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// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/**
* Creates a Profile View builder object.
*
* @param {number} samplingRate Number of ms between profiler ticks.
* @constructor
*/
function ViewBuilder(samplingRate) {
this.samplingRate = samplingRate;
};
/**
* Builds a profile view for the specified call tree.
*
* @param {CallTree} callTree A call tree.
* @param {boolean} opt_bottomUpViewWeights Whether remapping
* of self weights for a bottom up view is needed.
*/
ViewBuilder.prototype.buildView = function(
callTree, opt_bottomUpViewWeights) {
var head;
var samplingRate = this.samplingRate;
var createViewNode = this.createViewNode;
callTree.traverse(function(node, viewParent) {
var totalWeight = node.totalWeight * samplingRate;
var selfWeight = node.selfWeight * samplingRate;
if (opt_bottomUpViewWeights === true) {
if (viewParent === head) {
selfWeight = totalWeight;
} else {
selfWeight = 0;
}
}
var viewNode = createViewNode(node.label, totalWeight, selfWeight, head);
if (viewParent) {
viewParent.addChild(viewNode);
} else {
head = viewNode;
}
return viewNode;
});
var view = this.createView(head);
return view;
};
/**
* Factory method for a profile view.
*
* @param {ProfileView.Node} head View head node.
* @return {ProfileView} Profile view.
*/
ViewBuilder.prototype.createView = function(head) {
return new ProfileView(head);
};
/**
* Factory method for a profile view node.
*
* @param {string} internalFuncName A fully qualified function name.
* @param {number} totalTime Amount of time that application spent in the
* corresponding function and its descendants (not that depending on
* profile they can be either callees or callers.)
* @param {number} selfTime Amount of time that application spent in the
* corresponding function only.
* @param {ProfileView.Node} head Profile view head.
* @return {ProfileView.Node} Profile view node.
*/
ViewBuilder.prototype.createViewNode = function(
funcName, totalTime, selfTime, head) {
return new ProfileView.Node(
funcName, totalTime, selfTime, head);
};
/**
* Creates a Profile View object. It allows to perform sorting
* and filtering actions on the profile.
*
* @param {ProfileView.Node} head Head (root) node.
* @constructor
*/
function ProfileView(head) {
this.head = head;
};
/**
* Sorts the profile view using the specified sort function.
*
* @param {function(ProfileView.Node,
* ProfileView.Node):number} sortFunc A sorting
* functions. Must comply with Array.sort sorting function requirements.
*/
ProfileView.prototype.sort = function(sortFunc) {
this.traverse(function (node) {
node.sortChildren(sortFunc);
});
};
/**
* Traverses profile view nodes in preorder.
*
* @param {function(ProfileView.Node)} f Visitor function.
*/
ProfileView.prototype.traverse = function(f) {
var nodesToTraverse = new ConsArray();
nodesToTraverse.concat([this.head]);
while (!nodesToTraverse.atEnd()) {
var node = nodesToTraverse.next();
f(node);
nodesToTraverse.concat(node.children);
}
};
/**
* Constructs a Profile View node object. Each node object corresponds to
* a function call.
*
* @param {string} internalFuncName A fully qualified function name.
* @param {number} totalTime Amount of time that application spent in the
* corresponding function and its descendants (not that depending on
* profile they can be either callees or callers.)
* @param {number} selfTime Amount of time that application spent in the
* corresponding function only.
* @param {ProfileView.Node} head Profile view head.
* @constructor
*/
ProfileView.Node = function(
internalFuncName, totalTime, selfTime, head) {
this.internalFuncName = internalFuncName;
this.totalTime = totalTime;
this.selfTime = selfTime;
this.head = head;
this.parent = null;
this.children = [];
};
/**
* Returns a share of the function's total time in application's total time.
*/
ProfileView.Node.prototype.__defineGetter__(
'totalPercent',
function() { return this.totalTime /
(this.head ? this.head.totalTime : this.totalTime) * 100.0; });
/**
* Returns a share of the function's self time in application's total time.
*/
ProfileView.Node.prototype.__defineGetter__(
'selfPercent',
function() { return this.selfTime /
(this.head ? this.head.totalTime : this.totalTime) * 100.0; });
/**
* Returns a share of the function's total time in its parent's total time.
*/
ProfileView.Node.prototype.__defineGetter__(
'parentTotalPercent',
function() { return this.totalTime /
(this.parent ? this.parent.totalTime : this.totalTime) * 100.0; });
/**
* Adds a child to the node.
*
* @param {ProfileView.Node} node Child node.
*/
ProfileView.Node.prototype.addChild = function(node) {
node.parent = this;
this.children.push(node);
};
/**
* Sorts all the node's children recursively.
*
* @param {function(ProfileView.Node,
* ProfileView.Node):number} sortFunc A sorting
* functions. Must comply with Array.sort sorting function requirements.
*/
ProfileView.Node.prototype.sortChildren = function(
sortFunc) {
this.children.sort(sortFunc);
};