Robert Nystrom
8a51cb6093
Change-Id: I8fafc8c2788faf848a8a8488b76cb163b7679308 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425330 Commit-Queue: Lasse Nielsen <lrn@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse Nielsen <lrn@google.com>
68 lines
1.9 KiB
Dart
68 lines
1.9 KiB
Dart
// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// VMOptions=--enable_fast_object_copy=true
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// VMOptions=--enable_fast_object_copy=false
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import 'dart:io';
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import "dart:isolate";
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import 'dart:typed_data';
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import "package:expect/expect.dart";
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main() async {
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final port = ReceivePort();
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await Isolate.spawn(runHelper, port.sendPort);
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final message = await port.first;
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final weakRef1copy = message[0] as WeakReference<Uint8List>;
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final weakRef2copy = message[1] as WeakReference<Uint8List>;
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final weakRef3copy = message[3] as WeakReference<Uint8List>;
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final weakRef4copy = message[5] as WeakReference<Uint8List>;
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Expect.isNull(weakRef1copy.target);
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Expect.equals(2, weakRef2copy.target?.length);
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Expect.isNull(weakRef3copy.target);
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Expect.equals(4, weakRef4copy.target?.length);
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port.close();
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}
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Future<void> runHelper(SendPort port) async {
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final object1 = Uint8List(1);
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final weakRef1 = WeakReference(object1);
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final object2 = Uint8List(2);
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final weakRef2 = WeakReference(object2);
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final object3 = Uint8List(3);
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final weakRef3 = WeakReference(object3);
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final object4 = Uint8List(4);
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final weakRef4 = WeakReference(object4);
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final key3 = Object();
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final expando3 = Expando();
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expando3[key3] = object3;
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final key4 = Object();
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final expando4 = Expando();
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expando4[key4] = object4;
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final message = <dynamic>[
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weakRef1, // Does not have its target included.
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weakRef2, // Has its target included later than itself.
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object2,
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weakRef3, // Does not have its target included.
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expando3,
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weakRef4, // Has its target included due to expando.
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expando4,
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key4,
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];
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port.send(message);
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}
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class Nonce {
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final int value;
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Nonce(this.value);
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String toString() => 'Nonce($value)';
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}
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