v8/tools/profile_view.js

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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.
// Initlialize namespaces
var devtools = devtools || {};
devtools.profiler = devtools.profiler || {};
/**
* Creates a Profile View builder object.
*
* @param {number} samplingRate Number of ms between profiler ticks.
* @constructor
*/
devtools.profiler.ViewBuilder = function(samplingRate) {
this.samplingRate = samplingRate;
};
/**
* Builds a profile view for the specified call tree.
*
* @param {devtools.profiler.CallTree} callTree A call tree.
*/
devtools.profiler.ViewBuilder.prototype.buildView = function(
callTree) {
var head;
var samplingRate = this.samplingRate;
callTree.traverse(function(node, viewParent) {
var viewNode = new devtools.profiler.ProfileView.Node(
node.label, node.totalWeight * samplingRate,
node.selfWeight * samplingRate, head);
if (viewParent) {
viewParent.addChild(viewNode);
} else {
head = viewNode;
}
return viewNode;
});
var view = new devtools.profiler.ProfileView(head);
return view;
};
/**
* Creates a Profile View object. It allows to perform sorting
* and filtering actions on the profile. Profile View mimicks
* the Profile object from WebKit's JSC profiler.
*
* @param {devtools.profiler.ProfileView.Node} head Head (root) node.
* @constructor
*/
devtools.profiler.ProfileView = function(head) {
this.head = head;
this.title = '';
this.uid = '';
this.heavyProfile = null;
this.treeProfile = null;
this.flatProfile = null;
};
/**
* Updates references between profiles. This is needed for WebKit
* ProfileView.
*/
devtools.profiler.ProfileView.prototype.updateProfilesRefs = function() {
var profileNames = ["treeProfile", "heavyProfile", "flatProfile"];
for (var i = 0; i < profileNames.length; ++i) {
var destProfile = this[profileNames[i]];
for (var j = 0; j < profileNames.length; ++j) {
destProfile[profileNames[j]] = this[profileNames[j]];
}
}
};
/**
* Sorts the profile view using the specified sort function.
*
* @param {function(devtools.profiler.ProfileView.Node,
* devtools.profiler.ProfileView.Node):number} sortFunc A sorting
* functions. Must comply with Array.sort sorting function requirements.
*/
devtools.profiler.ProfileView.prototype.sort = function(sortFunc) {
this.traverse(function (node) {
node.sortChildren(sortFunc);
});
};
/**
* Sorts the profile view by self time, ascending.
*/
devtools.profiler.ProfileView.prototype.sortSelfTimeAscending = function() {
this.sort(function (node1, node2) {
return node1.selfTime - node2.selfTime; });
};
/**
* Sorts the profile view by self time, descending.
*/
devtools.profiler.ProfileView.prototype.sortSelfTimeDescending = function() {
this.sort(function (node1, node2) {
return node2.selfTime - node1.selfTime; });
};
/**
* Sorts the profile view by total time, ascending.
*/
devtools.profiler.ProfileView.prototype.sortTotalTimeAscending = function() {
this.sort(function (node1, node2) {
return node1.totalTime - node2.totalTime; });
};
/**
* Sorts the profile view by total time, descending.
*/
devtools.profiler.ProfileView.prototype.sortTotalTimeDescending = function() {
this.sort(function (node1, node2) {
return node2.totalTime - node1.totalTime; });
};
/**
* String comparator compatible with Array.sort requirements.
*
* @param {string} s1 First string.
* @param {string} s2 Second string.
*/
devtools.profiler.ProfileView.compareStrings = function(s1, s2) {
return s1 < s2 ? -1 : (s1 > s2 ? 1 : 0);
};
/**
* Sorts the profile view by function name, ascending.
*/
devtools.profiler.ProfileView.prototype.sortFunctionNameAscending = function() {
this.sort(function (node1, node2) {
return devtools.profiler.ProfileView.compareStrings(
node1.functionName, node2.functionName); });
};
/**
* Sorts the profile view by function name, descending.
*/
devtools.profiler.ProfileView.prototype.sortFunctionNameDescending = function() {
this.sort(function (node1, node2) {
return devtools.profiler.ProfileView.compareStrings(
node2.functionName, node1.functionName); });
};
/**
* Traverses profile view nodes in preorder.
*
* @param {function(devtools.profiler.ProfileView.Node)} f Visitor function.
*/
devtools.profiler.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 {devtools.profiler.ProfileView.Node} head Profile view head.
* @constructor
*/
devtools.profiler.ProfileView.Node = function(
internalFuncName, totalTime, selfTime, head) {
this.callIdentifier = 0;
this.internalFuncName = internalFuncName;
this.initFuncInfo();
this.totalTime = totalTime;
this.selfTime = selfTime;
this.head = head;
this.parent = null;
this.children = [];
this.visible = true;
};
/**
* RegEx for stripping V8's prefixes of compiled functions.
*/
devtools.profiler.ProfileView.Node.FUNC_NAME_STRIP_RE =
/^(?:LazyCompile|Function): (.*)$/;
/**
* RegEx for extracting script source URL and line number.
*/
devtools.profiler.ProfileView.Node.FUNC_NAME_PARSE_RE = /^([^ ]+) (.*):(\d+)$/;
/**
* RegEx for removing protocol name from URL.
*/
devtools.profiler.ProfileView.Node.URL_PARSE_RE = /^(?:http:\/)?.*\/([^/]+)$/;
/**
* Inits 'functionName', 'url', and 'lineNumber' fields using 'internalFuncName'
* field.
*/
devtools.profiler.ProfileView.Node.prototype.initFuncInfo = function() {
var nodeAlias = devtools.profiler.ProfileView.Node;
this.functionName = this.internalFuncName;
var strippedName = nodeAlias.FUNC_NAME_STRIP_RE.exec(this.functionName);
if (strippedName) {
this.functionName = strippedName[1];
}
var parsedName = nodeAlias.FUNC_NAME_PARSE_RE.exec(this.functionName);
if (parsedName) {
this.url = parsedName[2];
var parsedUrl = nodeAlias.URL_PARSE_RE.exec(this.url);
if (parsedUrl) {
this.url = parsedUrl[1];
}
this.functionName = parsedName[1];
this.lineNumber = parsedName[3];
} else {
this.url = '';
this.lineNumber = 0;
}
};
/**
* Returns a share of the function's total time in application's total time.
*/
devtools.profiler.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.
*/
devtools.profiler.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.
*/
devtools.profiler.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 {devtools.profiler.ProfileView.Node} node Child node.
*/
devtools.profiler.ProfileView.Node.prototype.addChild = function(node) {
node.parent = this;
this.children.push(node);
};
/**
* Sorts all the node's children recursively.
*
* @param {function(devtools.profiler.ProfileView.Node,
* devtools.profiler.ProfileView.Node):number} sortFunc A sorting
* functions. Must comply with Array.sort sorting function requirements.
*/
devtools.profiler.ProfileView.Node.prototype.sortChildren = function(
sortFunc) {
this.children.sort(sortFunc);
};