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

webkit/glue/devtools/js/debugger_agent.js

Index: webkit/glue/devtools/js/debugger_agent.js
===================================================================
--- webkit/glue/devtools/js/debugger_agent.js	(revision 34040)
+++ webkit/glue/devtools/js/debugger_agent.js	(working copy)
@@ -17,6 +17,10 @@
       goog.bind(this.handleDebuggerOutput_, this);
   RemoteDebuggerAgent.SetContextId =
       goog.bind(this.setContextId_, this);
+  RemoteDebuggerAgent.DidGetActiveProfilerModules =
+      goog.bind(this.didGetActiveProfilerModules_, this);
+  RemoteDebuggerAgent.DidGetNextLogLines =
+      goog.bind(this.didGetNextLogLines_, this);
 
   /**
    * Id of the inspected page global context. It is used for filtering scripts.
@@ -86,6 +90,31 @@
   this.pendingBacktraceResponseHandler_ = null;
 
   /**
+   * Active profiler modules flags.
+   * @type {number}
+   */
+  this.activeProfilerModules_ =
+      devtools.DebuggerAgent.ProfilerModules.PROFILER_MODULE_NONE;
+
+  /**
+   * Interval for polling profiler state.
+   * @type {number}
+   */
+  this.getActiveProfilerModulesInterval_ = null;
+
+  /**
+   * 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();
+
+  /**
    * Container of all breakpoints set using resource URL. These breakpoints
    * survive page reload. Breakpoints set by script id(for scripts that don't
    * have URLs) are stored in ScriptInfo objects.
@@ -116,6 +145,19 @@
 
 
 /**
+ * A copy of enum from include/v8.h
+ * @enum {number}
+ */
+devtools.DebuggerAgent.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 debugger agent to its initial state.
  */
 devtools.DebuggerAgent.prototype.reset = function() {
@@ -129,6 +171,10 @@
   this.requestNumberToBreakpointInfo_ = {};
   this.callFrames_ = [];
   this.requestSeqToCallback_ = {};
+
+  // Profiler isn't reset because it contains no data that is
+  // specific for a particular V8 instance. All such data is
+  // managed by an agent on the Render's side.
 };
 
 
@@ -622,6 +668,77 @@
 
 
 /**
+ * Sets up callbacks that deal with profiles processing.
+ */
+devtools.DebuggerAgent.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.DebuggerAgent.prototype.initializeProfiling = function() {
+  this.setupProfilerProcessorCallbacks();
+  this.forceGetLogLines_ = true;
+  this.getActiveProfilerModulesInterval_ = setInterval(
+        function() { RemoteDebuggerAgent.GetActiveProfilerModules(); }, 1000);
+};
+
+
+/**
+ * Starts profiling.
+ * @param {number} modules List of modules to enable.
+ */
+devtools.DebuggerAgent.prototype.startProfiling = function(modules) {
+  RemoteDebuggerAgent.StartProfiling(modules);
+  if (modules &
+      devtools.DebuggerAgent.ProfilerModules.PROFILER_MODULE_HEAP_SNAPSHOT) {
+    // Active modules will not change, instead, a snapshot will be logged.
+    RemoteDebuggerAgent.GetNextLogLines();
+  }
+};
+
+
+/**
+ * Stops profiling.
+ */
+devtools.DebuggerAgent.prototype.stopProfiling = function(modules) {
+  RemoteDebuggerAgent.StopProfiling(modules);
+};
+
+
+/**
  * @param{number} scriptId
  * @return {string} Type of the context of the script with specified id.
  */
@@ -924,6 +1041,43 @@
 
 
 /**
+ * Handles current profiler status.
+ * @param {number} modules List of active (started) modules.
+ */
+devtools.DebuggerAgent.prototype.didGetActiveProfilerModules_ = function(
+    modules) {
+  var profModules = devtools.DebuggerAgent.ProfilerModules;
+  var profModuleNone = profModules.PROFILER_MODULE_NONE;
+  if (this.forceGetLogLines_ ||
+      (modules != profModuleNone &&
+      this.activeProfilerModules_ == profModuleNone)) {
+    this.forceGetLogLines_ = false;
+    // Start to query log data.
+    RemoteDebuggerAgent.GetNextLogLines();
+  }
+  this.activeProfilerModules_ = modules;
+  // Update buttons.
+  WebInspector.setRecordingProfile(modules & profModules.PROFILER_MODULE_CPU);
+};
+
+
+/**
+ * Handles a portion of a profiler log retrieved by GetNextLogLines call.
+ * @param {string} log A portion of profiler log.
+ */
+devtools.DebuggerAgent.prototype.didGetNextLogLines_ = function(log) {
+  if (log.length > 0) {
+    this.profilerProcessor_.processLogChunk(log);
+  } else if (this.activeProfilerModules_ ==
+      devtools.DebuggerAgent.ProfilerModules.PROFILER_MODULE_NONE) {
+    // No new data and profiling is stopped---suspend log reading.
+    return;
+  }
+  setTimeout(function() { RemoteDebuggerAgent.GetNextLogLines(); }, 500);
+};
+
+
+/**
  * Adds the script info to the local cache. This method assumes that the script
  * is not in the cache yet.
  * @param {Object} script Script json object from the debugger message.