1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<!--
vim:sw=4:ts=4:et:
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/.
-->
<html lang="en-US">
<head>
<meta charset="UTF-8" />
<title>Leak Gauge</title>
<style type="text/css">
pre { margin: 0; }
pre.output { border: medium solid; padding: 1em; margin: 1em; }
</style>
<script type="text/javascript">
function runfile(file) {
var result = "Results of processing log " + file.fileName + " :\n";
var fileReader = new FileReader();
fileReader.onload = function(e)
{
runContents(result, e.target.result);
}
fileReader.readAsText(file, "iso-8859-1");
}
function runContents(result, contents) {
// A hash of objects (keyed by the first word of the line in the log)
// that have two public methods, handle_line and dump (to be called using
// call, above), along with any private data they need.
var handlers = {
"DOMWINDOW": {
count: 0,
windows: {},
handle_line: function(line) {
var match = line.match(/^([0-9a-f]*) (\S*)(.*)/);
if (match) {
var addr = match[1];
var verb = match[2];
var rest = match[3];
if (verb == "created") {
var m = rest.match(/ outer=([0-9a-f]*)$/);
if (!m)
throw "outer expected";
this.windows[addr] = { outer: m[1] };
++this.count;
} else if (verb == "destroyed") {
delete this.windows[addr];
} else if (verb == "SetNewDocument") {
var m = rest.match(/^ (.*)$/);
if (!m)
throw "URI expected";
this.windows[addr][m[1]] = true;
}
}
},
dump: function() {
for (var addr in this.windows) {
var winobj = this.windows[addr];
var outer = winobj.outer;
delete winobj.outer;
result += "Leaked " + (outer == "0" ? "outer" : "inner") +
" window " + addr + " " +
(outer == "0" ? "" : "(outer " + outer + ") ") +
"at address " + addr + ".\n";
for (var uri in winobj) {
result += " ... with URI \"" + uri + "\".\n";
}
}
},
summary: function() {
var len = 0;
for (var w in this.windows)
++len;
result += 'Leaked ' + len + ' out of ' +
this.count + " DOM Windows\n";
}
},
"DOCUMENT": {
count: 0,
docs: {},
handle_line: function(line) {
var match = line.match(/^([0-9a-f]*) (\S*)(.*)/);
if (match) {
var addr = match[1];
var verb = match[2];
var rest = match[3];
if (verb == "created") {
this.docs[addr] = {};
++this.count;
} else if (verb == "destroyed") {
delete this.docs[addr];
} else if (verb == "ResetToURI" ||
verb == "StartDocumentLoad") {
var m = rest.match(/^ (.*)$/);
if (!m)
throw "URI expected";
var uri = m[1];
var doc_info = this.docs[addr];
doc_info[uri] = true;
if ("nim" in doc_info) {
doc_info["nim"][uri] = true;
}
}
}
},
dump: function() {
for (var addr in this.docs) {
var doc = this.docs[addr];
result += "Leaked document at address " + addr + ".\n";
for (var uri in doc) {
if (uri != "nim") {
result += " ... with URI \"" + uri + "\".\n";
}
}
}
},
summary: function() {
var len = 0;
for (var w in this.docs)
++len;
result += 'Leaked ' + len + ' out of ' +
this.count + " documents\n";
}
},
"DOCSHELL": {
count: 0,
shells: {},
handle_line: function(line) {
var match = line.match(/^([0-9a-f]*) (\S*)(.*)/);
if (match) {
var addr = match[1];
var verb = match[2];
var rest = match[3];
if (verb == "created") {
this.shells[addr] = {};
++this.count;
} else if (verb == "destroyed") {
delete this.shells[addr];
} else if (verb == "InternalLoad" ||
verb == "SetCurrentURI") {
var m = rest.match(/^ (.*)$/);
if (!m)
throw "URI expected";
this.shells[addr][m[1]] = true;
}
}
},
dump: function() {
for (var addr in this.shells) {
var doc = this.shells[addr];
result += "Leaked docshell at address " + addr + ".\n";
for (var uri in doc) {
result += " ... which loaded URI \"" + uri + "\".\n";
}
}
},
summary: function() {
var len = 0;
for (var w in this.shells)
++len;
result += 'Leaked ' + len + ' out of ' +
this.count + " docshells\n";
}
},
"NODEINFOMANAGER": {
count: 0,
nims: {},
handle_line: function(line) {
var match = line.match(/^([0-9a-f]*) (\S*)(.*)/);
if (match) {
var addr = match[1];
var verb = match[2];
var rest = match[3];
if (verb == "created") {
this.nims[addr] = {};
++this.count;
} else if (verb == "destroyed") {
delete this.nims[addr];
} else if (verb == "Init") {
var m = rest.match(/^ document=(.*)$/);
if (!m)
throw "document pointer expected";
var nim_info = this.nims[addr];
var doc = m[1];
if (doc != "0") {
var doc_info = handlers["DOCUMENT"].docs[doc];
for (var uri in doc_info) {
nim_info[uri] = true;
}
doc_info["nim"] = nim_info;
}
}
}
},
dump: function() {
for (var addr in this.nims) {
var nim = this.nims[addr];
result += "Leaked content nodes associated with node info manager at address " + addr + ".\n";
for (var uri in nim) {
result += " ... with document URI \"" + uri + "\".\n";
}
}
},
summary: function() {
var len = 0;
for (var w in this.nims)
++len;
result += 'Leaked content nodes in ' + len + ' out of ' +
this.count + " documents\n";
}
}
};
var lines = contents.split(/[\r\n]+/);
for (var j in lines) {
var line = lines[j];
// strip off initial "-", thread id, and thread pointer; separate
// first word and rest
var matches = line.match(/^\-?[0-9]*\[[0-9a-f]*\]: (\S*) (.*)$/);
if (matches) {
var handler = matches[1];
var data = matches[2];
if (typeof(handlers[handler]) != "undefined") {
handlers[handler].handle_line(data);
}
}
}
for (var handler in handlers)
handlers[handler].dump();
if (result.length)
result += "\n";
result += "Summary:\n";
for (var handler in handlers)
handlers[handler].summary();
result += "\n";
var out = document.createElement("pre");
out.className = "output";
out.appendChild(document.createTextNode(result));
document.body.appendChild(out);
}
function run() {
var input = document.getElementById("fileinput");
var files = input.files;
for (var i = 0; i < files.length; ++i)
runfile(files[i]);
// So the user can process the same filename again (after
// overwriting the log), clear the value on the form input so we
// will always get an onchange event.
input.value = "";
}
</script>
</head>
<body>
<h1>Leak Gauge</h1>
<pre>$Id: leak-gauge.html,v 1.8 2008/02/08 19:55:34 dbaron%dbaron.org Exp $</pre>
<p>This script is designed to help testers isolate and simplify testcases
for many classes of leaks (those that involve large graphs of core
data structures) in Mozilla-based browsers. It is designed to print
information about what has leaked by processing a log taken while
running the browser. Such a log can be taken over a long session of
normal browsing and then the log can be processed to find sites that
leak. Once a site is known to leak, the logging can then be repeated
to figure out under what conditions the leak occurs.</p>
<p>The way to create this log is to set the environment variables:</p>
<pre> MOZ_LOG=DOMLeak:5,DocumentLeak:5,nsDocShellLeak:5,NodeInfoManagerLeak:5
MOZ_LOG_FILE=nspr.log <i>(or any other filename of your choice)</i></pre>
<p>in your shell and then run the program.</p>
<ul>
<li>In a Windows command prompt, set environment variables with
<pre> set VAR=value</pre></li>
<li> In an sh-based shell such as bash, set environment variables with
<pre> export VAR=value</pre></li>
<li>In a csh-based shell such as tcsh, set environment variables with
<pre> setenv VAR value</pre></li>
</ul>
<p>Once you have this log from a complete run of the browser (you have
to exit; otherwise it will look like everything leaked), you can load
this page (be careful not to overwrite the log when starting the browser
to load this page) and enter the filename of the log:</p>
<p><input type="file" id="fileinput" onchange="run()"></p>
<p>Then you'll see the output below, which will tell you which of
certain core objects leaked and the URLs associated with those
objects.</p>
</body>
</html>
|
