Function hookGlobalSymbolAccess

src/runtime_debug.js:116–126

* Intercept access to a symbols in the global symbol. This enables us to give * informative warnings/errors when folks attempt to use symbols they did not * include in their build, or no symbols that no longer exist. * * We don't define this in MODULARIZE mode since in that mode emscripten symb

(sym, func)

 * are never placed in the global scope.
 */
function hookGlobalSymbolAccess(sym, func) {
  if (!Object.getOwnPropertyDescriptor(globalThis, sym)) {
    Object.defineProperty(globalThis, sym, {
      configurable: true,
      get() {
        func();
        return undefined;
      }
    });
  }
}

function missingGlobal(sym, msg) {
  hookGlobalSymbolAccess(sym, () => {