2006-01-13 23:37:23 +00:00
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<!--
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vim:sw=4:ts=4:et:
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***** BEGIN LICENSE BLOCK *****
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Version: MPL 1.1/GPL 2.0/LGPL 2.1
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The contents of this file are subject to the Mozilla Public License Version
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1.1 (the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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for the specific language governing rights and limitations under the
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License.
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The Original Code is leak-gauge.pl
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The Initial Developer of the Original Code is the Mozilla Foundation.
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Portions created by the Initial Developer are Copyright (C) 2005
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the Initial Developer. All Rights Reserved.
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Contributor(s):
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L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
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Alternatively, the contents of this file may be used under the terms of
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either the GNU General Public License Version 2 or later (the "GPL"), or
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the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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in which case the provisions of the GPL or the LGPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of either the GPL or the LGPL, and not to allow others to
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use your version of this file under the terms of the MPL, indicate your
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decision by deleting the provisions above and replace them with the notice
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and other provisions required by the GPL or the LGPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the MPL, the GPL or the LGPL.
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***** END LICENSE BLOCK *****
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-->
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<html lang="en-US">
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<head>
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<title>Leak Gauge</title>
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<style type="text/css">
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2006-01-13 23:40:19 +00:00
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pre { margin: 0; }
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2006-01-13 23:37:23 +00:00
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pre.output { border: medium solid; padding: 1em; margin: 1em; }
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</style>
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<script type="text/javascript">
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var result = "";
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function run() {
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// A hash of objects (keyed by the first word of the line in the log)
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// that have two public methods, handle_line and dump (to be called using
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// call, above), along with any private data they need.
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var handlers = {
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"DOMWINDOW": {
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count: 0,
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windows: {},
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handle_line: function(line) {
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var match = line.match(/^([0-9a-f]*) (\S*)(.*)/);
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if (match) {
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var addr = match[1];
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var verb = match[2];
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var rest = match[3];
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if (verb == "created") {
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var m = rest.match(/ outer=([0-9a-f]*)$/);
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if (!m)
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throw "outer expected";
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this.windows[addr] = { outer: m[1] };
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++this.count;
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} else if (verb == "destroyed") {
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delete this.windows[addr];
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} else if (verb == "SetNewDocument") {
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var m = rest.match(/^ (.*)$/);
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if (!m)
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throw "URI expected";
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this.windows[addr][m[1]] = true;
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}
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}
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},
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dump: function() {
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for (var addr in this.windows) {
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var winobj = this.windows[addr];
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var outer = winobj.outer;
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delete winobj.outer;
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result += "Leaked " + (outer == "0" ? "outer" : "inner") +
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" window " + addr + " " +
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(outer == "0" ? "" : "(outer " + outer + ") ") +
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"at address " + addr + ".\n";
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for (var uri in winobj) {
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result += " ... with URI \"" + uri + "\".\n";
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}
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}
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},
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summary: function() {
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var len = 0;
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for (var w in this.windows)
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++len;
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result += 'Leaked ' + len + ' out of ' +
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this.count + " DOM Windows\n";
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}
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},
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"DOCUMENT": {
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count: 0,
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docs: {},
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handle_line: function(line) {
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var match = line.match(/^([0-9a-f]*) (\S*)(.*)/);
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if (match) {
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var addr = match[1];
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var verb = match[2];
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var rest = match[3];
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if (verb == "created") {
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this.docs[addr] = {};
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++this.count;
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} else if (verb == "destroyed") {
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delete this.docs[addr];
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} else if (verb == "ResetToURI" ||
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verb == "StartDocumentLoad") {
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var m = rest.match(/^ (.*)$/);
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if (!m)
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throw "URI expected";
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this.docs[addr][m[1]] = true;
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}
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}
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},
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dump: function() {
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for (var addr in this.docs) {
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var doc = this.docs[addr];
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result += "Leaked document at address " + addr + ".\n";
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for (var uri in doc) {
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result += " ... with URI \"" + uri + "\".\n";
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}
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}
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},
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summary: function() {
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var len = 0;
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for (var w in this.docs)
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++len;
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result += 'Leaked ' + len + ' out of ' +
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this.count + " documents\n";
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}
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},
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"DOCSHELL": {
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count: 0,
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shells: {},
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handle_line: function(line) {
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var match = line.match(/^([0-9a-f]*) (\S*)(.*)/);
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if (match) {
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var addr = match[1];
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var verb = match[2];
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var rest = match[3];
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if (verb == "created") {
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this.shells[addr] = {};
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++this.count;
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} else if (verb == "destroyed") {
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delete this.shells[addr];
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} else if (verb == "InternalLoad" ||
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verb == "SetCurrentURI") {
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var m = rest.match(/^ (.*)$/);
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if (!m)
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throw "URI expected";
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this.shells[addr][m[1]] = true;
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}
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}
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},
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dump: function() {
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for (var addr in this.shells) {
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var doc = this.shells[addr];
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result += "Leaked docshell at address " + addr + ".\n";
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for (var uri in doc) {
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result += " ... which loaded URI \"" + uri + "\".\n";
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}
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}
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},
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summary: function() {
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var len = 0;
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for (var w in this.shells)
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++len;
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result += 'Leaked ' + len + ' out of ' +
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this.count + " docshells\n";
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}
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}
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};
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netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
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const cs = Components.classes;
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const ifs = Components.interfaces;
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var filePicker = cs["@mozilla.org/filepicker;1"].
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createInstance(ifs.nsIFilePicker);
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filePicker.init(window, "Select NSPR Leak Log", ifs.nsIFilePicker.modeOpen);
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if (filePicker.show() != ifs.nsIFilePicker.returnOK)
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return;
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var is = cs["@mozilla.org/network/file-input-stream;1"].
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createInstance(ifs.nsIFileInputStream);
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const PR_RDONLY = 0x01;
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is.init(filePicker.file, PR_RDONLY, 0, 0);
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if (!(is instanceof ifs.nsILineInputStream))
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return;
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var line = { value: "" };
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do {
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var more = is.readLine(line);// yuck, returns false for last valid line
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// strip off initial "-", thread id, and thread pointer; separate
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// first word and rest
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var matches = line.value.match(/^\-?[0-9]*\[[0-9a-f]*\]: (\S*) (.*)$/);
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if (matches) {
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var handler = matches[1];
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var data = matches[2];
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if (typeof(handlers[handler]) != "undefined") {
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handlers[handler].handle_line(data);
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}
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}
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} while (more);
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for (var handler in handlers)
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handlers[handler].dump();
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result += "Summary:\n";
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for (var handler in handlers)
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handlers[handler].summary();
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var out = document.createElement("pre");
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out.className = "output";
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out.appendChild(document.createTextNode(result));
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result = "";
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document.body.appendChild(out);
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}
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</script>
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</head>
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<body>
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<h1>Leak Gauge</h1>
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2006-01-13 23:40:19 +00:00
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<pre>$Id: leak-gauge.html,v 1.2 2006/01/13 23:40:19 dbaron%dbaron.org Exp $</pre>
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2006-01-13 23:37:23 +00:00
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<p>This script is designed to help testers isolate and simplify testcases
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for many classes of leaks (those that involve large graphs of core
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data structures) in Mozilla-based browsers. It is designed to print
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information about what has leaked by processing a log taken while
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running the browser. Such a log can be taken over a long session of
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normal browsing and then the log can be processed to find sites that
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leak. Once a site is known to leak, the logging can then be repeated
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to figure out under what conditions the leak occurs.</p>
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2006-01-13 23:40:19 +00:00
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<p>The way to create this log is to set the environment variables:</p>
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<pre> NSPR_LOG_MODULES=DOMLeak:5,DocumentLeak:5,nsDocShellLeak:5
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NSPR_LOG_FILE=nspr.log <i>(or any other filename of your choice)</i></pre>
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<p>in your shell and then run the program.</p>
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<ul>
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<li>In a Windows command prompt, set environment variables with
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<pre> set VAR=value</pre></li>
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<li> In an sh-based shell such as bash, set environment variables with
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<pre> export VAR=value</pre></li>
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<li>In a csh-based shell such as tcsh, set environment variables with
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<pre> setenv VAR value</pre></li>
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</ul>
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2006-01-13 23:37:23 +00:00
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<p>Then <a href="javascript:run()">enter the filename</a> of the log and you'll
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see the output, which will tell you which of certain core objects leaked and
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the URLs associated with those objects.</p>
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</body>
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</html>
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