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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/. */
/**
* Test the No Stack Sampling feature.
*/
add_task(async function test_profile_feature_nostacksampling() {
Assert.ok(
!Services.profiler.IsActive(),
"The profiler is not currently active"
);
await startProfiler({ features: ["js", "nostacksampling"] });
const url = BASE_URL + "do_work_500ms.html";
await BrowserTestUtils.withNewTab(url, async contentBrowser => {
const contentPid = await SpecialPowers.spawn(
contentBrowser,
[],
() => Services.appinfo.processID
);
// Wait 500ms so that the tab finishes executing.
await wait(500);
// Check that we can get no stacks when the feature is turned on.
{
const { parentThread, contentThread } =
await stopProfilerNowAndGetThreads(contentPid);
Assert.equal(
parentThread.samples.data.length,
0,
"Stack samples were recorded from the parent process' main thread" +
"when the No Stack Sampling feature was turned on."
);
Assert.equal(
contentThread.samples.data.length,
0,
"Stack samples were recorded from the content process' main thread" +
"when the No Stack Sampling feature was turned on."
);
}
// Flush out any straggling allocation markers that may have not been collected
// yet by starting and stopping the profiler once.
await startProfiler({ features: ["js"] });
// Now reload the tab with a clean run.
gBrowser.reload();
await wait(500);
// Check that stack samples were recorded.
{
const { parentThread, contentThread } =
await waitSamplingAndStopProfilerAndGetThreads(contentPid);
Assert.greater(
parentThread.samples.data.length,
0,
"No Stack samples were recorded from the parent process' main thread" +
"when the No Stack Sampling feature was not turned on."
);
Assert.greater(
contentThread.samples.data.length,
0,
"No Stack samples were recorded from the content process' main thread" +
"when the No Stack Sampling feature was not turned on."
);
}
});
});
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