Revert 34040 - DevTools: make possible profiling of scripts doing heavy calcu...

webkit/glue/devtools/js/profiler_agent.js

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @fileoverview Provides communication interface to remote v8 profiler.
- */
-goog.provide('devtools.ProfilerAgent');
-
-/**
- * @constructor
- */
-devtools.ProfilerAgent = function() {
-  RemoteProfilerAgent.DidGetActiveProfilerModules =
-      goog.bind(this.didGetActiveProfilerModules_, this);
-  RemoteProfilerAgent.DidGetLogLines =
-      goog.bind(this.didGetLogLines_, this);
-
-  /**
-   * Active profiler modules flags.
-   * @type {number}
-   */
-  this.activeProfilerModules_ =
-      devtools.ProfilerAgent.ProfilerModules.PROFILER_MODULE_NONE;
-
-  /**
-   * Interval for polling profiler state.
-   * @type {number}
-   */
-  this.getActiveProfilerModulesInterval_ = null;
-
-  /**
-   * Profiler log position.
-   * @type {number}
-   */
-  this.logPosition_ = 0;
-
-  /**
-   * Whether log contents retrieval must be forced next time.
-   * @type {boolean}
-   */
-  this.forceGetLogLines_ = false;
-
-  /**
-   * Profiler processor instance.
-   * @type {devtools.profiler.Processor}
-   */
-  this.profilerProcessor_ = new devtools.profiler.Processor();
-};
-
-
-/**
- * A copy of enum from include/v8.h
- * @enum {number}
- */
-devtools.ProfilerAgent.ProfilerModules = {
-  PROFILER_MODULE_NONE: 0,
-  PROFILER_MODULE_CPU: 1,
-  PROFILER_MODULE_HEAP_STATS: 1 << 1,
-  PROFILER_MODULE_JS_CONSTRUCTORS: 1 << 2,
-  PROFILER_MODULE_HEAP_SNAPSHOT: 1 << 16
-};
-
-
-/**
- * Resets profiler agent to its initial state.
- */
-devtools.ProfilerAgent.prototype.reset = function() {
-  this.logPosition_ = 0;
-  this.activeProfilerModules_ =
-      devtools.ProfilerAgent.ProfilerModules.PROFILER_MODULE_NONE;
-};
-
-
-/**
- * Sets up callbacks that deal with profiles processing.
- */
-devtools.ProfilerAgent.prototype.setupProfilerProcessorCallbacks = function() {
-  // A temporary icon indicating that the profile is being processed.
-  var processingIcon = new WebInspector.SidebarTreeElement(
-      'profile-sidebar-tree-item',
-      WebInspector.UIString('Processing...'),
-      '', null, false);
-  var profilesSidebar = WebInspector.panels.profiles.getProfileType(
-      WebInspector.CPUProfileType.TypeId).treeElement;
-
-  this.profilerProcessor_.setCallbacks(
-      function onProfileProcessingStarted() {
-        // Set visually empty string. Subtitle hiding is done via styles
-        // manipulation which doesn't play well with dynamic append / removal.
-        processingIcon.subtitle = ' ';
-        profilesSidebar.appendChild(processingIcon);
-      },
-      function onProfileProcessingStatus(ticksCount) {
-        processingIcon.subtitle =
-            WebInspector.UIString('%d ticks processed', ticksCount);
-      },
-      function onProfileProcessingFinished(profile) {
-        profilesSidebar.removeChild(processingIcon);
-        profile.typeId = WebInspector.CPUProfileType.TypeId;
-        InspectorBackend.addFullProfile(profile);
-        WebInspector.addProfileHeader(profile);
-        // If no profile is currently shown, show the new one.
-        var profilesPanel = WebInspector.panels.profiles;
-        if (!profilesPanel.visibleView) {
-          profilesPanel.showProfile(profile);
-        }
-      }
-  );
-};
-
-
-/**
- * Initializes profiling state.
- */
-devtools.ProfilerAgent.prototype.initializeProfiling = function() {
-  this.setupProfilerProcessorCallbacks();
-  this.forceGetLogLines_ = true;
-  this.getActiveProfilerModulesInterval_ = setInterval(
-        function() { RemoteProfilerAgent.GetActiveProfilerModules(); }, 1000);
-};
-
-
-/**
- * Starts profiling.
- * @param {number} modules List of modules to enable.
- */
-devtools.ProfilerAgent.prototype.startProfiling = function(modules) {
-  var cmd = new devtools.DebugCommand('profile', {
-      'modules': modules,
-      'command': 'resume'});
-  devtools.DebuggerAgent.sendCommand_(cmd);
-  RemoteToolsAgent.ExecuteVoidJavaScript();
-  if (modules &
-      devtools.ProfilerAgent.ProfilerModules.PROFILER_MODULE_HEAP_SNAPSHOT) {
-    var pos = this.logPosition_;
-    // Active modules will not change, instead, a snapshot will be logged.
-    setTimeout(function() { RemoteProfilerAgent.GetLogLines(pos); }, 500);
-  }
-};
-
-
-/**
- * Stops profiling.
- */
-devtools.ProfilerAgent.prototype.stopProfiling = function(modules) {
-  var cmd = new devtools.DebugCommand('profile', {
-      'modules': modules,
-      'command': 'pause'});
-  devtools.DebuggerAgent.sendCommand_(cmd);
-  RemoteToolsAgent.ExecuteVoidJavaScript();
-};
-
-
-/**
- * Handles current profiler status.
- * @param {number} modules List of active (started) modules.
- */
-devtools.ProfilerAgent.prototype.didGetActiveProfilerModules_ = function(
-    modules) {
-  var profModules = devtools.ProfilerAgent.ProfilerModules;
-  var profModuleNone = profModules.PROFILER_MODULE_NONE;
-  if (this.forceGetLogLines_ ||
-      (modules != profModuleNone &&
-      this.activeProfilerModules_ == profModuleNone)) {
-    this.forceGetLogLines_ = false;
-    // Start to query log data.
-    RemoteProfilerAgent.GetLogLines(this.logPosition_);
-  }
-  this.activeProfilerModules_ = modules;
-  // Update buttons.
-  WebInspector.setRecordingProfile(modules & profModules.PROFILER_MODULE_CPU);
-};
-
-
-/**
- * Handles a portion of a profiler log retrieved by GetLogLines call.
- * @param {number} pos Current position in log.
- * @param {string} log A portion of profiler log.
- */
-devtools.ProfilerAgent.prototype.didGetLogLines_ = function(pos, log) {
-  this.logPosition_ = pos;
-  if (log.length > 0) {
-    this.profilerProcessor_.processLogChunk(log);
-  } else if (this.activeProfilerModules_ ==
-      devtools.ProfilerAgent.ProfilerModules.PROFILER_MODULE_NONE) {
-    // No new data and profiling is stopped---suspend log reading.
-    return;
-  }
-  setTimeout(function() { RemoteProfilerAgent.GetLogLines(pos); }, 500);
-};