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Copyright 2022 The Chromium Authors. All rights reserved.\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n\nimport * as Platform from '../../../core/platform/platform.js';\nimport * as Helpers from '../helpers/helpers.js';\nimport * as Types from '../types/types.js';\n\nimport {data as auctionWorkletsData} from './AuctionWorkletsHandler.js';\nimport * as HandlerHelpers from './helpers.js';\nimport {data as metaHandlerData, type FrameProcessData} from './MetaHandler.js';\nimport {data as networkRequestHandlerData} from './NetworkRequestsHandler.js';\nimport {data as samplesHandlerData} from './SamplesHandler.js';\nimport type {HandlerName} from './types.js';\n\n/**\n * This handler builds the hierarchy of trace events and profile calls\n * on each thread on each process.\n *\n * Throughout the code, trace events and profile calls are referred to\n * as \"entries\", but note they are different types of data. Trace events\n * come directly from the backend and it's the type the engine commonly\n * refers to. Profile calls on the other hand are built in the frontend,\n * and, for compatibility purposes, typed as an extension to the trace\n * event type.\n */\n\nconst processes = new Map();\n\nlet entityMappings: HandlerHelpers.EntityMappings = {\n eventsByEntity: new Map(),\n entityByEvent: new Map(),\n createdEntityCache: new Map(),\n};\n\n// We track the compositor tile worker thread name events so that at the end we\n// can return these keyed by the process ID. These are used in the frontend to\n// show the user the rasterization thread(s) on the main frame as tracks.\nconst compositorTileWorkers = Array<{\n pid: Types.Events.ProcessID,\n tid: Types.Events.ThreadID,\n}>();\nconst entryToNode = new Map();\nlet allTraceEntries: Types.Events.Event[] = [];\n\nconst completeEventStack: (Types.Events.SyntheticComplete)[] = [];\n\nlet config: Types.Configuration.Configuration = Types.Configuration.defaults();\n\nconst makeRendererProcess = (): RendererProcess => ({\n url: null,\n isOnMainFrame: false,\n threads: new Map(),\n});\n\nconst makeRendererThread = (): RendererThread => ({\n name: null,\n entries: [],\n profileCalls: [],\n layoutEvents: [],\n updateLayoutTreeEvents: [],\n});\n\nconst getOrCreateRendererProcess =\n (processes: Map, pid: Types.Events.ProcessID): RendererProcess => {\n return Platform.MapUtilities.getWithDefault(processes, pid, makeRendererProcess);\n };\n\nconst getOrCreateRendererThread = (process: RendererProcess, tid: Types.Events.ThreadID): RendererThread => {\n return Platform.MapUtilities.getWithDefault(process.threads, tid, makeRendererThread);\n};\n\nexport function handleUserConfig(userConfig: Types.Configuration.Configuration): void {\n config = userConfig;\n}\n\nexport function reset(): void {\n processes.clear();\n entryToNode.clear();\n entityMappings.eventsByEntity.clear();\n entityMappings.entityByEvent.clear();\n entityMappings.createdEntityCache.clear();\n allTraceEntries.length = 0;\n completeEventStack.length = 0;\n compositorTileWorkers.length = 0;\n}\n\nexport function handleEvent(event: Types.Events.Event): void {\n if (Types.Events.isThreadName(event) && event.args.name?.startsWith('CompositorTileWorker')) {\n compositorTileWorkers.push({\n pid: event.pid,\n tid: event.tid,\n });\n }\n\n if (Types.Events.isBegin(event) || Types.Events.isEnd(event)) {\n const process = getOrCreateRendererProcess(processes, event.pid);\n const thread = getOrCreateRendererThread(process, event.tid);\n const completeEvent = makeCompleteEvent(event);\n if (!completeEvent) {\n return;\n }\n thread.entries.push(completeEvent);\n allTraceEntries.push(completeEvent);\n return;\n }\n\n if (Types.Events.isInstant(event) || Types.Events.isComplete(event)) {\n const process = getOrCreateRendererProcess(processes, event.pid);\n const thread = getOrCreateRendererThread(process, event.tid);\n thread.entries.push(event);\n allTraceEntries.push(event);\n }\n\n if (Types.Events.isLayout(event)) {\n const process = getOrCreateRendererProcess(processes, event.pid);\n const thread = getOrCreateRendererThread(process, event.tid);\n thread.layoutEvents.push(event);\n }\n\n if (Types.Events.isUpdateLayoutTree(event)) {\n const process = getOrCreateRendererProcess(processes, event.pid);\n const thread = getOrCreateRendererThread(process, event.tid);\n thread.updateLayoutTreeEvents.push(event);\n }\n}\n\nexport async function finalize(): Promise {\n const {mainFrameId, rendererProcessesByFrame, threadsInProcess} = metaHandlerData();\n entityMappings = networkRequestHandlerData().entityMappings;\n\n assignMeta(processes, mainFrameId, rendererProcessesByFrame, threadsInProcess);\n sanitizeProcesses(processes);\n buildHierarchy(processes);\n sanitizeThreads(processes);\n Helpers.Trace.sortTraceEventsInPlace(allTraceEntries);\n}\n\nexport function data(): RendererHandlerData {\n return {\n processes: new Map(processes),\n compositorTileWorkers: new Map(gatherCompositorThreads()),\n entryToNode: new Map(entryToNode),\n allTraceEntries: [...allTraceEntries],\n entityMappings: {\n entityByEvent: new Map(entityMappings.entityByEvent),\n eventsByEntity: new Map(entityMappings.eventsByEntity),\n createdEntityCache: new Map(entityMappings.createdEntityCache),\n },\n };\n}\n\nfunction gatherCompositorThreads(): Map {\n const threadsByProcess = new Map();\n for (const worker of compositorTileWorkers) {\n const byProcess = threadsByProcess.get(worker.pid) || [];\n byProcess.push(worker.tid);\n threadsByProcess.set(worker.pid, byProcess);\n }\n return threadsByProcess;\n}\n\n/**\n * Steps through all the renderer processes we've located so far in the meta\n * handler, obtaining their URL, checking whether they are the main frame, and\n * collecting each one of their threads' name. This meta handler's data is\n * assigned to the renderer handler's data.\n */\nexport function assignMeta(\n processes: Map, mainFrameId: string,\n rendererProcessesByFrame: FrameProcessData,\n threadsInProcess: Map>): void {\n assignOrigin(processes, rendererProcessesByFrame);\n assignIsMainFrame(processes, mainFrameId, rendererProcessesByFrame);\n assignThreadName(processes, threadsInProcess);\n}\n\n/**\n * Assigns origins to all threads in all processes.\n * @see assignMeta\n */\nexport function assignOrigin(\n processes: Map, rendererProcessesByFrame: FrameProcessData): void {\n for (const renderProcessesByPid of rendererProcessesByFrame.values()) {\n for (const [pid, processWindows] of renderProcessesByPid) {\n for (const processInfo of processWindows.flat()) {\n const process = getOrCreateRendererProcess(processes, pid);\n // Sometimes a single process is responsible with rendering multiple\n // frames at the same time. For example, see https://crbug.com/1334563.\n // When this happens, we'd still like to assign a single url per process\n // so: 1) use the first frame rendered by this process as the url source\n // and 2) if the last url is \"about:blank\", use the next frame's url,\n // data from about:blank is irrelevant.\n if (process.url === null || process.url === 'about:blank') {\n // If we are here, it's because we care about this process and the URL. But before we store\n // it, we check if it is a valid URL by trying to create a URL object. If it isn't, we won't\n // set it, and this process will be filtered out later.\n try {\n new URL(processInfo.frame.url);\n process.url = processInfo.frame.url;\n } catch {\n process.url = null;\n }\n }\n }\n }\n }\n}\n\n/**\n * Assigns whether or not a thread is the main frame to all threads in all processes.\n * @see assignMeta\n */\nexport function assignIsMainFrame(\n processes: Map, mainFrameId: string,\n rendererProcessesByFrame: FrameProcessData): void {\n for (const [frameId, renderProcessesByPid] of rendererProcessesByFrame) {\n for (const [pid] of renderProcessesByPid) {\n const process = getOrCreateRendererProcess(processes, pid);\n // We have this go in one direction; once a renderer has been flagged as\n // being on the main frame, we don't unset it to false if were to show up\n // in a subframe. Equally, if we already saw this renderer in a subframe,\n // but it becomes the main frame, the flag would get updated.\n if (frameId === mainFrameId) {\n process.isOnMainFrame = true;\n }\n }\n }\n}\n\n/**\n * Assigns the thread name to all threads in all processes.\n * @see assignMeta\n */\nexport function assignThreadName(\n processes: Map,\n threadsInProcess: Map>): void {\n for (const [pid, process] of processes) {\n for (const [tid, threadInfo] of threadsInProcess.get(pid) ?? []) {\n const thread = getOrCreateRendererThread(process, tid);\n thread.name = threadInfo?.args.name ?? `${tid}`;\n }\n }\n}\n\n/**\n * Removes unneeded trace data opportunistically stored while handling events.\n * This currently does the following:\n * - Deletes processes with an unknown origin.\n */\nexport function sanitizeProcesses(processes: Map): void {\n const auctionWorklets = auctionWorkletsData().worklets;\n const metaData = metaHandlerData();\n if (metaData.traceIsGeneric) {\n return;\n }\n for (const [pid, process] of processes) {\n // If the process had no url, or if it had a malformed url that could not be\n // parsed for some reason, or if it's an \"about:\" origin, delete it.\n // This is done because we don't really care about processes for which we\n // can't provide actionable insights to the user (e.g. about:blank pages).\n //\n // There is one exception; AuctionWorklet processes get parsed in a\n // separate handler, so at this point we check to see if the process has\n // been found by the AuctionWorkletsHandler, and if so we update the URL.\n // This ensures that we keep this process around and do not drop it due to\n // the lack of a URL.\n if (process.url === null) {\n const maybeWorklet = auctionWorklets.get(pid);\n if (maybeWorklet) {\n process.url = maybeWorklet.host;\n } else {\n processes.delete(pid);\n }\n continue;\n }\n }\n}\n\n/**\n * Removes unneeded trace data opportunistically stored while handling events.\n * This currently does the following:\n * - Deletes threads with no roots.\n */\nexport function sanitizeThreads(processes: Map): void {\n for (const [, process] of processes) {\n for (const [tid, thread] of process.threads) {\n // If the thread has no roots, delete it. Otherwise, there's going to\n // be space taken, even though nothing is rendered in the track manager.\n if (!thread.tree?.roots.size) {\n process.threads.delete(tid);\n }\n }\n }\n}\n\n/**\n * Creates a hierarchical structure from the trace events. Each thread in each\n * process will contribute to their own individual hierarchy.\n *\n * The trace data comes in as a contiguous array of events, against which we\n * make a couple of assumptions:\n *\n * 1. Events are temporally-ordered in terms of start time (though they're\n * not necessarily ordered as such in the data stream).\n * 2. If event B's start and end times are within event A's time boundaries\n * we assume that A is the parent of B.\n *\n * Therefore we expect to reformulate something like:\n *\n * [ Task A ][ Task B ][ Task C ][ Task D ][ Task E ]\n *\n * Into something hierarchically-arranged like below:\n *\n * |------------- Task A -------------||-- Task E --|\n * |-- Task B --||-- Task D --|\n * |- Task C -|\n */\nexport function buildHierarchy(\n processes: Map,\n options?: {filter: {has: (name: Types.Events.Name) => boolean}}): void {\n const samplesData = samplesHandlerData();\n for (const [pid, process] of processes) {\n for (const [tid, thread] of process.threads) {\n if (!thread.entries.length) {\n thread.tree = Helpers.TreeHelpers.makeEmptyTraceEntryTree();\n continue;\n }\n // Step 1. Massage the data.\n Helpers.Trace.sortTraceEventsInPlace(thread.entries);\n // Step 2. Inject profile calls from samples\n const samplesDataForThread = samplesData.profilesInProcess.get(pid)?.get(tid);\n if (samplesDataForThread) {\n const cpuProfile = samplesDataForThread.parsedProfile;\n const samplesIntegrator = cpuProfile &&\n new Helpers.SamplesIntegrator.SamplesIntegrator(\n cpuProfile, samplesDataForThread.profileId, pid, tid, config);\n const profileCalls = samplesIntegrator?.buildProfileCalls(thread.entries);\n if (samplesIntegrator && profileCalls) {\n allTraceEntries = [...allTraceEntries, ...profileCalls];\n thread.entries = Helpers.Trace.mergeEventsInOrder(thread.entries, profileCalls);\n thread.profileCalls = profileCalls;\n // We'll also inject the instant JSSample events (in debug mode only)\n const jsSamples = samplesIntegrator.jsSampleEvents;\n if (jsSamples) {\n allTraceEntries = [...allTraceEntries, ...jsSamples];\n thread.entries = Helpers.Trace.mergeEventsInOrder(thread.entries, jsSamples);\n }\n }\n }\n // Step 3. Build the tree.\n const treeData = Helpers.TreeHelpers.treify(thread.entries, options);\n thread.tree = treeData.tree;\n // Update the entryToNode map with the entries from this thread\n for (const [entry, node] of treeData.entryToNode) {\n entryToNode.set(entry, node);\n // Entity mapping is unrelated to the tree, but calling here as we need to call on every node anyway.\n HandlerHelpers.addEventToEntityMapping(entry, entityMappings);\n }\n }\n }\n}\n\nexport function makeCompleteEvent(event: Types.Events.Begin|Types.Events.End): Types.Events.SyntheticComplete|null {\n if (Types.Events.isEnd(event)) {\n // Quietly ignore unbalanced close events, they're legit (we could\n // have missed start one).\n const beginEvent = completeEventStack.pop();\n if (!beginEvent) {\n return null;\n }\n if (beginEvent.name !== event.name || beginEvent.cat !== event.cat) {\n console.error(\n 'Begin/End events mismatch at ' + beginEvent.ts + ' (' + beginEvent.name + ') vs. ' + event.ts + ' (' +\n event.name + ')');\n return null;\n }\n // Update the begin event's duration using the timestamp of the end\n // event.\n beginEvent.dur = Types.Timing.Micro(event.ts - beginEvent.ts);\n return null;\n }\n\n // Create a synthetic event using the begin event, when we find the\n // matching end event later we will update its duration.\n const syntheticComplete: Types.Events.SyntheticComplete = {\n ...event,\n ph: Types.Events.Phase.COMPLETE,\n dur: Types.Timing.Micro(0),\n };\n\n completeEventStack.push(syntheticComplete);\n return syntheticComplete;\n}\n\nexport function deps(): HandlerName[] {\n return ['Meta', 'Samples', 'AuctionWorklets', 'NetworkRequests'];\n}\n\nexport interface RendererHandlerData {\n processes: Map;\n /**\n * A map of all compositor workers (which we show in the UI as Rasterizers)\n * by the process ID.\n */\n compositorTileWorkers: Map;\n entryToNode: Map;\n /**\n * All trace events and synthetic profile calls made from\n * samples.\n */\n allTraceEntries: Types.Events.Event[];\n entityMappings: HandlerHelpers.EntityMappings;\n}\n\nexport interface RendererProcess {\n // In an ideal world this would be modelled as a URL, but URLs cannot be sent\n // between the main thread and workers, so we have to store it as a string.\n url: string|null;\n isOnMainFrame: boolean;\n threads: Map;\n}\n\nexport interface RendererThread {\n name: string|null;\n /**\n * Contains trace events and synthetic profile calls made from\n * samples.\n */\n entries: Types.Events.Event[];\n profileCalls: Types.Events.SyntheticProfileCall[];\n layoutEvents: Types.Events.Layout[];\n updateLayoutTreeEvents: Types.Events.UpdateLayoutTree[];\n tree?: Helpers.TreeHelpers.TraceEntryTree;\n}\n"]}