Apd |char* |savesharedpv |const char* pv
Apd |char* |savepvn |const char* pv|I32 len
Ap |void |savestack_grow
+Ap |void |savestack_grow_cnt |I32 need
Ap |void |save_aelem |AV* av|I32 idx|SV **sptr
Ap |I32 |save_alloc |I32 size|I32 pad
Ap |void |save_aptr |AV** aptr