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>
75 lines
1.7 KiB
JavaScript
75 lines
1.7 KiB
JavaScript
// Copyright 2019 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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(function NonExtensibleBetweenSetterAndGetter() {
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o = {};
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o.x = 42;
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o.__defineGetter__('y', function() {});
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Object.preventExtensions(o);
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o.__defineSetter__('y', function() {});
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o.x = 0.1;
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})();
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(function InterleavedIntegrityLevel() {
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o = {};
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o.x = 42;
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o.__defineSetter__('y', function() {});
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Object.preventExtensions(o);
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o.__defineGetter__('y', function() {
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return 44;
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});
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Object.seal(o);
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o.x = 0.1;
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assertEquals(44, o.y);
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})();
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(function TryUpdateRepeatedIntegrityLevel() {
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function C() {
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this.x = 0;
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this.x = 1;
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Object.preventExtensions(this);
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Object.seal(this);
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}
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const o1 = new C();
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const o2 = new C();
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const o3 = new C();
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function f(o) {
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return o.x;
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}
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// Warm up the IC.
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%PrepareFunctionForOptimization(f);
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f(o1);
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f(o1);
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f(o1);
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// Reconfigure to double field.
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o3.x = 0.1;
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// Migrate o2 to the new shape. (This won't mark the new map as a migration target.)
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assertEquals(o2, %TryMigrateInstance(o2));
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%OptimizeFunctionOnNextCall(f);
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// Calling the function with the deprecated o1 should still be ok.
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f(o1);
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// Ensure o1 is migrated (e.g. in jitless mode, where the unoptimized f won't
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// necessarily migrate it).
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let migrated = %TryMigrateInstance(o1);
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if (typeof migrated === 'number') {
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// No migration happened (o1 was already migrated).
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migrated = o1;
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}
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assertEquals(o1, migrated);
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assertTrue(%HaveSameMap(o1, o2));
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assertTrue(%HaveSameMap(o1, o3));
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})();
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