cpython/Include/traceback.h

#ifndef Py_TRACEBACK_H
#define Py_TRACEBACK_H
#ifdef __cplusplus
extern "C" {
#endif

struct _frame;

/* Traceback interface */
#ifndef Py_LIMITED_API
typedef struct _traceback {
    PyObject_HEAD
    struct _traceback *tb_next;
    struct _frame *tb_frame;
    int tb_lasti;
    int tb_lineno;
} PyTracebackObject;
#endif

PyAPI_FUNC(int) PyTraceBack_Here(struct _frame *);
PyAPI_FUNC(int) PyTraceBack_Print(PyObject *, PyObject *);
#ifndef Py_LIMITED_API
PyAPI_FUNC(int) _Py_DisplaySourceLine(PyObject *, PyObject *, int, int);
#endif

/* Reveal traceback type so we can typecheck traceback objects */
PyAPI_DATA(PyTypeObject) PyTraceBack_Type;
#define PyTraceBack_Check(v) (Py_TYPE(v) == &PyTraceBack_Type)

#ifdef __cplusplus
}
#endif
#endif /* !Py_TRACEBACK_H */