SSL tracer.js Sprache: JAVA

/* 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/. */

"use strict";

const lazy = {};
ChromeUtils.defineESModuleGetters(
  lazy,
  {
    JSTracer: "resource://devtools/server/tracer/tracer.sys.mjs",
  },
  { global: "contextual" }
);

const { Actor } = require("resource://devtools/shared/protocol.js");
const { createValueGrip } = require("devtools/server/actors/object/utils");
const {
  ObjectActorPool,
} = require("resource://devtools/server/actors/object/ObjectActorPool.js");
const {
  tracerSpec,
  TRACER_LOG_METHODS,
} = require("resource://devtools/shared/specs/tracer.js");

loader.lazyRequireGetter(
  this,
  "StdoutTracingListener",
  "resource://devtools/server/actors/tracer/stdout.js",
  true
);
loader.lazyRequireGetter(
  this,
  "ResourcesTracingListener",
  "resource://devtools/server/actors/tracer/resources.js",
  true
);
loader.lazyRequireGetter(
  this,
  "ProfilerTracingListener",
  "resource://devtools/server/actors/tracer/profiler.js",
  true
);

// Indexes of each data type within the array describing a trace
exports.TRACER_FIELDS_INDEXES = {
  // This is shared with all the data types
  TYPE: 0,

  // Frame traces are slightly special and do not share any field with the other data types
  FRAME_IMPLEMENTATION: 1,
  FRAME_NAME: 2,
  FRAME_SOURCEID: 3,
  FRAME_LINE: 4,
  FRAME_COLUMN: 5,
  FRAME_URL: 6,

  // These fields are shared with all but frame data types
  PREFIX: 1,
  FRAME_INDEX: 2,
  TIMESTAMP: 3,
  DEPTH: 4,

  EVENT_NAME: 5,

  ENTER_ARGS: 5,
  ENTER_ARG_NAMES: 6,

  EXIT_PARENT_FRAME_ID: 5,
  EXIT_RETURNED_VALUE: 6,
  EXIT_WHY: 7,

  DOM_MUTATION_TYPE: 5,
  DOM_MUTATION_ELEMENT: 6,
};

const VALID_LOG_METHODS = Object.values(TRACER_LOG_METHODS);

class TracerActor extends Actor {
  constructor(conn, targetActor) {
    super(conn, tracerSpec);
    this.targetActor = targetActor;
  }

  // When the tracer is stopped, save the result of the Listener Class.
  // This is used by the profiler log method and the getProfile method.
  #stopResult = null;

  // A Pool for all JS values emitted by the Tracer Actor.
  // This helps instantiate a unique Object Actor per JS Object communicated to the client.
  // This also helps share the same Object Actor instances when evaluating JS via
  // the console actor.
  // This pool is created lazily, only once we start a new trace.
  // We also clear the pool before starting the trace.
  #tracerPool = null;

  destroy() {
    this.stopTracing();
  }

  getLogMethod() {
    return this.logMethod;
  }

  /**
   * Toggle tracing JavaScript.
   * Meant for the WebConsole command in order to pass advanced
   * configuration directly to JavaScriptTracer class.
   *
   * @param {Object} options
   *        Options used to configure JavaScriptTracer.
   *        See `JavaScriptTracer.startTracing`.
   * @return {Boolean}
   *         True if the tracer starts, or false if it was stopped.
   */
  toggleTracing(options) {
    if (!this.tracingListener) {
      this.startTracing(options);
      return true;
    }
    this.stopTracing();
    return false;
  }

  /**
   * Start tracing.
   *
   * @param {Object} options
   *        Options used to configure JavaScriptTracer.
   *        See `JavaScriptTracer.startTracing`.
   */
  // eslint-disable-next-line complexity
  startTracing(options = {}) {
    if (options.logMethod && !VALID_LOG_METHODS.includes(options.logMethod)) {
      throw new Error(
        `Invalid log method '${options.logMethod}'. Only supports: ${VALID_LOG_METHODS}`
      );
    }
    if (options.prefix && typeof options.prefix != "string") {
      throw new Error("Invalid prefix, only support string type");
    }
    if (options.maxDepth && typeof options.maxDepth != "number") {
      throw new Error("Invalid max-depth, only support numbers");
    }
    if (options.maxRecords && typeof options.maxRecords != "number") {
      throw new Error("Invalid max-records, only support numbers");
    }

    // When tracing on next user interaction is enabled,
    // disable logging from workers as this makes the tracer work
    // against visible documents and is actived per document thread.
    if (options.traceOnNextInteraction && isWorker) {
      return;
    }

    // Ignore WindowGlobal target actors for WindowGlobal of iframes running in the same process and thread as their parent document.
    // isProcessRoot will be true for each WindowGlobal being the top parent within a given process.
    // It will typically be true for WindowGlobal of iframe running in a distinct origin and process,
    // but only for the top iframe document. It will also be true for the top level tab document.
    if (
      this.targetActor.window &&
      !this.targetActor.window.windowGlobalChild?.isProcessRoot
    ) {
      return;
    }

    // Flush any previous recorded data only when we start a new tracer
    // as we may still analyse trace data after stopping the trace.
    // The pool will then be re-created on demand from createValueGrip.
    if (this.#tracerPool) {
      this.#tracerPool.destroy();
      this.#tracerPool = null;
    }

    this.logMethod = options.logMethod || TRACER_LOG_METHODS.STDOUT;

    let ListenerClass = null;
    // Currently only the profiler output is supported with the native tracer.
    let useNativeTracing = false;
    switch (this.logMethod) {
      case TRACER_LOG_METHODS.STDOUT:
        ListenerClass = StdoutTracingListener;
        break;
      case TRACER_LOG_METHODS.CONSOLE:
      case TRACER_LOG_METHODS.DEBUGGER_SIDEBAR:
        // Console and debugger sidebar are both using JSTRACE_STATE/JSTRACE_TRACE resources
        // to receive tracing data.
        ListenerClass = ResourcesTracingListener;
        break;
      case TRACER_LOG_METHODS.PROFILER:
        ListenerClass = ProfilerTracingListener;
        // Recording function returns is mandatory when recording profiler output.
        // Otherwise frames are not closed and mixed up in the profiler frontend.
        options.traceFunctionReturn = true;
        useNativeTracing = true;
        break;
    }
    this.tracingListener = new ListenerClass({
      targetActor: this.targetActor,
      traceValues: !!options.traceValues,
      traceActor: this,
    });
    lazy.JSTracer.addTracingListener(this.tracingListener);

    this.traceValues = !!options.traceValues;
    try {
      lazy.JSTracer.startTracing({
        global: this.targetActor.targetGlobal,
        prefix: options.prefix || "",
        // Enable receiving the `currentDOMEvent` being passed to `onTracingFrame`
        traceDOMEvents: true,
        // Enable tracing DOM Mutations
        traceDOMMutations: options.traceDOMMutations,
        // Enable tracing function arguments as well as returned values
        traceValues: !!options.traceValues,
        // Enable tracing only on next user interaction
        traceOnNextInteraction: !!options.traceOnNextInteraction,
        // Notify about frame exit / function call returning
        traceFunctionReturn: !!options.traceFunctionReturn,
        // Use the native tracing implementation
        useNativeTracing,
        // Ignore frames beyond the given depth
        maxDepth: options.maxDepth,
        // Stop the tracing after a number of top level frames
        maxRecords: options.maxRecords,
      });
    } catch (e) {
      // If startTracing throws, it probably rejected one of its options and we should
      // unregister the tracing listener.
      this.stopTracing();
      throw e;
    }
  }

  async stopTracing() {
    if (!this.tracingListener) {
      return;
    }
    // Remove before stopping to prevent receiving the stop notification
    lazy.JSTracer.removeTracingListener(this.tracingListener);
    // Save the result of the stop request for the profiler and the getProfile RDP method
    this.#stopResult = this.tracingListener.stop();
    this.tracingListener = null;

    lazy.JSTracer.stopTracing();
    this.logMethod = null;
  }

  /**
   * Queried by THREAD_STATE watcher to send the gecko profiler data
   * as part of THREAD STATE "stop" resource.
   *
   * @return {Object} Gecko profiler profile object.
   */
  async getProfile() {
    // #stopResult is a promise
    return this.#stopResult;
  }

  createValueGrip(value) {
    if (!this.#tracerPool) {
      this.#tracerPool = new ObjectActorPool(
        this.targetActor.threadActor,
        "tracer",
        true
      );
      this.manage(this.#tracerPool);
    }
    return createValueGrip(this, value, this.#tracerPool);
  }
}
exports.TracerActor = TracerActor;

quality95%

¤ Dauer der Verarbeitung: 0.16 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.