[wpe-webkit] Tests crashing - debug build: responsiveness & web process caching

Krzysztof Konopko kris at youview.com
Tue Dec 7 09:44:36 PST 2021

On Fri, Dec 03, 2021 at 05:33:15PM +0100, Krzysztof Konopko wrote:
> Hi,
> When upgrading WPE from 2.30.x to 2.34.1 in our integration, we
> encountered some of our tests crashing.  I also checked WebKit WPE tests
> (pulled from the main branch today) and some of them crash in the same
> manner:  http://ix.io/3GTh
> Quite importantly, this is for *debug* builds where assertions are active.
> Crashes seem to be related to the responsiveness feature and web
> process caching (upon termination).  Looks like object lifecycle is not
> quite right upon destruction in this case (switching between weak and
> strong references).  We didn't see this problem with 2.30.x.
> BTW, would be nice if there was a settings API to disable process
> caching.  Some embedded integrations do not intend to reuse web
> processes if they launch each web process instance in a separate
> sandbox and do not use multiple tabs (only the main full-screen page).
> Basically, if we patch WebKit to not cache web process in the pool, then
> all these problems go away (although still lurking in the code).
> Is this a known problem?  It's clearly present on WebKit main branch.

After discussing it on #wpe IRC channel, submitted a bug:


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