mirror of
https://github.com/roytam1/palemoon27.git
synced 2026-06-04 07:29:07 +00:00
JustOff
130 lines
3.3 KiB
JavaScript
130 lines
3.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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module.metadata = {
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"stability": "deprecated"
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};
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const { Cc, Ci, Cu, components } = require("chrome");
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const { when: unload } = require("../system/unload")
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var trackedObjects = {};
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const Compacter = {
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notify: function() {
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var newTrackedObjects = {};
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for (let name in trackedObjects) {
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let oldBin = trackedObjects[name];
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let newBin = [];
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let strongRefs = [];
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for (let i = 0, l = oldBin.length; i < l; i++) {
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let strongRef = oldBin[i].weakref.get();
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if (strongRef && strongRefs.indexOf(strongRef) == -1) {
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strongRefs.push(strongRef);
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newBin.push(oldBin[i]);
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}
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}
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if (newBin.length)
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newTrackedObjects[name] = newBin;
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}
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trackedObjects = newTrackedObjects;
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}
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};
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var timer = Cc["@mozilla.org/timer;1"]
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.createInstance(Ci.nsITimer);
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timer.initWithCallback(Compacter,
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5000,
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Ci.nsITimer.TYPE_REPEATING_SLACK);
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function track(object, bin, stackFrameNumber) {
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var frame = components.stack.caller;
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var weakref = Cu.getWeakReference(object);
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if (!bin && 'constructor' in object)
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bin = object.constructor.name;
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if (bin == "Object")
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bin = frame.name;
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if (!bin)
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bin = "generic";
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if (!(bin in trackedObjects))
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trackedObjects[bin] = [];
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if (stackFrameNumber > 0)
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for (var i = 0; i < stackFrameNumber; i++)
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frame = frame.caller;
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trackedObjects[bin].push({weakref: weakref,
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created: new Date(),
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filename: frame.filename,
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lineNo: frame.lineNumber,
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bin: bin});
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}
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exports.track = track;
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var getBins = exports.getBins = function getBins() {
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var names = [];
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for (let name in trackedObjects)
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names.push(name);
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return names;
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};
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function getObjects(bin) {
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var results = [];
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function getLiveObjectsInBin(bin) {
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for (let i = 0, l = bin.length; i < l; i++) {
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let object = bin[i].weakref.get();
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if (object) {
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results.push(bin[i]);
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}
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}
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}
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if (bin) {
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if (bin in trackedObjects)
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getLiveObjectsInBin(trackedObjects[bin]);
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}
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else {
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for (let name in trackedObjects)
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getLiveObjectsInBin(trackedObjects[name]);
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}
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return results;
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}
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exports.getObjects = getObjects;
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function gc() {
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// Components.utils.forceGC() doesn't currently perform
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// cycle collection, which means that e.g. DOM elements
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// won't be collected by it. Fortunately, there are
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// other ways...
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var test_utils = Cc["@mozilla.org/appshell/appShellService;1"]
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.getService(Ci.nsIAppShellService)
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.hiddenDOMWindow
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.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIDOMWindowUtils);
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test_utils.garbageCollect();
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// Clean metadata for dead objects
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Compacter.notify();
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// Not sure why, but sometimes it appears that we don't get
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// them all with just one CC, so let's do it again.
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test_utils.garbageCollect();
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};
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exports.gc = gc;
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unload(_ => {
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trackedObjects = {};
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if (timer) {
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timer.cancel();
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timer = null;
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}
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});
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