gecko-dev/testing/mochitest/cc-analyzer.js

127 lines
3.0 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
function CCAnalyzer() {
}
CCAnalyzer.prototype = {
clear: function () {
this.callback = null;
this.processingCount = 0;
this.graph = {};
this.roots = [];
this.garbage = [];
this.edges = [];
this.listener = null;
},
run: function (aCallback) {
this.clear();
this.callback = aCallback;
this.listener = Cc["@mozilla.org/cycle-collector-logger;1"].
createInstance(Ci.nsICycleCollectorListener);
this.listener.disableLog = true;
this.listener.wantAfterProcessing = true;
this.runCC(3);
},
runCC: function (aCounter) {
let utils = window.QueryInterface(Ci.nsIInterfaceRequestor).
getInterface(Ci.nsIDOMWindowUtils);
if (aCounter > 1) {
utils.garbageCollect();
setTimeout(this.runCC.bind(this, aCounter - 1), 0);
} else {
utils.garbageCollect(this.listener);
this.processLog();
}
},
processLog: function () {
// Process entire heap step by step in 5K chunks
for (let i = 0; i < 5000; i++) {
if (!this.listener.processNext(this)) {
this.callback();
this.clear();
return;
}
}
// Next chunk on timeout.
setTimeout(this.processLog.bind(this), 0);
},
noteRefCountedObject: function (aAddress, aRefCount, aObjectDescription) {
let o = this.ensureObject(aAddress);
o.address = aAddress;
o.refcount = aRefCount;
o.name = aObjectDescription;
},
noteGCedObject: function (aAddress, aMarked, aObjectDescription) {
let o = this.ensureObject(aAddress);
o.address = aAddress;
o.gcmarked = aMarked;
o.name = aObjectDescription;
},
noteEdge: function (aFromAddress, aToAddress, aEdgeName) {
let fromObject = this.ensureObject(aFromAddress);
let toObject = this.ensureObject(aToAddress);
fromObject.edges.push({name: aEdgeName, to: toObject});
toObject.owners.push({name: aEdgeName, from: fromObject});
this.edges.push({
name: aEdgeName,
from: fromObject,
to: toObject
});
},
describeRoot: function (aAddress, aKnownEdges) {
let o = this.ensureObject(aAddress);
o.root = true;
o.knownEdges = aKnownEdges;
this.roots.push(o);
},
describeGarbage: function (aAddress) {
let o = this.ensureObject(aAddress);
o.garbage = true;
this.garbage.push(o);
},
ensureObject: function (aAddress) {
if (!this.graph[aAddress])
this.graph[aAddress] = new CCObject();
return this.graph[aAddress];
},
find: function (aText) {
let result = [];
for each (let o in this.graph) {
if (!o.garbage && o.name.indexOf(aText) >= 0)
result.push(o);
}
return result;
}
};
function CCObject() {
this.name = "";
this.address = null;
this.refcount = 0;
this.gcmarked = false;
this.root = false;
this.garbage = false;
this.knownEdges = 0;
this.edges = [];
this.owners = [];
}