b839ed4f24
These tests rely on dropping references to objects either explicitly ("o =
null;") or implicitly ("o goes out of scope") and then doing gc. It's essential
that we haven't already marked the WeakCell pointing to o and marked it alive
before dropping the reference.
BUG=v8:8179
Change-Id: Ie0b73f05c4baa937cf6f28325454ff9087a71a2c
Reviewed-on: https://chromium-review.googlesource.com/c/1306437
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57115}
50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
// Copyright 2018 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: --harmony-weak-refs --expose-gc --noincremental-marking
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// Test that WeakCell.prototype.clear() also clears the WeakFactory pointer of
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// WeakCell. The only way to observe this is to assert that the WeakCell no
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// longer keeps its WeakFactory alive after clear() has been called.
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let weak_cell;
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let weak_cell_pointing_to_factory;
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let cleanup1_call_count = 0;
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let cleanup2_call_count = 0;
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let cleanup1 = function() {
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++cleanup1_call_count;
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}
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let cleanup2 = function() {
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++cleanup2_call_count;
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}
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let wf1 = new WeakFactory(cleanup1);
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(function(){
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let wf2 = new WeakFactory(cleanup2);
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(function() {
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let object = {};
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weak_cell = wf2.makeCell(object);
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// object goes out of scope.
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})();
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weak_cell_pointing_to_factory = wf1.makeCell(wf2);
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// wf goes out of scope
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})();
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weak_cell.clear();
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gc();
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// Assert that weak_cell_pointing_to_factory now got cleared.
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let timeout_func = function() {
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assertEquals(1, cleanup1_call_count);
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assertEquals(0, cleanup2_call_count);
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}
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setTimeout(timeout_func, 0);
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