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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/. */
+
+/* globals Assert */
+
+/**
+ * This file contains utilities that can be shared between xpcshell tests and mochitests.
+ */
+
+// The marker phases.
+const INSTANT = 0;
+const INTERVAL = 1;
+const INTERVAL_START = 2;
+const INTERVAL_END = 3;
+
+// This Services declaration may shadow another from head.js, so define it as
+// a var rather than a const.
+
+const defaultSettings = {
+ entries: 8 * 1024 * 1024, // 8M entries = 64MB
+ interval: 1, // ms
+ features: [],
+ threads: ["GeckoMain"],
+};
+
+// Effectively `async`: Start the profiler and return the `startProfiler`
+// promise that will get resolved when all child process have started their own
+// profiler.
+function startProfiler(callersSettings) {
+ if (Services.profiler.IsActive()) {
+ throw new Error(
+ "The profiler must not be active before starting it in a test."
+ );
+ }
+ const settings = Object.assign({}, defaultSettings, callersSettings);
+ return Services.profiler.StartProfiler(
+ settings.entries,
+ settings.interval,
+ settings.features,
+ settings.threads,
+ 0,
+ settings.duration
+ );
+}
+
+function startProfilerForMarkerTests() {
+ return startProfiler({
+ features: ["nostacksampling", "js"],
+ threads: ["GeckoMain", "DOM Worker"],
+ });
+}
+
+/**
+ * This is a helper function be able to run `await wait(500)`. Unfortunately
+ * this is needed as the act of collecting functions relies on the periodic
+ * sampling of the threads. See:
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1529053
+ *
+ * @param {number} time
+ * @returns {Promise}
+ */
+function wait(time) {
+ return new Promise(resolve => {
+ // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+ setTimeout(resolve, time);
+ });
+}
+
+/**
+ * Get the payloads of a type recursively, including from all subprocesses.
+ *
+ * @param {Object} profile The gecko profile.
+ * @param {string} type The marker payload type, e.g. "DiskIO".
+ * @param {Array} payloadTarget The recursive list of payloads.
+ * @return {Array} The final payloads.
+ */
+function getPayloadsOfTypeFromAllThreads(profile, type, payloadTarget = []) {
+ for (const { markers } of profile.threads) {
+ for (const markerTuple of markers.data) {
+ const payload = markerTuple[markers.schema.data];
+ if (payload && payload.type === type) {
+ payloadTarget.push(payload);
+ }
+ }
+ }
+
+ for (const subProcess of profile.processes) {
+ getPayloadsOfTypeFromAllThreads(subProcess, type, payloadTarget);
+ }
+
+ return payloadTarget;
+}
+
+/**
+ * Get the payloads of a type from a single thread.
+ *
+ * @param {Object} thread The thread from a profile.
+ * @param {string} type The marker payload type, e.g. "DiskIO".
+ * @return {Array} The payloads.
+ */
+function getPayloadsOfType(thread, type) {
+ const { markers } = thread;
+ const results = [];
+ for (const markerTuple of markers.data) {
+ const payload = markerTuple[markers.schema.data];
+ if (payload && payload.type === type) {
+ results.push(payload);
+ }
+ }
+ return results;
+}
+
+/**
+ * Applies the marker schema to create individual objects for each marker
+ *
+ * @param {Object} thread The thread from a profile.
+ * @return {InflatedMarker[]} The markers.
+ */
+function getInflatedMarkerData(thread) {
+ const { markers, stringTable } = thread;
+ return markers.data.map(markerTuple => {
+ const marker = {};
+ for (const [key, tupleIndex] of Object.entries(markers.schema)) {
+ marker[key] = markerTuple[tupleIndex];
+ if (key === "name") {
+ // Use the string from the string table.
+ marker[key] = stringTable[marker[key]];
+ }
+ }
+ return marker;
+ });
+}
+
+/**
+ * Applies the marker schema to create individual objects for each marker, then
+ * keeps only the network markers that match the profiler tests.
+ *
+ * @param {Object} thread The thread from a profile.
+ * @return {InflatedMarker[]} The filtered network markers.
+ */
+function getInflatedNetworkMarkers(thread) {
+ const markers = getInflatedMarkerData(thread);
+ return markers.filter(
+ m =>
+ m.data &&
+ m.data.type === "Network" &&
+ // We filter out network markers that aren't related to the test, to
+ // avoid intermittents.
+ m.data.URI.includes("/tools/profiler/")
+ );
+}
+
+/**
+ * From a list of network markers, this returns pairs of start/stop markers.
+ * If a stop marker can't be found for a start marker, this will return an array
+ * of only 1 element.
+ *
+ * @param {InflatedMarker[]} networkMarkers Network markers
+ * @return {InflatedMarker[][]} Pairs of network markers
+ */
+function getPairsOfNetworkMarkers(allNetworkMarkers) {
+ // For each 'start' marker we want to find the next 'stop' or 'redirect'
+ // marker with the same id.
+ const result = [];
+ const mapOfStartMarkers = new Map(); // marker id -> id in result array
+ for (const marker of allNetworkMarkers) {
+ const { data } = marker;
+ if (data.status === "STATUS_START") {
+ if (mapOfStartMarkers.has(data.id)) {
+ const previousMarker = result[mapOfStartMarkers.get(data.id)][0];
+ Assert.ok(
+ false,
+ `We found 2 start markers with the same id ${data.id}, without end marker in-between.` +
+ `The first marker has URI ${previousMarker.data.URI}, the second marker has URI ${data.URI}.` +
+ ` This should not happen.`
+ );
+ continue;
+ }
+
+ mapOfStartMarkers.set(data.id, result.length);
+ result.push([marker]);
+ } else {
+ // STOP or REDIRECT
+ if (!mapOfStartMarkers.has(data.id)) {
+ Assert.ok(
+ false,
+ `We found an end marker without a start marker (id: ${data.id}, URI: ${data.URI}). This should not happen.`
+ );
+ continue;
+ }
+ result[mapOfStartMarkers.get(data.id)].push(marker);
+ mapOfStartMarkers.delete(data.id);
+ }
+ }
+
+ return result;
+}
+
+/**
+ * It can be helpful to force the profiler to collect a JavaScript sample. This
+ * function spins on a while loop until at least one more sample is collected.
+ *
+ * @return {number} The index of the collected sample.
+ */
+function captureAtLeastOneJsSample() {
+ function getProfileSampleCount() {
+ const profile = Services.profiler.getProfileData();
+ return profile.threads[0].samples.data.length;
+ }
+
+ const sampleCount = getProfileSampleCount();
+ // Create an infinite loop until a sample has been collected.
+ while (true) {
+ if (sampleCount < getProfileSampleCount()) {
+ return sampleCount;
+ }
+ }
+}
+
+function isJSONWhitespace(c) {
+ return ["\n", "\r", " ", "\t"].includes(c);
+}
+
+function verifyJSONStringIsCompact(s) {
+ const stateData = 0;
+ const stateString = 1;
+ const stateEscapedChar = 2;
+ let state = stateData;
+ for (let i = 0; i < s.length; ++i) {
+ let c = s[i];
+ switch (state) {
+ case stateData:
+ if (isJSONWhitespace(c)) {
+ Assert.ok(
+ false,
+ `"Unexpected JSON whitespace at index ${i} in profile: <<<${s}>>>"`
+ );
+ return;
+ }
+ if (c == '"') {
+ state = stateString;
+ }
+ break;
+ case stateString:
+ if (c == '"') {
+ state = stateData;
+ } else if (c == "\\") {
+ state = stateEscapedChar;
+ }
+ break;
+ case stateEscapedChar:
+ state = stateString;
+ break;
+ }
+ }
+}
+
+/**
+ * This function pauses the profiler before getting the profile. Then after
+ * getting the data, the profiler is stopped, and all profiler data is removed.
+ * @returns {Promise<Profile>}
+ */
+async function stopNowAndGetProfile() {
+ // Don't await the pause, because each process will handle it before it
+ // receives the following `getProfileDataAsArrayBuffer()`.
+ Services.profiler.Pause();
+
+ const profileArrayBuffer = await Services.profiler.getProfileDataAsArrayBuffer();
+ await Services.profiler.StopProfiler();
+
+ const profileUint8Array = new Uint8Array(profileArrayBuffer);
+ const textDecoder = new TextDecoder("utf-8", { fatal: true });
+ const profileString = textDecoder.decode(profileUint8Array);
+ verifyJSONStringIsCompact(profileString);
+
+ return JSON.parse(profileString);
+}
+
+/**
+ * This function ensures there's at least one sample, then pauses the profiler
+ * before getting the profile. Then after getting the data, the profiler is
+ * stopped, and all profiler data is removed.
+ * @returns {Promise<Profile>}
+ */
+async function waitSamplingAndStopAndGetProfile() {
+ await Services.profiler.waitOnePeriodicSampling();
+ return stopNowAndGetProfile();
+}
+
+/**
+ * Verifies that a marker is an interval marker.
+ *
+ * @param {InflatedMarker} marker
+ * @returns {boolean}
+ */
+function isIntervalMarker(inflatedMarker) {
+ return (
+ inflatedMarker.phase === 1 &&
+ typeof inflatedMarker.startTime === "number" &&
+ typeof inflatedMarker.endTime === "number"
+ );
+}
+
+/**
+ * @param {Profile} profile
+ * @returns {Thread[]}
+ */
+function getThreads(profile) {
+ const threads = [];
+
+ function getThreadsRecursive(process) {
+ for (const thread of process.threads) {
+ threads.push(thread);
+ }
+ for (const subprocess of process.processes) {
+ getThreadsRecursive(subprocess);
+ }
+ }
+
+ getThreadsRecursive(profile);
+ return threads;
+}
+
+/**
+ * Find a specific marker schema from any process of a profile.
+ *
+ * @param {Profile} profile
+ * @param {string} name
+ * @returns {MarkerSchema}
+ */
+function getSchema(profile, name) {
+ {
+ const schema = profile.meta.markerSchema.find(s => s.name === name);
+ if (schema) {
+ return schema;
+ }
+ }
+ for (const subprocess of profile.processes) {
+ const schema = subprocess.meta.markerSchema.find(s => s.name === name);
+ if (schema) {
+ return schema;
+ }
+ }
+ console.error("Parent process schema", profile.meta.markerSchema);
+ for (const subprocess of profile.processes) {
+ console.error("Child process schema", subprocess.meta.markerSchema);
+ }
+ throw new Error(`Could not find a schema for "${name}".`);
+}
+
+/**
+ * This escapes all characters that have a special meaning in RegExps.
+ * This was stolen from https://github.com/sindresorhus/escape-string-regexp and
+ * so it is licence MIT and:
+ * Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://sindresorhus.com).
+ * See the full license in https://raw.githubusercontent.com/sindresorhus/escape-string-regexp/main/license.
+ * @param {string} string The string to be escaped
+ * @returns {string} The result
+ */
+function escapeStringRegexp(string) {
+ if (typeof string !== "string") {
+ throw new TypeError("Expected a string");
+ }
+
+ // Escape characters with special meaning either inside or outside character
+ // sets. Use a simple backslash escape when it’s always valid, and a `\xnn`
+ // escape when the simpler form would be disallowed by Unicode patterns’
+ // stricter grammar.
+ return string.replace(/[|\\{}()[\]^$+*?.]/g, "\\$&").replace(/-/g, "\\x2d");
+}
+
+/** ------ Assertions helper ------ */
+/**
+ * This assert helper function makes it easy to check a lot of properties in an
+ * object. We augment Assert.sys.mjs to make it easier to use.
+ */
+Object.assign(Assert, {
+ /*
+ * It checks if the properties on the right are all present in the object on
+ * the left. Note that the object might still have other properties (see
+ * objectContainsOnly below if you want the stricter form).
+ *
+ * The basic form does basic equality on each expected property:
+ *
+ * Assert.objectContains(fixture, {
+ * foo: "foo",
+ * bar: 1,
+ * baz: true,
+ * });
+ *
+ * But it also has a more powerful form with expectations. The available
+ * expectations are:
+ * - any(): this only checks for the existence of the property, not its value
+ * - number(), string(), boolean(), bigint(), function(), symbol(), object():
+ * this checks if the value is of this type
+ * - objectContains(expected): this applies Assert.objectContains()
+ * recursively on this property.
+ * - stringContains(needle): this checks if the expected value is included in
+ * the property value.
+ * - stringMatches(regexp): this checks if the property value matches this
+ * regexp. The regexp can be passed as a string, to be dynamically built.
+ *
+ * example:
+ *
+ * Assert.objectContains(fixture, {
+ * name: Expect.stringMatches(`Load \\d+:.*${url}`),
+ * data: Expect.objectContains({
+ * status: "STATUS_STOP",
+ * URI: Expect.stringContains("https://"),
+ * requestMethod: "GET",
+ * contentType: Expect.string(),
+ * startTime: Expect.number(),
+ * cached: Expect.boolean(),
+ * }),
+ * });
+ *
+ * Each expectation will translate into one or more Assert call. Therefore if
+ * one expectation fails, this will be clearly visible in the test output.
+ *
+ * Expectations can also be normal functions, for example:
+ *
+ * Assert.objectContains(fixture, {
+ * number: value => Assert.greater(value, 5)
+ * });
+ *
+ * Note that you'll need to use Assert inside this function.
+ */
+ objectContains(object, expectedProperties) {
+ // Basic tests: we don't want to run other assertions if these tests fail.
+ if (typeof object !== "object") {
+ this.ok(
+ false,
+ `The first parameter should be an object, but found: ${object}.`
+ );
+ return;
+ }
+
+ if (typeof expectedProperties !== "object") {
+ this.ok(
+ false,
+ `The second parameter should be an object, but found: ${expectedProperties}.`
+ );
+ return;
+ }
+
+ for (const key of Object.keys(expectedProperties)) {
+ const expected = expectedProperties[key];
+ if (!(key in object)) {
+ this.report(
+ true,
+ object,
+ expectedProperties,
+ `The object should contain the property "${key}", but it's missing.`
+ );
+ continue;
+ }
+
+ if (typeof expected === "function") {
+ // This is a function, so let's call it.
+ expected(
+ object[key],
+ `The object should contain the property "${key}" with an expected value and type.`
+ );
+ } else {
+ // Otherwise, we check for equality.
+ this.equal(
+ object[key],
+ expectedProperties[key],
+ `The object should contain the property "${key}" with an expected value.`
+ );
+ }
+ }
+ },
+
+ /**
+ * This is very similar to the previous `objectContains`, but this also looks
+ * at the number of the objects' properties. Thus this will fail if the
+ * objects don't have the same properties exactly.
+ */
+ objectContainsOnly(object, expectedProperties) {
+ // Basic tests: we don't want to run other assertions if these tests fail.
+ if (typeof object !== "object") {
+ this.ok(
+ false,
+ `The first parameter should be an object but found: ${object}.`
+ );
+ return;
+ }
+
+ if (typeof expectedProperties !== "object") {
+ this.ok(
+ false,
+ `The second parameter should be an object but found: ${expectedProperties}.`
+ );
+ return;
+ }
+
+ // In objectContainsOnly, we specifically want to check if all properties
+ // from the fixture object are expected.
+ // We'll be failing a test only for the specific properties that weren't
+ // expected, and only fail with one message, so that the test outputs aren't
+ // spammed.
+ const extraProperties = [];
+ for (const fixtureKey of Object.keys(object)) {
+ if (!(fixtureKey in expectedProperties)) {
+ extraProperties.push(fixtureKey);
+ }
+ }
+
+ if (extraProperties.length) {
+ // Some extra properties have been found.
+ this.report(
+ true,
+ object,
+ expectedProperties,
+ `These properties are present, but shouldn't: "${extraProperties.join(
+ '", "'
+ )}".`
+ );
+ }
+
+ // Now, let's carry on the rest of our work.
+ this.objectContains(object, expectedProperties);
+ },
+});
+
+const Expect = {
+ any: () => actual => {} /* We don't check anything more than the presence of this property. */,
+};
+
+/* These functions are part of the Assert object, and we want to reuse them. */
+[
+ "stringContains",
+ "stringMatches",
+ "objectContains",
+ "objectContainsOnly",
+].forEach(
+ assertChecker =>
+ (Expect[assertChecker] = expected => (actual, ...moreArgs) =>
+ Assert[assertChecker](actual, expected, ...moreArgs))
+);
+
+/* These functions will only check for the type. */
+[
+ "number",
+ "string",
+ "boolean",
+ "bigint",
+ "symbol",
+ "object",
+ "function",
+].forEach(type => (Expect[type] = makeTypeChecker(type)));
+
+function makeTypeChecker(type) {
+ return (...unexpectedArgs) => {
+ if (unexpectedArgs.length) {
+ throw new Error(
+ "Type checkers expectations aren't expecting any argument."
+ );
+ }
+ return (actual, message) => {
+ const isCorrect = typeof actual === type;
+ Assert.report(!isCorrect, actual, type, message, "has type");
+ };
+ };
+}
+/* ------ End of assertion helper ------ */
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