErr_SetRaisedException(tstate, exc); return; } Py_XSETREF(value, fixed_value); } exc_value = _PyErr_GetTopmostException(tstate)->exc_value; if (exc_value != NULL && exc_value != Py_None) { /* Implicit exception chaining */ Py_INCREF(exc_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); } } assert(value != NULL); if (PyExceptionInstance_Check(value)) tb = PyException_GetTraceback(value); _PyErr_Restore(tstate, Py_NewRef(Py_TYPE(value)), 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. This function should be used to * raise a KeyError with an argument instead of PyErr_SetObject(PyExc_KeyError, * arg) which has a special behavior. PyErr_SetObject() unpacks arg if it's a * tuple, and it uses arg instead of creating a new exception if arg is an * exception. * * If an exception is already set, override the exception. */ void _PyErr_SetKeyError(PyObject *arg) { PyThreadState *tstate = _PyThreadState_GET(); // PyObject_CallOneArg() must not be called with an exception set, // otherwise _Py_CheckFunctionResult() can fail if the function returned // a result with an excception set. _PyErr_Clear(tstate); PyObject *exc = PyObject_CallOneArg(PyExc_KeyError, arg); if (!exc) { /* caller will expect error to be set anyway */ return; } _PyErr_SetObject(tstate, (PyObject*)Py_TYPE(exc), exc); Py_DECREF(exc); } 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); } void _PyErr_SetLocaleString(PyObject *exception, const char *string) { PyObject *value = PyUnicode_DecodeLocale(string, "surrogateescape"); if (value != NULL) { PyErr_SetObject(exception, value); Py_DECREF(value); } } PyObject* _Py_HOT_FUNCTION PyErr_Occurred(void) { /* The caller must hold a thread state. */ _Py_AssertHoldsTstate(); 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_NewRef(Py_None); } /* 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_SETREF(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_SETREF(type, Py_NewRef(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); } PyObject * _PyErr_GetRaisedException(PyThreadState *tstate) { PyObject *exc = tstate->current_exception; tstate->current_exception = NULL; return exc; } PyObject * PyErr_GetRaisedException(void) { PyThreadState *tstate = _PyThreadState_GET(); return _PyErr_GetRaisedException(tstate); } void _PyErr_Fetch(PyThreadState *tstate, PyObject **p_type, PyObject **p_value, PyObject **p_traceback) { PyObject *exc = _PyErr_GetRaisedException(tstate); *p_value = exc; if (exc == NULL) { *p_type = NULL; *p_traceback = NULL; } else { *p_type = Py_NewRef(Py_TYPE(exc)); *p_traceback = PyException_GetTraceback(exc); } } 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 strong 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 Py_NewRef(type); } } static PyObject* get_exc_traceback(PyObject *exc_value) /* returns a strong ref */ { if (exc_value == NULL || exc_value == Py_None) { return Py_None; } else { assert(PyExceptionInstance_Check(exc_value)); PyObject *tb = PyException_GetTraceback(exc_value); 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 = Py_XNewRef(exc_info->exc_value); *p_traceback = get_exc_traceback(exc_info->exc_value); } 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 == Py_None ? NULL : 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 *ret = PyTuple_New(3); if (ret == NULL) { return NULL; } PyObject *exc_type = get_exc_type(exc_value); PyObject *exc_traceback = get_exc_traceback(exc_value); PyTuple_SET_ITEM(ret, 0, exc_type ? exc_type : Py_None); PyTuple_SET_ITEM(ret, 1, exc_value ? Py_NewRef(exc_value) : Py_None); PyTuple_SET_ITEM(ret, 2, exc_traceback ? exc_traceback : Py_None); return ret; } /* 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)) { _PyErr_NormalizeException(tstate, &typ, &val, &tb); if (tb != NULL) { PyException_SetTraceback(val, tb); Py_DECREF(tb); } Py_DECREF(typ); PyObject *exc2 = _PyErr_GetRaisedException(tstate); PyException_SetContext(exc2, val); _PyErr_SetRaisedException(tstate, exc2); } else { _PyErr_Restore(tstate, typ, val, tb); } } /* Like PyErr_SetRaisedException(), 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_ChainExceptions1Tstate(PyThreadState *tstate, PyObject *exc) { if (exc == NULL) { return; } if (_PyErr_Occurred(tstate)) { PyObject *exc2 = _PyErr_GetRaisedException(tstate); PyException_SetContext(exc2, exc); _PyErr_SetRaisedException(tstate, exc2); } else { _PyErr_SetRaisedException(tstate, exc); } } void _PyErr_ChainExceptions1(PyObject *exc) { PyThreadState *tstate = _PyThreadState_GET(); _PyErr_ChainExceptions1Tstate(tstate, exc); } /* If the current thread is handling an exception (exc_info is ), set this exception as the context of the current raised exception. 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(void) { PyThreadState *tstate = _PyThreadState_GET(); assert(_PyErr_Occurred(tstate)); _PyErr_StackItem *exc_info = tstate->exc_info; if (exc_info->exc_value == NULL || exc_info->exc_value == Py_None) { return; } PyObject *exc = _PyErr_GetRaisedException(tstate); /* _PyErr_SetObject sets the context from PyThreadState. */ _PyErr_SetObject(tstate, (PyObject *) Py_TYPE(exc), exc); Py_DECREF(exc); // since _PyErr_Occurred was true } static PyObject * _PyErr_FormatVFromCause(PyThreadState *tstate, PyObject *exception, const char *format, va_list vargs) { assert(_PyErr_Occurred(tstate)); PyObject *exc = _PyErr_GetRaisedException(tstate); assert(!_PyErr_Occurred(tstate)); _PyErr_FormatV(tstate, exception, format, vargs); PyObject *exc2 = _PyErr_GetRaisedException(tstate); PyException_SetCause(exc2, Py_NewRef(exc)); PyException_SetContext(exc2, Py_NewRef(exc)); Py_DECREF(exc); _PyErr_SetRaisedException(tstate, exc2); return NULL; } PyObject * _PyErr_FormatFromCauseTstate(PyThreadState *tstate, PyObject *exception, const char *format, ...) { va_list vargs; va_start(vargs, format); _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; va_start(vargs, format); _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(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 */ static PyObject * new_importerror( PyThreadState *tstate, PyObject *exctype, PyObject *msg, PyObject *name, PyObject *path, PyObject* from_name) { PyObject *exc = NULL; PyObject *kwargs = NULL; int issubclass = PyObject_IsSubclass(exctype, 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; } if (from_name == NULL) { from_name = Py_None; } kwargs = PyDict_New(); if (kwargs == NULL) { return NULL; } if (PyDict_SetItemString(kwargs, "name", name) < 0) { goto finally; } if (PyDict_SetItemString(kwargs, "path", path) < 0) { goto finally; } if (PyDict_SetItemString(kwargs, "name_from", from_name) < 0) { goto finally; } exc = PyObject_VectorcallDict(exctype, &msg, 1, kwargs); finally: Py_DECREF(kwargs); return exc; } static PyObject * _PyErr_SetImportErrorSubclassWithNameFrom( PyObject *exception, PyObject *msg, PyObject *name, PyObject *path, PyObject* from_name) { PyThreadState *tstate = _PyThreadState_GET(); PyObject *error = new_importerror( tstate, exception, msg, name, path, from_name); if (error != NULL) { _PyErr_SetObject(tstate, (PyObject *)Py_TYPE(error), error); Py_DECREF(error); } return NULL; } PyObject * PyErr_SetImportErrorSubclass(PyObject *exception, PyObject *msg, PyObject *name, PyObject *path) { return _PyErr_SetImportErrorSubclassWithNameFrom(exception, msg, name, path, NULL); } PyObject * _PyErr_SetImportErrorWithNameFrom(PyObject *msg, PyObject *name, PyObject *path, PyObject* from_name) { return _PyErr_SetImportErrorSubclassWithNameFrom(PyExc_ImportError, msg, name, path, from_name); } PyObject * PyErr_SetImportError(PyObject *msg, PyObject *name, PyObject *path) { return PyErr_SetImportErrorSubclass(PyExc_ImportError, msg, name, path); } int _PyErr_SetModuleNotFoundError(PyObject *name) { PyThreadState *tstate = _PyThreadState_GET(); if (name == NULL) { _PyErr_SetString(tstate, PyExc_TypeError, "expected a name argument"); return -1; } PyObject *msg = PyUnicode_FromFormat("%S module not found", name); if (msg == NULL) { return -1; } PyObject *exctype = PyExc_ModuleNotFoundError; PyObject *exc = new_importerror(tstate, exctype, msg, name, NULL, NULL); Py_DECREF(msg); if (exc == NULL) { return -1; } _PyErr_SetObject(tstate, exctype, exc); Py_DECREF(exc); return 0; } 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__) 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; va_start(vargs, format); _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; va_start(vargs, format); _PyErr_FormatV(tstate, exception, format, vargs); va_end(vargs); return NULL; } /* Adds a note to the current exception (if any) */ void _PyErr_FormatNote(const char *format, ...) { PyObject *exc = PyErr_GetRaisedException(); if (exc == NULL) { return; } va_list vargs; va_start(vargs, format); PyObject *note = PyUnicode_FromFormatV(format, vargs); va_end(vargs); if (note == NULL) { goto error; } int res = _PyException_AddNote(exc, note); Py_DECREF(note); if (res < 0) { goto error; } PyErr_SetRaisedException(exc); return; error: _PyErr_ChainExceptions1(exc); } 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 = Py_NewRef(base); } 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 (_PyStructSequence_InitBuiltin(interp, &UnraisableHookArgsType, &UnraisableHookArgs_desc) < 0) { return _PyStatus_ERR("failed to initialize UnraisableHookArgs type"); } return _PyStatus_OK(); } void _PyErr_FiniTypes(PyInterpreterState *interp) { _PyStructSequence_FiniBuiltin(interp, &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; \ } \ PyStructSequence_SET_ITEM(args, pos++, Py_NewRef(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. This assumes 'file' is neither NULL nor 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) { assert(file != NULL); assert(!Py_IsNone(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("