Function lua_getinfo

third-party/lua-5.2.4/src/ldebug.c:281–311

LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
  int status;
  Closure *cl;
  CallInfo *ci;
  StkId func;
  lua_lock(L);
  swapextra(L);
  if (*what == '>') {
    ci = NULL;
    func = L->top - 1;
    api_check(L, ttisfunction(func), "function expected");
    what++;  /* skip the '>' */
    L->top--;  /* pop function */
  }
  else {
    ci = ar->i_ci;
    func = ci->func;
    lua_assert(ttisfunction(ci->func));
  }
  cl = ttisclosure(func) ? clvalue(func) : NULL;
  status = auxgetinfo(L, what, ar, cl, ci);
  if (strchr(what, 'f')) {
    setobjs2s(L, L->top, func);
    api_incr_top(L);
  }
  swapextra(L);
  if (strchr(what, 'L'))
    collectvalidlines(L, cl);
  lua_unlock(L);
  return status;
}


/*