Closed Bug 919051 Opened 9 years ago Closed 9 years ago

Media Recording - memory leak when record a media stream without any tracks


(Core :: Audio/Video: Recording, defect)

Not set



blocking-b2g -


(Reporter: jruderman, Assigned: rlin)


(Keywords: memory-leak, testcase)


(3 files, 2 obsolete files)

Attached file testcase
1. Run a debug build with XPCOM_MEM_LEAK_LOG=2
2. Load the testcase
3. Quit

Result: trace-refcnt reports leaked MediaStream and other objects.
Attached file what leaked?
Assignee: nobody → rlin
The Media Recorder get the media stream object without tracks and enter recording state.
I will fix it.
FWIW - this is good candidate to get a mochitest with btw. You could just create a test that models the exact test case included with an additional check that the InvalidStateError fires when calling start a 2nd time.
I will let media recorder throw the InvalidStateError exception when we got this kind of source.
BTW, correct the comment 2, now it failed on principal check (no source can be checked) and throw security error without destroy the TrackUnionStream object, this unclear message would confuse UA.
Summary: MediaRecorder leak → Media Recording - memory leak when record a media stream without any tracks
Attached patch patch v1 (obsolete) — Splinter Review
patch for this bug, also include the test case.
Attachment #809795 - Flags: review?(roc)
Attachment #809795 - Flags: review?(jsmith)
Comment on attachment 809795 [details] [diff] [review]
patch v1

Review of attachment 809795 [details] [diff] [review]:

review+ with nits

::: content/media/test/test_mediarecorder_record_nosrc.html
@@ +5,5 @@
> +  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
> +  <script type="text/javascript" src="manifest.js"></script>
> +</head>
> +<body>
> +<a target="_blank" href="">Mozill

Nit - the href link should point to bug 919051

@@ +14,5 @@
> +function startTest() {
> +  var mediastream = document.createElement('video').mozCaptureStream();
> +
> +  var mr = new MediaRecorder(mediastream);
> +  ok(true, 'create MediaRecorder');

Nit - I would make this an info statement
Attachment #809795 - Flags: review?(jsmith) → review+
Attached patch check-in patch (obsolete) — Splinter Review
Check in patch, carry reviewer, merge with today's mc change.
try result
Attached patch check-in patchSplinter Review
this one, remove two useless header include.
Attachment #811036 - Attachment is obsolete: true
Attachment #809795 - Attachment is obsolete: true
Closed: 9 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla27
Verified through successful landing of mochitest.
bug 924724, which is koi+, depends on the change here. Need to uplift this patch
blocking-b2g: --- → koi?
(In reply to C.J. Ku[:CJKu] from comment #12)
> bug 924724, which is koi+, depends on the change here. Need to uplift this
> patch

That shouldn't influence if this bug is a blocker or not. What you need to do on bug 924724 is build a branch-specific patch to fix the issue independent of this bug.

I don't think this bug is a blocker either - it's not a likely use case a developer will do & memory leak impact isn't critical.
blocking-b2g: koi? → -
If the branch-specific patch ends up being "roll these changes into that patch", it would be preferable to just land these changes under this bug number. Also, we have a lot of historical precedent for "blocks a blocker" approvals.
Component: Video/Audio → Video/Audio: Recording
No longer blocks: MediaRecording
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