mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-26 01:35:08 +02:00
b4185f0ecd
Use dedicated Packed branches in GetByValue and PutByValue so in-bounds indexed accesses can skip hole checks and slot reloads. Keep Holey writes on the guarded arm, and keep append writes on the C++ slow path so PutByValue still respects non-extensible indexed objects and arrays with a non-writable length. Add a bytecode regression that exercises both append failure cases through the real js binary path.
32 lines
767 B
JavaScript
32 lines
767 B
JavaScript
"use strict";
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function expect_type_error(callback) {
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let did_throw = false;
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try {
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callback();
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} catch (error) {
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if (!(error instanceof TypeError))
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throw error;
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did_throw = true;
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}
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if (!did_throw)
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throw new Error("Expected TypeError");
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}
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let object = Object.preventExtensions({ 0: 1 });
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expect_type_error(() => {
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object[1] = 2;
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});
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if (object[1] !== undefined)
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throw new Error("Indexed object append mutated");
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let array = [1, 2];
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Object.defineProperty(array, "length", { writable: false });
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expect_type_error(() => {
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array[array.length] = 3;
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});
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if (array.length !== 2)
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throw new Error("Array length changed");
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if (array[2] !== undefined)
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throw new Error("Array append mutated");
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