Closed
Description
- Version: master
- Platform: all
- Subsystem: vm
Very similar to #17480, except the issue now is with Object.getOwnPropertyDescriptor rather than in operator.
const globals = {};
const handlers = {};
const realHandlers = Reflect.ownKeys(Reflect).reduce((handlers, p) => {
handlers[p] = (t, ...args) => {
// Avoid printing the Receiver argument, which can lead to an infinite loop.
console.log(p, ...(p === 'get' || p === 'set' ? args.slice(0, -1) : args));
return Reflect[p](t, ...args);
};
return handlers;
}, {});
const proxy = vm.createContext(new Proxy(globals, handlers));
// Indirection needed to mitigate against #17465
// https://github.com/nodejs/node/issues/17465
const globalProxy = vm.runInContext('this', proxy);
for (const k of Reflect.ownKeys(globalProxy)) {
Object.defineProperty(globals, k, Object.getOwnPropertyDescriptor(globalProxy, k));
}
Object.assign(handlers, realHandlers);
Object.getOwnPropertyDescriptor(proxy, "a")
// prints "getOwnPropertyDescriptor a"
// returns undefined
vm.runInContext('Object.getOwnPropertyDescriptor(this, "a")', proxy);
// prints "get Object"
// prints "getOwnPropertyDescriptor a"
// prints "get a"
// prints "get a"
// returns { value: undefined,
// writable: true,
// enumerable: false,
// configurable: true } (because of https://github.com/nodejs/node/issues/17465)