Bug 140998 – [GTK] Runtime critical warnings sometimes at start up when using the network process

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Carlos Garcia Campos]

(WebKitWebProcess:1594): GLib-CRITICAL **: g_main_loop_run: assertion 'loop != NULL' failed

(WebKitWebProcess:1617): GLib-CRITICAL **: g_main_loop_run: assertion 'loop != NULL' failed

(WebKitWebProcess:1609): GLib-CRITICAL **: g_main_loop_run: assertion 'loop != NULL' failed

(WebKitWebProcess:1613): GLib-CRITICAL **: g_main_loop_run: assertion 'loop != NULL' failed

(WebKitWebProcess:1638): GLib-CRITICAL **: g_main_loop_run: assertion 'loop != NULL' failed

This is caused by the CustomProtocolManager work queue theread. This WorkQueue is created when the CustomProtocolManager object is constructed, but destroyed when it's initialized when the UI process asks to use the network process. In this case, sometimes happens that the work queue thread that runs the main loop is executed once the object has been destroyed and the main loop pointer is null.

[Carlos Garcia Campos]

Created attachment 245542 [details]
Patch

Detach the worker thread when the work queue is destroyed, right before deleting the main loop

[WebKit Commit Bot]

Attachment 245542 [details] did not pass style-queue:


ERROR: Source/WebKit2/Platform/gtk/WorkQueueGtk.cpp:55:  More than one command on the same line  [whitespace/newline] [4]
Total errors found: 1 in 2 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Zan Dobersek]

Comment on attachment 245542 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=245542&action=review

> Source/WebKit2/Platform/gtk/WorkQueueGtk.cpp:55
> -    m_workQueueThread = createThread(reinterpret_cast<WTF::ThreadFunction>(&WorkQueue::startWorkQueueThread), this, threadName);
> +    m_workQueueThread = createThread(threadName, [this] { g_main_loop_run(m_eventLoop.get()); });

WorkQueue is ref-counted. This should probably pass a RefPtr protector into the lambda.

[Carlos Garcia Campos]

Committed r179395: <http://trac.webkit.org/changeset/179395>