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Kmake/deps/v8/test/mjsunit/shared-memory/private-brand.js
2026-05-26 23:36:42 -07:00

27 lines
836 B
JavaScript

// Copyright 2023 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Flags: --harmony-struct
// Private brands from private methods should not be able to extend shared
// objects. This is unlike ordinary objects, which can get private fields even
// if sealed/frozen.
function TestSharedObjectCannotAddPrivateBrand(sharedObj) {
function Base() {
return sharedObj;
}
assertThrows(() => {
class C extends Base {
#o() {}
}
return new C();
});
}
TestSharedObjectCannotAddPrivateBrand(new Atomics.Condition());
TestSharedObjectCannotAddPrivateBrand(new Atomics.Mutex());
TestSharedObjectCannotAddPrivateBrand(new (new SharedStructType(['p'])));
TestSharedObjectCannotAddPrivateBrand(new SharedArray(1));