12478684aa
PR-URL: https://github.com/nodejs/node/pull/33579 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com>
65 lines
1.7 KiB
JavaScript
65 lines
1.7 KiB
JavaScript
// Copyright 2020 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: --allow-natives-syntax
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Object.prototype[1] = 153;
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Object.freeze(Object.prototype);
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(function TestSloppyStoreToReadOnlyProperty() {
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function foo() {
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let ar = [];
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for (let i = 0; i < 3; i++) {
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ar[i] = 42;
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if (i == 1) {
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// Attempt to overwrite read-only element should not change
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// array length.
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assertEquals(1, ar.length);
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} else {
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assertEquals(i + 1, ar.length);
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}
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}
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return ar;
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}
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assertEquals([42,153,42], foo());
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assertEquals([42,153,42], foo());
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assertEquals([42,153,42], foo());
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%PrepareFunctionForOptimization(foo);
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assertEquals([42,153,42], foo());
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%OptimizeFunctionOnNextCall(foo);
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assertEquals([42,153,42], foo());
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})();
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(function StrictStoreToReadOnlyProperty() {
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function foo() {
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"use strict";
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let ar = [];
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let threw_exception = false;
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for (let i = 0; i < 3; i++) {
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try {
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ar[i] = 42;
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} catch(e) {
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// Attempt to overwrite read-only element should throw and
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// should not change array length.
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assertTrue(i == 1);
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assertEquals(1, ar.length);
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assertInstanceof(e, TypeError);
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threw_exception = true;
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}
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}
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assertTrue(threw_exception);
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return ar;
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}
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assertEquals([42,153,42], foo());
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assertEquals([42,153,42], foo());
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assertEquals([42,153,42], foo());
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%PrepareFunctionForOptimization(foo);
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assertEquals([42,153,42], foo());
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%OptimizeFunctionOnNextCall(foo);
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assertEquals([42,153,42], foo());
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})();
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