Bug 268069 – No iOS Safari WebRTC logs available through Console

• Status: RESOLVED
• Resolution: INVALID
• Component: WebRTC

Created attachment 469543 [details]
sysdiagnose

No iOS Safari WebRTC logs available through Console.

Steps, that I did to retrieve them:

1. Connected iOS device to the Mac with a USB cable.
2. Opened https://webrtc.github.io/samples/src/content/peerconnection/pc1/ in Safari on iOS
3. Opened the Mac Safari Web Inspector for iOS Web Page.
4. Updated the WebRTC log setting (to Verbose), started call in webrtc samples -> there is verbose logging in Web Inspector, but these are not LibWebRTC logs
5. Opened console application, selected iOS device, pressed ‘Start streaming’, filtered with category:Webrtc -> console app is empty (will attach screenshot)

I am also attaching sysdiagnose file

Created attachment 469544 [details]
console app screenshot

[Radar WebKit Bug Importer]

<rdar://problem/122081559>

[youenn fablet]

Thanks for the report, it would have been great to get the iOS sysdiagnose.

[Maria Ivanova]

Created attachment 469770 [details]
sysdiagnose from iOS

[youenn fablet]

I cannot reproduce on an internal device but I can reproduce the bug on a non internal device.
In fact, on a non internal device, I do not see any webkit log (coming from WebContentExtension or network process at least). I can see logs from MobileSafari (including some WebRTC logs).

I can see plenty of diagnosticd logs like:
error	15:14:09.249644+0100	kernel	Sandbox: com.apple.WebKit.Networking(9582) deny(1) mach-lookup com.apple.diagnosticd

The sandbox is apparently blocking diagnosticd in regular devices but not internal devices. Could that explain the issue?

[youenn fablet]

The iOS sysdiagnose archive (system_logs.logarchive file( contains the libwebrtc messages:
2024-02-08 11:30:05.892216+0100 0x499A2    Default   0x0                  3608   0 com.apple.WebKit.Networking: (WebKit) [com.apple.WebKit:WebRTC] WebContent[3606]: LibWebRTC message: (goog_cc_network_control.cc:713): bwe 24198226 pushback_target_bps=3785066 estimate_bps=3785066

Per Arne pointed out that the issue might be that these logs are not appearing in the console on regular OS versions.
You might want to file a FB request.

In the meantime, you can look at the logs after taking a sysdiagnose.

I filed https://bugs.webkit.org/show_bug.cgi?id=269196 to allow to get these logs from web inspector directly, which might be more convenient.

[youenn fablet]

Marking as Invalid, given the issue is not in WebKit.

[Kaustav]

I can confirm that webrtc verbose logs are available in sysdiagnose