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"use strict";
/*
*********************************************************************************
* *
* WARNING *
* *
* If you adjust any of the constants here (slice limit, number of keys, etc.) *
* make sure to update the JSON schema at: *
* https://github.com/mozilla-services/mozilla-pipeline-schemas/blob/master/ *
* telemetry/main.schema.json *
* *
* Otherwise, pings may be dropped by the telemetry backend! *
* *
********************************************************************************/
const {GCTelemetry} = Cu.import("resource://gre/modules/GCTelemetry.jsm", {});
function check(entries) {
const FIELDS = ["random", "worst"];
// Check that all FIELDS are in |entries|.
for (let f of FIELDS) {
ok(f in entries, `${f} found in entries`);
}
// Check that only FIELDS are in |entries|.
for (let k of Object.keys(entries)) {
ok(FIELDS.includes(k), `${k} found in FIELDS`);
}
let foundGCs = 0;
for (let f of FIELDS) {
ok(Array.isArray(entries[f]), "have an array of GCs");
ok(entries[f].length <= 2, "not too many GCs");
for (let gc of entries[f]) {
ok(gc !== null, "GC is non-null");
foundGCs++;
ok(Object.keys(gc).length <= 25, "number of keys in GC is not too large");
// Sanity check the GC data.
ok("total_time" in gc, "total_time field present");
ok("max_pause" in gc, "max_pause field present");
ok("slices" in gc, "slices field present");
ok(Array.isArray(gc.slices), "slices is an array");
ok(gc.slices.length > 0, "slices array non-empty");
ok(gc.slices.length <= 4, "slices array is not too long");
ok("totals" in gc, "totals field present");
ok(typeof(gc.totals) == "object", "totals is an object");
ok(Object.keys(gc.totals).length <= 65, "totals array is not too long");
// Make sure we don't skip any big objects.
for (let key in gc) {
if (key != "slices" && key != "totals") {
ok(typeof(gc[key]) != "object", `${key} property should be primitive`);
}
}
let phases = new Set();
for (let slice of gc.slices) {
ok(Object.keys(slice).length <= 15, "slice is not too large");
ok("pause" in slice, "pause field present in slice");
ok("reason" in slice, "reason field present in slice");
ok("times" in slice, "times field present in slice");
// Make sure we don't skip any big objects.
for (let key in slice) {
if (key != "times") {
ok(typeof(slice[key]) != "object", `${key} property should be primitive`);
}
}
ok(Object.keys(slice.times).length <= 65, "no more than 65 phases");
for (let phase in slice.times) {
phases.add(phase);
ok(typeof(slice.times[phase]) == "number", `${phase} property should be a number`);
}
}
let totals = gc.totals;
// Make sure we don't skip any big objects.
for (let phase in totals) {
ok(typeof(totals[phase]) == "number", `${phase} property should be a number`);
}
for (let phase of phases) {
ok(phase in totals, `${phase} is in totals`);
}
}
}
ok(foundGCs > 0, "saw at least one GC");
}
add_task(function* test() {
let multiprocess = Services.appinfo.browserTabsRemoteAutostart;
// Set these prefs to ensure that we get measurements.
const prefs = {"set": [["javascript.options.mem.notify", true]]};
yield new Promise(resolve => SpecialPowers.pushPrefEnv(prefs, resolve));
function runRemote(f) {
gBrowser.selectedBrowser.messageManager.loadFrameScript(`data:,(${f})()`, false);
}
function initScript() {
const {GCTelemetry} = Components.utils.import("resource://gre/modules/GCTelemetry.jsm", {});
/*
* Don't shut down GC telemetry if it was already running before the test!
* Note: We need to use a multiline comment here since this code is turned into a data: URI.
*/
let shutdown = GCTelemetry.init();
function listener() {
removeMessageListener("GCTelemTest:Shutdown", listener);
if (shutdown) {
GCTelemetry.shutdown();
}
}
addMessageListener("GCTelemTest:Shutdown", listener);
}
if (multiprocess) {
runRemote(initScript);
}
// Don't shut down GC telemetry if it was already running before the test!
let shutdown = GCTelemetry.init();
registerCleanupFunction(() => {
if (shutdown) {
GCTelemetry.shutdown();
}
gBrowser.selectedBrowser.messageManager.sendAsyncMessage("GCTelemTest:Shutdown");
});
let localPromise = new Promise(resolve => {
function obs() {
Services.obs.removeObserver(obs, "garbage-collection-statistics");
resolve();
}
Services.obs.addObserver(obs, "garbage-collection-statistics", false);
});
let remotePromise;
if (multiprocess) {
remotePromise = new Promise(resolve => {
function obs() {
Services.ppmm.removeMessageListener("Telemetry:GCStatistics", obs);
resolve();
}
Services.ppmm.addMessageListener("Telemetry:GCStatistics", obs);
});
} else {
remotePromise = Promise.resolve();
}
// Make sure we have a GC to work with in both processes.
Cu.forceGC();
if (multiprocess) {
runRemote(() => Components.utils.forceGC());
}
info("Waiting for GCs");
yield Promise.all([localPromise, remotePromise]);
let localEntries = GCTelemetry.entries("main", true);
let remoteEntries = multiprocess ? GCTelemetry.entries("content", true) : localEntries;
check(localEntries);
check(remoteEntries);
localEntries = GCTelemetry.entries("main", false);
remoteEntries = multiprocess ? GCTelemetry.entries("content", false) : localEntries;
is(localEntries.random.length, 0, "no random GCs after reset");
is(localEntries.worst.length, 0, "no worst GCs after reset");
is(remoteEntries.random.length, 0, "no random GCs after reset");
is(remoteEntries.worst.length, 0, "no worst GCs after reset");
});
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