typedef void (dummy_frame_dtor_ftype) (void *data, int registers_valid);
/* Call DTOR with DTOR_DATA when DUMMY_ID frame of thread PTID gets discarded.
- Dummy frame with DUMMY_ID must exist. There must be no other call of
- register_dummy_frame_dtor for that dummy frame. */
+ Dummy frame with DUMMY_ID must exist. Multiple destructors may be
+ registered, they will be called in the reverse order of registrations
+ (LIFO). */
extern void register_dummy_frame_dtor (struct frame_id dummy_id, ptid_t ptid,
dummy_frame_dtor_ftype *dtor,
void *dtor_data);
-/* Return 1 if there exists dummy frame with registered DTOR and DTOR_DATA.
- Return 0 otherwise. */
+/* Return 1 if there exists any dummy frame with any of its registered
+ destructors equal to both DTOR and DTOR_DATA. Return 0 otherwise. */
extern int find_dummy_frame_dtor (dummy_frame_dtor_ftype *dtor,
void *dtor_data);