add detour_free_unused_regions

src/mach_detours.c

@@ -1001,6 +1001,16 @@ bool detour_set_retain_regions(const bool value)
     return previous;
 }
 
+mach_error_t detour_free_unused_regions()
+{
+    if (s_transaction_thread != mach_thread_self()) {
+        return detour_err_wrong_thread;
+    }
+
+    internal_detour_free_unused_trampoline_regions();
+    return err_none;
+}
+
 void* detour_set_system_region_lower_bound(void* value)
 {
     void* previous = s_system_region_lower_bound;