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
|
<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480
-->
<window title="Mozilla Bug 1123480"
xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
onload="RunTest();">
<title>nsTransferable PBM Overflow Selection Test</title>
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
<script type="application/javascript">
<![CDATA[
// Create over 1 MB of sample garbage text. JavaScript strings are represented by
// UTF16 strings, so the size is twice as much as the actual string length.
// This value is chosen such that the size of the memory for the string exceeds
// the kLargeDatasetSize threshold in nsTransferable.h.
// It is also not a round number to reduce the odds of having an accidental
// collisions with another file (since the test below looks at the file size
// to identify the file).
var Ipsum = "0123456789".repeat(1234321);
var IpsumByteLength = Ipsum.length * 2;
var SHORT_STRING_NO_CACHE = "short string that will never be cached to the disk";
function isWindows() {
const {AppConstants} = ChromeUtils.import("resource://gre/modules/AppConstants.jsm");
return AppConstants.platform === 'win';
}
// Get a list of open file descriptors that refer to a file with the same size as
// the expected data (and assume that any mutations in file descriptor counts
// are caused by our test).
function getClipboardCacheFDCount() {
var dir;
if (isWindows()) {
// On Windows, nsAnonymousTemporaryFile does not immediately delete the file.
// Instead, the Windows-specific FILE_FLAG_DELETE_ON_CLOSE flag is used,
// which means that the file is deleted when the last handle is closed.
// Apparently, this flag is unreliable (e.g. when the application crashes),
// so nsAnonymousTemporaryFile stores the temporary files in a subdirectory,
// which is cleaned up some time after start-up.
// This is just a test, and during the test we deterministically close the
// handles, so if FILE_FLAG_DELETE_ON_CLOSE does the thing it promises, the
// file is actually removed when the handle is closed.
var {FileUtils} = ChromeUtils.import("resource://gre/modules/FileUtils.jsm");
// Path from nsAnonymousTemporaryFile.cpp, GetTempDir.
dir = FileUtils.getFile("TmpD", ["mozilla-temp-files"]);
} else {
dir = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
dir.initWithPath("/dev/fd");
}
var count = 0;
for (var de = dir.directoryEntries; de.hasMoreElements(); ) {
var fdFile = de.nextFile;
var fileSize;
try {
fileSize = fdFile.fileSize;
} catch (e) {
// This can happen on macOS.
continue;
}
if (fileSize === IpsumByteLength) {
// Assume that the file was created by us if the size matches.
++count;
}
}
return count;
}
async function RunTest() {
SimpleTest.waitForExplicitFinish();
const gClipboardHelper = Cc["@mozilla.org/widget/clipboardhelper;1"].getService(Ci.nsIClipboardHelper);
// Sanitize environment
gClipboardHelper.copyString(SHORT_STRING_NO_CACHE);
await new Promise(resolve => setTimeout(resolve, 0));
var initialFdCount = getClipboardCacheFDCount();
// Overflow a nsTransferable region by using the clipboard helper
gClipboardHelper.copyString(Ipsum);
// gClipboardHelper.copyString also puts the data on the selection
// clipboard if the platform supports it.
var expectedFdDelta = Services.clipboard.isClipboardTypeSupported(Services.clipboard.kSelectionClipboard) ? 2 : 1;
// Undefined private browsing mode should cache to disk
is(getClipboardCacheFDCount(), initialFdCount + expectedFdDelta, "should cache to disk when PBM is undefined");
// Sanitize environment again.
gClipboardHelper.copyString(SHORT_STRING_NO_CACHE);
await new Promise(resolve => setTimeout(resolve, 0));
is(getClipboardCacheFDCount(), initialFdCount, "should have cleared the clipboard data");
// Repeat procedure of plain text selection with private browsing
// disabled and enabled
const {PrivateBrowsingUtils} = ChromeUtils.import("resource://gre/modules/PrivateBrowsingUtils.jsm");
for (let private of [false, true]) {
var win = window.browsingContext.topChromeWindow.open("about:blank", "_blank", "chrome, width=500, height=200" + (private ? ", private" : ""));
ok(win, private ? "should open private window" : "should open non-private window");
is(PrivateBrowsingUtils.isContentWindowPrivate(win), private, "used correct window context");
// Select plaintext in private/non-private channel
const nsTransferable = Components.Constructor("@mozilla.org/widget/transferable;1", "nsITransferable");
const nsSupportsString = Components.Constructor("@mozilla.org/supports-string;1", "nsISupportsString");
var Loadctx = PrivateBrowsingUtils.privacyContextFromWindow(win);
var Transfer = nsTransferable();
var Suppstr = nsSupportsString();
Suppstr.data = Ipsum;
Transfer.init(Loadctx);
Transfer.addDataFlavor("text/plain");
Transfer.setTransferData("text/plain", Suppstr);
// Enabled private browsing mode should not cache any selection to disk; disabled should
if (private) {
is(getClipboardCacheFDCount(), initialFdCount, "did not violate private browsing mode");
} else {
is(getClipboardCacheFDCount(), initialFdCount + 1, "should save memory by caching non-private clipboard data to disk");
}
// Share the transferable with the system.
Services.clipboard.setData(Transfer, null, Services.clipboard.kGlobalClipboard);
if (private) {
is(getClipboardCacheFDCount(), initialFdCount, "did not violate private browsing mode");
} else {
is(getClipboardCacheFDCount(), initialFdCount + 1, "should save memory by caching non-private clipboard data to disk");
}
// Sanitize the environment.
Suppstr = nsSupportsString();
Suppstr.data = SHORT_STRING_NO_CACHE;
Transfer.setTransferData("text/plain", Suppstr);
await new Promise(resolve => setTimeout(resolve, 0));
is(getClipboardCacheFDCount(), initialFdCount, "should drop the cache file, if any.");
Services.clipboard.setData(Transfer, null, Services.clipboard.kGlobalClipboard);
is(getClipboardCacheFDCount(), initialFdCount, "should postsanitize the environment");
}
SimpleTest.finish();
}
]]>
</script>
<!-- test results are displayed in the html:body -->
<body xmlns="http://www.w3.org/1999/xhtml">
<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1123480"
target="_blank">Mozilla Bug 1123480</a>
</body>
</window>
|
