modsys: exc_info: Add traceback

Add traceback chain to sys.exec_info()[2].
No actual frame info is added, but just enough to recreate the printed
exception traceback.

Used by the unittest module which collects errors and failures and prints
them at the end.

1 files changed, 1 insertions, 0 deletions

diff --git a/py/obj.h b/py/obj.h
index 59cce0836..8b6772873 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -717,6 +717,7 @@ bool mp_obj_exception_match(mp_obj_t exc, mp_const_obj_t exc_type);
 void mp_obj_exception_clear_traceback(mp_obj_t self_in);
 void mp_obj_exception_add_traceback(mp_obj_t self_in, qstr file, size_t line, qstr block);
 void mp_obj_exception_get_traceback(mp_obj_t self_in, size_t *n, size_t **values);
+mp_obj_t mp_obj_exception_get_traceback_obj(mp_obj_t self_in);
 mp_obj_t mp_obj_exception_get_value(mp_obj_t self_in);
 mp_obj_t mp_obj_exception_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args);
 mp_obj_t mp_alloc_emergency_exception_buf(mp_obj_t size_in);