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}
71 lines
1.8 KiB
JavaScript
71 lines
1.8 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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let cleanup0_call_count = 0;
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let cleanup0_weak_cell_count = 0;
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let cleanup1_call_count = 0;
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let cleanup1_weak_cell_count = 0;
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let cleanup0 = function(iter) {
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for (wc of iter) {
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++cleanup0_weak_cell_count;
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}
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++cleanup0_call_count;
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}
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let cleanup1 = function(iter) {
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for (wc of iter) {
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++cleanup1_weak_cell_count;
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}
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++cleanup1_call_count;
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}
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let wf0 = new WeakFactory(cleanup0);
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let wf1 = new WeakFactory(cleanup1);
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// Create 1 WeakCell for each WeakFactory and kill the objects they point to.
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(function() {
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// The objects need to be inside a closure so that we can reliably kill them.
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let objects = [];
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objects[0] = {};
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objects[1] = {};
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wf0.makeCell(objects[0]);
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wf1.makeCell(objects[1]);
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// Drop the references to the objects.
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objects = [];
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// Will schedule both wf0 and wf1 for cleanup.
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gc();
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})();
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// Before the cleanup task has a chance to run, do the same thing again, so both
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// factories are (again) scheduled for cleanup. This has to be a IIFE function
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// (so that we can reliably kill the objects) so we cannot use the same function
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// as before.
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(function() {
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let objects = [];
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objects[0] = {};
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objects[1] = {};
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wf0.makeCell(objects[0]);
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wf1.makeCell(objects[1]);
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objects = [];
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gc();
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})();
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let timeout_func = function() {
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assertEquals(1, cleanup0_call_count);
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assertEquals(2, cleanup0_weak_cell_count);
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assertEquals(1, cleanup1_call_count);
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assertEquals(2, cleanup1_weak_cell_count);
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}
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// Give the cleanup task a chance to run. All WeakCells to cleanup will be
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// available during the same invocation of the cleanup function.
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setTimeout(timeout_func, 0);
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