forked from mirrors/gecko-dev
246 lines
8.4 KiB
JavaScript
246 lines
8.4 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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/* This test records at which phase of startup the JS modules are first
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* loaded.
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* If you made changes that cause this test to fail, it's likely because you
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* are loading more JS code during startup.
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* Most code has no reason to run off of the app-startup notification
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* (this is very early, before we have selected the user profile, so
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* preferences aren't accessible yet).
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* If your code isn't strictly required to show the first browser window,
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* it shouldn't be loaded before we are done with first paint.
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* Finally, if your code isn't really needed during startup, it should not be
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* loaded before we have started handling user events.
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*/
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"use strict";
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/* Set this to true only for debugging purpose; it makes the output noisy. */
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const kDumpAllStacks = false;
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const startupPhases = {
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// For app-startup, we have an allowlist of acceptable JS files.
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// Anything loaded during app-startup must have a compelling reason
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// to run before we have even selected the user profile.
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// Consider loading your code after first paint instead,
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// eg. from BrowserGlue.sys.mjs' _onFirstWindowLoaded method).
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"before profile selection": {
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allowlist: {
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modules: new Set([
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"resource:///modules/BrowserGlue.sys.mjs",
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"resource:///modules/StartupRecorder.sys.mjs",
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"resource://gre/modules/AppConstants.sys.mjs",
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"resource://gre/modules/ActorManagerParent.sys.mjs",
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"resource://gre/modules/CustomElementsListener.sys.mjs",
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"resource://gre/modules/MainProcessSingleton.sys.mjs",
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"resource://gre/modules/XPCOMUtils.sys.mjs",
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]),
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},
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},
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// For the following phases of startup we have only a list of files that
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// are **not** allowed to load in this phase, as too many other scripts
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// load during this time.
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// We are at this phase after creating the first browser window (ie. after final-ui-startup).
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"before opening first browser window": {
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denylist: {
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modules: new Set([]),
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},
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},
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// We reach this phase right after showing the first browser window.
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// This means that anything already loaded at this point has been loaded
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// before first paint and delayed it.
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"before first paint": {
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denylist: {
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modules: new Set([
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"resource:///modules/AboutNewTab.jsm",
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"resource:///modules/BrowserUsageTelemetry.jsm",
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"resource:///modules/ContentCrashHandlers.jsm",
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"resource:///modules/ShellService.jsm",
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"resource://gre/modules/NewTabUtils.sys.mjs",
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"resource://gre/modules/PageThumbs.jsm",
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"resource://gre/modules/PlacesUtils.sys.mjs",
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"resource://gre/modules/Preferences.sys.mjs",
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"resource://gre/modules/SearchService.sys.mjs",
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"resource://gre/modules/Sqlite.sys.mjs",
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]),
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services: new Set(["@mozilla.org/browser/search-service;1"]),
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},
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},
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// We are at this phase once we are ready to handle user events.
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// Anything loaded at this phase or before gets in the way of the user
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// interacting with the first browser window.
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"before handling user events": {
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denylist: {
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modules: new Set([
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"resource://gre/modules/Blocklist.jsm",
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// Bug 1391495 - BrowserWindowTracker.jsm is intermittently used.
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// "resource:///modules/BrowserWindowTracker.jsm",
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"resource://gre/modules/BookmarkHTMLUtils.sys.mjs",
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"resource://gre/modules/Bookmarks.sys.mjs",
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"resource://gre/modules/ContextualIdentityService.sys.mjs",
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"resource://gre/modules/FxAccounts.sys.mjs",
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"resource://gre/modules/FxAccountsStorage.sys.mjs",
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"resource://gre/modules/PlacesBackups.sys.mjs",
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"resource://gre/modules/PlacesExpiration.sys.mjs",
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"resource://gre/modules/PlacesSyncUtils.sys.mjs",
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"resource://gre/modules/PushComponents.sys.mjs",
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]),
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services: new Set(["@mozilla.org/browser/nav-bookmarks-service;1"]),
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},
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},
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// Things that are expected to be completely out of the startup path
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// and loaded lazily when used for the first time by the user should
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// be listed here.
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"before becoming idle": {
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denylist: {
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modules: new Set([
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"resource://gre/modules/AsyncPrefs.sys.mjs",
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"resource://gre/modules/LoginManagerContextMenu.sys.mjs",
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"resource://gre/modules/osfile.jsm",
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"resource://pdf.js/PdfStreamConverter.sys.mjs",
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]),
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},
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},
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};
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if (
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Services.prefs.getBoolPref("browser.startup.blankWindow") &&
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Services.prefs.getCharPref(
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"extensions.activeThemeID",
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"default-theme@mozilla.org"
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) == "default-theme@mozilla.org"
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) {
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startupPhases["before profile selection"].allowlist.modules.add(
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"resource://gre/modules/XULStore.sys.mjs"
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);
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}
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if (AppConstants.MOZ_CRASHREPORTER) {
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startupPhases["before handling user events"].denylist.modules.add(
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"resource://gre/modules/CrashSubmit.sys.mjs"
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);
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}
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add_task(async function() {
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if (
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!AppConstants.NIGHTLY_BUILD &&
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!AppConstants.MOZ_DEV_EDITION &&
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!AppConstants.DEBUG
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) {
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ok(
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!("@mozilla.org/test/startuprecorder;1" in Cc),
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"the startup recorder component shouldn't exist in this non-nightly/non-devedition/" +
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"non-debug build."
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);
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return;
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}
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let startupRecorder = Cc["@mozilla.org/test/startuprecorder;1"].getService()
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.wrappedJSObject;
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await startupRecorder.done;
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let data = Cu.cloneInto(startupRecorder.data.code, {});
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function getStack(scriptType, name) {
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if (scriptType == "modules") {
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return Cu.getModuleImportStack(name);
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}
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return "";
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}
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// This block only adds debug output to help find the next bugs to file,
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// it doesn't contribute to the actual test.
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SimpleTest.requestCompleteLog();
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let previous;
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for (let phase in data) {
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for (let scriptType in data[phase]) {
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for (let f of data[phase][scriptType]) {
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// phases are ordered, so if a script wasn't loaded yet at the immediate
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// previous phase, it wasn't loaded during any of the previous phases
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// either, and is new in the current phase.
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if (!previous || !data[previous][scriptType].includes(f)) {
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info(`${scriptType} loaded ${phase}: ${f}`);
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if (kDumpAllStacks) {
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info(getStack(scriptType, f));
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}
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}
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}
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}
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previous = phase;
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}
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for (let phase in startupPhases) {
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let loadedList = data[phase];
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let allowlist = startupPhases[phase].allowlist || null;
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if (allowlist) {
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for (let scriptType in allowlist) {
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loadedList[scriptType] = loadedList[scriptType].filter(c => {
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if (!allowlist[scriptType].has(c)) {
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return true;
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}
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allowlist[scriptType].delete(c);
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return false;
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});
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is(
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loadedList[scriptType].length,
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0,
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`should have no unexpected ${scriptType} loaded ${phase}`
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);
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for (let script of loadedList[scriptType]) {
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let message = `unexpected ${scriptType}: ${script}`;
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record(false, message, undefined, getStack(scriptType, script));
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}
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is(
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allowlist[scriptType].size,
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0,
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`all ${scriptType} allowlist entries should have been used`
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);
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for (let script of allowlist[scriptType]) {
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ok(false, `unused ${scriptType} allowlist entry: ${script}`);
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}
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}
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}
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let denylist = startupPhases[phase].denylist || null;
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if (denylist) {
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for (let scriptType in denylist) {
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for (let file of denylist[scriptType]) {
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let loaded = loadedList[scriptType].includes(file);
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let message = `${file} is not allowed ${phase}`;
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if (!loaded) {
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ok(true, message);
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} else {
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record(false, message, undefined, getStack(scriptType, file));
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}
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}
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}
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if (denylist.modules) {
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let results = await PerfTestHelpers.throttledMapPromises(
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denylist.modules,
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async uri => ({
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uri,
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exists: await PerfTestHelpers.checkURIExists(uri),
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})
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);
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for (let { uri, exists } of results) {
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ok(exists, `denylist entry ${uri} for phase "${phase}" must exist`);
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}
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}
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if (denylist.services) {
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for (let contract of denylist.services) {
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ok(
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contract in Cc,
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`denylist entry ${contract} for phase "${phase}" must exist`
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);
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}
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}
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}
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}
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});
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