Function sweepthread

freebsd/contrib/openzfs/module/lua/lgc.c:697–704

** sweep the (open) upvalues of a thread and resize its stack and ** list of call-info structures. */

** list of call-info structures.
*/
static void sweepthread (lua_State *L, lua_State *L1) {
  if (L1->stack == NULL) return;  /* stack not completely built yet */
  sweepwholelist(L, &L1->openupval);  /* sweep open upvalues */
  luaE_freeCI(L1);  /* free extra CallInfo slots */
  /* should not change the stack during an emergency gc cycle */
  if (G(L)->gckind != KGC_EMERGENCY)
    luaD_shrinkstack(L1);
}


/*