efdf87aff8
This is a reland of 1025bf26e3
Changes since revert:
- TSAN issue fixed by https://crrev.com/c/3475084
- Skip the shared-struct-workers test until shared GC deadlock is fixed,
being tracked in v8:12645
Original change's description:
> [shared-struct] Prototype JS shared structs
>
> Unlike the Stage 1 proposal, for simplicity the prototype does not add
> any new syntax, instead opting for exposing a SharedStructType
> constructor which takes an array of field names. This type constructor
> returns constructors for shared structs.
>
> Shared structs can be shared across Isolates, are fixed layout, have no
> prototype, have no .constructor, and can only store primitives and
> other shared structs.
>
> The initial prototype does not have TurboFan support.
>
> Bug: v8:12547
> Change-Id: I23bdd819940b42139692bcdb53d372099b0d4426
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3390643
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Shu-yu Guo <syg@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79156}
Bug: v8:12547
Change-Id: Ic1f5cf9fa9791ae2d5d5dc7c110614ca10b5d98e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3475078
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79215}
40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
// Copyright 2022 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: --shared-string-table --harmony-struct --allow-natives-syntax
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"use strict";
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if (this.Worker) {
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(function TestSharedStructPostMessage() {
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let workerScript =
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`onmessage = function(struct) {
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struct.struct_field.payload = 42;
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struct.string_field = "worker";
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postMessage("done");
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};
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postMessage("started");`;
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let worker = new Worker(workerScript, { type: 'string' });
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let started = worker.getMessage();
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assertEquals("started", started);
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let OuterStruct = new SharedStructType(['string_field', 'struct_field']);
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let InnerStruct = new SharedStructType(['payload']);
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let struct = new OuterStruct();
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struct.struct_field = new InnerStruct();
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struct.string_field = "main";
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assertEquals("main", struct.string_field);
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assertEquals(undefined, struct.struct_field.payload);
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worker.postMessage(struct);
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assertEquals("done", worker.getMessage());
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assertEquals("worker", struct.string_field);
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assertEquals(42, struct.struct_field.payload);
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worker.terminate();
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})();
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}
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