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// 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 Profiler processor is used to process log file produced
* by V8 and produce an internal profile representation which is used
* for building profile views in 'Profiles' tab.
*/
goog.provide('devtools.profiler.Processor');
/**
* Ancestor of a profile object that leaves out only JS-related functions.
* @constructor
*/
devtools.profiler.JsProfile = function() {
devtools.profiler.Profile.call(this);
};
goog.inherits(devtools.profiler.JsProfile, devtools.profiler.Profile);
/**
* @type {RegExp}
*/
devtools.profiler.JsProfile.JS_FUNC_RE = /^(LazyCompile|Function|Script):/;
/**
* @override
*/
devtools.profiler.JsProfile.prototype.skipThisFunction = function(name) {
return !devtools.profiler.JsProfile.JS_FUNC_RE.test(name);
};
/**
* Profiler processor. Consumes profiler log and builds profile views.
*
* @param {function(devtools.profiler.ProfileView)} newProfileCallback Callback
* that receives a new processed profile.
* @constructor
*/
devtools.profiler.Processor = function(newProfileCallback) {
/**
*
*/
this.newProfileCallback_ = newProfileCallback;
/**
* Profiles array.
* @type {Array<devtools.profiler.JsProfile>}
*/
this.profiles_ = [];
/**
* The current profile.
* @type {devtools.profiler.JsProfile}
*/
this.currentProfile_ = null;
/**
* Builder of profile views.
* @type {devtools.profiler.ViewBuilder}
*/
this.viewBuilder_ = new devtools.profiler.ViewBuilder(1);
/**
* Next profile id.
* @type {number}
*/
this.profileId_ = 1;
};
/**
* A dispatch table for V8 profiler event log records.
* @private
*/
devtools.profiler.Processor.RecordsDispatch_ = {
'code-creation': { parsers: [null, parseInt, parseInt, null],
processor: 'processCodeCreation_', needsProfile: true },
'code-move': { parsers: [parseInt, parseInt],
processor: 'processCodeMove_', needsProfile: true },
'code-delete': { parsers: [parseInt],
processor: 'processCodeDelete_', needsProfile: true },
'tick': { parsers: [parseInt, parseInt, parseInt, 'var-args'],
processor: 'processTick_', needsProfile: true },
'profiler': { parsers: [null], processor: 'processProfiler_',
needsProfile: false },
// Not used in DevTools Profiler.
'shared-library': null,
// Obsolete row types.
'code-allocate': null,
'begin-code-region': null,
'end-code-region': null
};
/**
* Processes a portion of V8 profiler event log.
*
* @param {string} chunk A portion of log.
*/
devtools.profiler.Processor.prototype.processLogChunk = function(chunk) {
this.processLog_(chunk.split('\n'));
};
/**
* Processes a log lines.
*
* @param {Array<string>} lines Log lines.
* @private
*/
devtools.profiler.Processor.prototype.processLog_ = function(lines) {
var csvParser = new devtools.profiler.CsvParser();
try {
for (var i = 0, n = lines.length; i < n; ++i) {
var line = lines[i];
if (!line) {
continue;
}
var fields = csvParser.parseLine(line);
this.dispatchLogRow_(fields);
}
} catch (e) {
debugPrint('line ' + (i + 1) + ': ' + (e.message || e));
throw e;
}
};
/**
* Does a dispatch of a log record.
*
* @param {Array<string>} fields Log record.
* @private
*/
devtools.profiler.Processor.prototype.dispatchLogRow_ = function(fields) {
// Obtain the dispatch.
var command = fields[0];
if (!(command in devtools.profiler.Processor.RecordsDispatch_)) {
throw new Error('unknown command: ' + command);
}
var dispatch = devtools.profiler.Processor.RecordsDispatch_[command];
if (dispatch === null ||
(dispatch.needsProfile && this.currentProfile_ == null)) {
return;
}
// Parse fields.
var parsedFields = [];
for (var i = 0; i < dispatch.parsers.length; ++i) {
var parser = dispatch.parsers[i];
if (parser === null) {
parsedFields.push(fields[1 + i]);
} else if (typeof parser == 'function') {
parsedFields.push(parser(fields[1 + i]));
} else {
// var-args
parsedFields.push(fields.slice(1 + i));
break;
}
}
// Run the processor.
this[dispatch.processor].apply(this, parsedFields);
};
devtools.profiler.Processor.prototype.processProfiler_ = function(state) {
switch (state) {
case "resume":
this.currentProfile_ = new devtools.profiler.JsProfile();
this.profiles_.push(this.currentProfile_);
break;
case "pause":
if (this.currentProfile_ != null) {
this.newProfileCallback_(this.createProfileForView());
this.currentProfile_ = null;
}
break;
// These events are valid but are not used.
case "begin": break;
case "end": break;
default:
throw new Error("unknown profiler state: " + state);
}
};
devtools.profiler.Processor.prototype.processCodeCreation_ = function(
type, start, size, name) {
this.currentProfile_.addCode(type, name, start, size);
};
devtools.profiler.Processor.prototype.processCodeMove_ = function(from, to) {
this.currentProfile_.moveCode(from, to);
};
devtools.profiler.Processor.prototype.processCodeDelete_ = function(start) {
this.currentProfile_.deleteCode(start);
};
devtools.profiler.Processor.prototype.processTick_ = function(
pc, sp, vmState, stack) {
var fullStack = [pc];
for (var i = 0, n = stack.length; i < n; ++i) {
var frame = stack[i];
// Leave only numbers starting with 0x. Filter possible 'overflow' string.
if (frame.charAt(0) == '0') {
fullStack.push(parseInt(frame, 16));
}
}
this.currentProfile_.recordTick(fullStack);
};
/**
* Creates a profile for further displaying in ProfileView.
*/
devtools.profiler.Processor.prototype.createProfileForView = function() {
var profile = new devtools.profiler.ProfileView();
profile.uid = this.profileId_++;
profile.title = UserInitiatedProfileName + '.' + profile.uid;
// A trick to cope with ProfileView.bottomUpProfileDataGridTree and
// ProfileView.topDownProfileDataGridTree behavior.
profile.head = profile;
profile.heavyProfile = this.viewBuilder_.buildView(
this.currentProfile_.getBottomUpProfile(), true);
profile.treeProfile = this.viewBuilder_.buildView(
this.currentProfile_.getTopDownProfile());
return profile;
};
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