918fe04351
PR-URL: https://github.com/nodejs/node/pull/58070 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
41 lines
1.4 KiB
JavaScript
41 lines
1.4 KiB
JavaScript
// Copyright 2024 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Flags: --harmony-struct
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// If Promise.prototype.then is set to a non-callable, builtin
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// promises become non thenables, hence any promise resolve to
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// them calls its reactions instead of queing a then task.
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// In the current implementation an internal promise with
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// a reaction to release the lock is resolved to the result of
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// the asyncLock callback, causing the unlock microtask to
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// be executed before the asyncLock callback finishes. This test
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// should be updated if the behavior intentionally changes.
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(function TestAsyncWaitPromisePrototypeTampering() {
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const mutex = new Atomics.Mutex;
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const cv = new Atomics.Condition;
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let finishedExecution = false;
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let startedExecution = false;
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let lockAsyncPromise = Atomics.Mutex.lockAsync(mutex, async () => {
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startedExecution = true;
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await Atomics.Condition.waitAsync(cv, mutex);
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finishedExecution = true;
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});
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let thenExecuted = false;
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lockAsyncPromise.then(() => {
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thenExecuted = true;
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});
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Promise.prototype.then = undefined;
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// Run Microtasks
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setTimeout(() => {
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assertTrue(startedExecution);
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assertFalse(finishedExecution);
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// The lockAsyncPromise is resolved even though the async callback
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// didn't finish executing.
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assertTrue(thenExecuted);
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}, 0);
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})();
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