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Test Info: Warnings
- This test gets skipped with pattern: tsan
- Manifest: tools/profiler/tests/browser/browser.toml
/* 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
/**
* Test that JS sources collected in a content process are propagated through
* the ShutdownProfile IPC message when that process shuts down.
*/
add_task(
async function test_js_sources_propagated_from_shutdown_content_process() {
// Disable the content process cache so the process is terminated gracefully
// (running ShutdownInternal -> GrabShutdownProfileAndShutdown) as soon as
// its tab is removed.
await SpecialPowers.pushPrefEnv({
set: [
["dom.ipc.keepProcessesAlive.web", 0],
["dom.ipc.processPreload.enabled", false],
],
});
Assert.ok(
!Services.profiler.IsActive(),
"The profiler is not currently active"
);
await ProfilerTestUtils.startProfiler({ features: ["js", "jssources"] });
let processShutdownPromise;
const token = crypto.randomUUID().replace(/-/g, "");
await BrowserTestUtils.withNewTab(
BASE_URL + "simple.html",
async contentBrowser => {
const pid = await SpecialPowers.spawn(contentBrowser, [], () => {
return Services.appinfo.processID;
});
const domProcess = ChromeUtils.getAllDOMProcesses().find(
p => p.osPid === pid
);
Assert.ok(!!domProcess, "Should find the content process");
// Execute identifiable JS so we have a source to look for in the final
// profile's additionalInformation. The function name is built from a
// random token at runtime so it never appears as a literal in the
// serialized SpecialPowers.spawn callback (which is itself a JS source
// captured in the content process).
await SpecialPowers.spawn(contentBrowser, [token], t => {
content.window.eval(
"function shutdownTestFn_" +
t +
"(){return 42;}" +
"shutdownTestFn_" +
t +
"();"
);
});
// Set up the shutdown observer before the tab is removed so we don't
// race against the ipc:content-shutdown notification.
processShutdownPromise = new Promise(resolve => {
Services.obs.addObserver(function obs(subject) {
if (
subject
.QueryInterface(Ci.nsIPropertyBag2)
.getProperty("childID") === domProcess.childID
) {
Services.obs.removeObserver(obs, "ipc:content-shutdown");
resolve();
}
}, "ipc:content-shutdown");
});
}
);
// Tab has been removed. Wait for the content process to fully shut down and
// send its ShutdownProfile IPC message to the parent.
await processShutdownPromise;
Services.profiler.Pause();
const profileData =
await Services.profiler.getProfileDataAsGzippedArrayBuffer();
await Services.profiler.StopProfiler();
Assert.ok(
!!profileData.additionalInformation,
"Profile should have additionalInformation"
);
const sources = profileData.additionalInformation.jsSources;
Assert.ok(!!sources, "additionalInformation should contain jsSources");
let foundTestFunction = false;
for (const sourceId in sources) {
const sourceText = sources[sourceId];
if (
typeof sourceText === "string" &&
sourceText.includes("shutdownTestFn_" + token)
) {
foundTestFunction = true;
break;
}
}
if (!foundTestFunction) {
info(
`Token: shutdownTestFn_${token}; jsSources entries: ${Object.keys(sources).length}`
);
}
Assert.ok(
foundTestFunction,
"JS sources from the shutdown content process should appear in the final profile"
);
}
);