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859279017c
Depends on D26106 Differential Revision: https://phabricator.services.mozilla.com/D26107 --HG-- extra : moz-landing-system : lando
57 lines
2 KiB
JavaScript
57 lines
2 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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* http://creativecommons.org/publicdomain/zero/1.0/ */
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"use strict";
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// Load the tracker in a dedicated loader using invisibleToDebugger and freshCompartment
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// so that it can inspect any other module/compartment, even DevTools, chrome,
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// and this script!
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const { DevToolsLoader } = ChromeUtils.import("resource://devtools/shared/Loader.jsm");
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const loader = new DevToolsLoader();
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loader.invisibleToDebugger = true;
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loader.freshCompartment = true;
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const { allocationTracker } =
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loader.require("chrome://mochitests/content/browser/devtools/shared/test-helpers/allocation-tracker");
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add_task(async function() {
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// Use a sandbox to allocate test javascript object in order to avoid any
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// external noise
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const global = Cu.Sandbox("http://example.com");
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const tracker = allocationTracker({ watchGlobal: global });
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const before = tracker.stillAllocatedObjects();
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/* eslint-disable no-undef */
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Cu.evalInSandbox("let list; new " + function() {
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list = [];
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for (let i = 0; i < 1000; i++) {
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list.push({});
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}
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}, global, undefined, "test-file.js", 1);
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/* eslint-enable no-undef */
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const allocations = tracker.countAllocations();
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ok(allocations > 1000,
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`At least 1000 objects are reported as created (${allocations})`);
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// Uncomment this and comment the call to `countAllocations` to debug the allocations.
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// The call to `countAllocations` will reset the allocation record.
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// tracker.logAllocationSites();
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const afterCreation = tracker.stillAllocatedObjects();
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ok(afterCreation - before > 1000,
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`At least 1000 more objects are reported still allocated (${before}` +
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` + ${afterCreation - before} -> ${afterCreation})`);
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Cu.evalInSandbox("list = null;", global, undefined, "test-file.js", 7);
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Cu.forceGC();
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Cu.forceCC();
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const afterGC = tracker.stillAllocatedObjects();
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ok(afterCreation - afterGC > 1000,
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`At least 1000 less objects are reported still allocated (${afterCreation}` +
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` -(${afterGC - afterCreation})-> ${afterGC})`);
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tracker.stop();
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});
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