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