forked from mirrors/gecko-dev
b3bf09cc0d
Backed out changeset 17d4c013ed92 (bug 1817183) Backed out changeset cfed8d9c23f3 (bug 1817183) Backed out changeset 62fe2f589efe (bug 1817182) Backed out changeset 557bd773fb85 (bug 1817179) Backed out changeset 7f8a7865868b (bug 1816934) Backed out changeset d6c1d4c0d2a0 (bug 1816934)
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.jsm",
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"resource://gre/modules/MainProcessSingleton.jsm",
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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.jsm",
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"resource://gre/modules/FxAccountsStorage.jsm",
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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.jsm",
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"resource://gre/modules/osfile.jsm",
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"resource://pdf.js/PdfStreamConverter.jsm",
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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.jsm"
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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.jsm"
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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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