79     _PyErr_StackItem *exc_info = tstate->exc_info;  in _PyErr_GetTopmostException()  local
80     while ((exc_info->exc_type == NULL || exc_info->exc_type == Py_None) &&  in _PyErr_GetTopmostException()
81            exc_info->previous_item != NULL)  in _PyErr_GetTopmostException()
83         exc_info = exc_info->previous_item;  in _PyErr_GetTopmostException()
85     return exc_info;  in _PyErr_GetTopmostException()
471     _PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate);  in _PyErr_GetExcInfo()  local
472     *p_type = exc_info->exc_type;  in _PyErr_GetExcInfo()
473     *p_value = exc_info->exc_value;  in _PyErr_GetExcInfo()
474     *p_traceback = exc_info->exc_traceback;  in _PyErr_GetExcInfo()
495     oldtype = tstate->exc_info->exc_type;  in PyErr_SetExcInfo()
496     oldvalue = tstate->exc_info->exc_value;  in PyErr_SetExcInfo()
497     oldtraceback = tstate->exc_info->exc_traceback;  in PyErr_SetExcInfo()
499     tstate->exc_info->exc_type = p_type;  in PyErr_SetExcInfo()
500     tstate->exc_info->exc_value = p_value;  in PyErr_SetExcInfo()
501     tstate->exc_info->exc_traceback = p_traceback;  in PyErr_SetExcInfo()
556 _PyErr_ChainStackItem(_PyErr_StackItem *exc_info)  in _PyErr_ChainStackItem()  argument
562     if (exc_info == NULL) {  in _PyErr_ChainStackItem()
564         exc_info = tstate->exc_info;  in _PyErr_ChainStackItem()
568     if (exc_info->exc_type == NULL || exc_info->exc_type == Py_None) {  in _PyErr_ChainStackItem()
576         saved_exc_info = tstate->exc_info;  in _PyErr_ChainStackItem()
577         tstate->exc_info = exc_info;  in _PyErr_ChainStackItem()
584     exc2 = exc_info->exc_type;  in _PyErr_ChainStackItem()
585     val2 = exc_info->exc_value;  in _PyErr_ChainStackItem()
586     tb2 = exc_info->exc_traceback;  in _PyErr_ChainStackItem()
599         tstate->exc_info = saved_exc_info;  in _PyErr_ChainStackItem()