browser_test_markers_gc_cc.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

add_task(async function test_markers_gc_cc() {

  info("Test GC&CC markers.");

  info("Create a throwaway profile.");

  await startProfiler({});

  let tempProfileContainer = { profile: null };

  tempProfileContainer.profile = await waitSamplingAndStopAndGetProfile();

  info("Restart the profiler.");

  await startProfiler({});

  info("Throw away the previous profile, which should be garbage-collected.");

  Assert.equal(

    typeof tempProfileContainer.profile,

    "object",

    "Previously-captured profile should be an object"

);

  delete tempProfileContainer.profile;

  Assert.equal(

    typeof tempProfileContainer.profile,

    "undefined",

    "Deleted profile should now be undefined"

);

  info("Force GC&CC");

  SpecialPowers.gc();

  SpecialPowers.forceShrinkingGC();

  SpecialPowers.forceCC();

  SpecialPowers.gc();

  SpecialPowers.forceShrinkingGC();

  SpecialPowers.forceCC();

  info("Stop the profiler and get the profile.");

  const profile = await waitSamplingAndStopAndGetProfile();

  const markers = getInflatedMarkerData(profile.threads[0]);

  Assert.ok(

    markers.some(({ data }) => data?.type === "GCSlice"),

    "A GCSlice marker was recorded"

);

  Assert.ok(

    markers.some(({ data }) => data?.type === "CCSlice"),

    "A CCSlice marker was recorded"

);

});