527754fbae
For dictionary mode objects, whether or not a property is constant was not tracked before. This CL makes the required non-Turbofan changes, guarded behind the new flag V8_DICT_PROPERTY_CONST_TRACKING. In addition, prototypes are not converted to fast mode objects if this flags is enabled. Bug: v8:11247 Change-Id: Ia5942733239a97560b6efc015f0e25a35fea3d7a Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2566757 Commit-Queue: Frank Emrich <emrich@google.com> Reviewed-by: Igor Sheludko <ishell@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#72524}
39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
JavaScript
// Copyright 2017 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 TestBuiltinSubclassing(Builtin) {
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assertTrue(%HasFastProperties(Builtin));
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assertTrue(%HasFastProperties(Builtin.prototype));
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin.prototype.__proto__));
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class SubClass extends Builtin {}
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin));
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin.prototype));
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assertEquals(!%IsDictPropertyConstTrackingEnabled(),
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%HasFastProperties(Builtin.prototype.__proto__));
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}
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let TypedArray = Uint8Array.__proto__;
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TestBuiltinSubclassing(RegExp);
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TestBuiltinSubclassing(Promise);
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TestBuiltinSubclassing(Array);
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TestBuiltinSubclassing(TypedArray);
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TestBuiltinSubclassing(Uint8Array);
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TestBuiltinSubclassing(Int8Array);
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TestBuiltinSubclassing(Uint16Array);
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TestBuiltinSubclassing(Int16Array);
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TestBuiltinSubclassing(Uint32Array);
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TestBuiltinSubclassing(Int32Array);
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TestBuiltinSubclassing(Float32Array);
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TestBuiltinSubclassing(Float64Array);
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TestBuiltinSubclassing(Uint8ClampedArray);
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