Extract of Include/object.c:

#ifdef COUNT_ALLOCS
PyAPI_FUNC(void) inc_count(PyTypeObject *);
PyAPI_FUNC(void) dec_count(PyTypeObject *);

The "make smelly" fails with 10 symbols:

---
$ ./configure --with-pydebug CFLAGS="-D COUNT_ALLOCS -O0"
$ make smelly
(...)
./python Tools/scripts/smelly.py
+ nm -p libpython3.8dm.a
Ignored symbol types: b, d, r, t

Smelly symbol: dec_count (type: T)
Smelly symbol: dump_counts (type: T)
Smelly symbol: fast_tuple_allocs (type: C)
Smelly symbol: get_counts (type: T)
Smelly symbol: inc_count (type: T)
Smelly symbol: null_strings (type: C)
Smelly symbol: one_strings (type: C)
Smelly symbol: quick_int_allocs (type: C)
Smelly symbol: quick_neg_int_allocs (type: C)
Smelly symbol: tuple_zero_allocs (type: C)

ERROR: Found 10 smelly symbols!
---

These functions should be made private (declared with "static") or get a "Py_" prefix.