mirror of
https://github.com/dart-lang/sdk
synced 2024-10-14 11:03:19 +00:00
98808385d0
The recent rewrite of [0] kept the existing semantics of the finalizer implementation but migrated to the new interop semantics. Turns out in that existing semantics there's a bug, namely that it casted the peer object of to a non-nullable [Object] which is incorrect. This CL * fixes the cast to non-nullable [Object] * moves the (currently) web-specific tests for [Finalizer]/[WeakReference] into `corelib` so it runs on all backends * expands the finalizer tests to check finalizers get invoked * expands the weak reference test to ensure weak reference is cleared [0] https://dart-review.googlesource.com/c/sdk/+/363082/ Issue https://github.com/dart-lang/sdk/issues/55474 Change-Id: Ibd8c186b39100cff9e2f437f1a737034a5364830 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/363581 Reviewed-by: Ömer Ağacan <omersa@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com>
104 lines
3 KiB
Dart
104 lines
3 KiB
Dart
// Copyright (c) 2024, 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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import 'package:async_helper/async_helper.dart';
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import 'package:expect/expect.dart';
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import 'package:expect/config.dart';
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final invalidObjects = [true, 1, 1.2, 'a'];
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main() async {
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testFinalizerAttachDetachArgumentValidation();
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// This test doesn't work reliably on the web yet as it's hard to trigger GC
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// that will run finalizer and weak reference processing.
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if (isVmConfiguration) {
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asyncStart();
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await testFinalizerInvocation();
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asyncEnd();
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}
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}
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void testFinalizerAttachDetachArgumentValidation() {
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final finalizer = Finalizer<Foo?>((Foo? foo) {});
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final foo = Foo();
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// Tests invalid arguments.
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for (final invalid in invalidObjects) {
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// Test invalid targets.
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Expect.throws(() => finalizer.attach(invalid, foo));
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Expect.throws(() => finalizer.attach(invalid, null));
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Expect.throws(() => finalizer.attach(invalid, foo, detach: foo));
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Expect.throws(() => finalizer.attach(invalid, null, detach: null));
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// Test invalid detach tokens.
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Expect.throws(() => finalizer.attach(foo, foo, detach: invalid));
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Expect.throws(() => finalizer.attach(foo, null, detach: invalid));
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Expect.throws(() => finalizer.detach(invalid));
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}
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final target = Foo();
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// Should not cause errors to attach
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finalizer.attach(target, foo);
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finalizer.attach(target, null);
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finalizer.attach(target, foo, detach: target);
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// Can detach with arbitrary (valid) objects.
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finalizer.detach(target);
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finalizer.detach(foo);
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finalizer.detach({});
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}
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Future testFinalizerInvocation() async {
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final invokedPeers = <Foo>{};
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final expectedPeersInvoked = <Foo>{};
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final finalizer = Finalizer<Foo>((Foo peer) {
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invokedPeers.add(peer);
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asyncEnd();
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});
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{
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for (int i = 0; i < 10; ++i) {
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final peer = Foo();
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finalizer.attach(Foo(), peer, detach: peer);
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if (i % 3 == 0) {
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finalizer.detach(peer);
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} else {
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asyncStart();
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expectedPeersInvoked.add(peer);
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}
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}
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}
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asyncStart();
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while (invokedPeers.length < expectedPeersInvoked.length) {
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produceGarbage();
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await Future.delayed(const Duration(milliseconds: 10));
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}
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finalizer.detach(Foo()); // Dummy use of [finalizer] to ensure it's not GCed.
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for (final peer in expectedPeersInvoked) {
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Expect.isTrue(invokedPeers.contains(peer));
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}
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asyncEnd();
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}
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void produceGarbage() {
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const approximateWordSize = 4;
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List<dynamic> sink = [];
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for (int i = 0; i < 500; ++i) {
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final filler = i % 2 == 0 ? 1 : sink;
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if (i % 250 == 1) {
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// 2 x 25 MB in old space.
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sink = List.filled(25 * 1024 * 1024 ~/ approximateWordSize, filler);
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} else {
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// 498 x 50 KB in new space
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sink = List.filled(50 * 1024 ~/ approximateWordSize, filler);
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}
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}
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print(sink.hashCode); // Ensure there's real use of the allocation.
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}
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class Foo {}
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