7772a2df9dPR-URL: https://github.com/nodejs/node/pull/59805 Reviewed-By: Filip Skokan <panva.ip@gmail.com> Reviewed-By: Richard Lau <richard.lau@ibm.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
// Copyright 2025 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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// Flags: --js-base-64 --allow-natives-syntax
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const workerScript = `
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onmessage = function(event) {
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const sab = event.data.buffer;
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const uint8Array = new Uint8Array(sab);
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const dataToWrite = [102, 111, 111, 98, 97, 114, 255, 255];
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for (let i = 0; i < dataToWrite.length; ++i) {
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uint8Array[i] = dataToWrite[i];
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}
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postMessage("started");
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while (true) {
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for (let i = 0; i < dataToWrite.length; ++i) {
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uint8Array[i] = dataToWrite[i];
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}
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}
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};
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`;
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function testConcurrentSharedArrayBufferUint8ArraySetFromBase64() {
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const sab = new SharedArrayBuffer(8);
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const uint8ArrayMain = new Uint8Array(sab);
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// Create a worker
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const worker = new Worker(workerScript, {type: 'string'});
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// Send the SharedArrayBuffer
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worker.postMessage({buffer: sab});
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assertEquals('started', worker.getMessage());
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// Give the worker a little time to write
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for (let i = 0; i < 10000; ++i) {
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}
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// Call setFromBase64 on the main thread's view of the SAB
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for (let i = 0; i < 100; i++) {
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const result = uint8ArrayMain.setFromBase64('Zm9vYmFy');
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const actual = Array.from(uint8ArrayMain);
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assertEquals(
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actual, [102, 111, 111, 98, 97, 114, 255, 255],
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'setFromBase64 result mismatch with concurrent writes');
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}
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// Terminate the worker (now it should exit its loop)
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worker.terminate();
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}
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// Run the test function
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testConcurrentSharedArrayBufferUint8ArraySetFromBase64();
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