Bug 25121 – Upstream changes to handle error messages from V8 when running worker script.

• Component: WebCore Misc.
• Status: RESOLVED FIXED

[Jian Li]

Upstream changes to handle error messages from V8 when running worker script.

[Jian Li]

Created attachment 29384 [details]
Proposed Patch

[Darin Fisher (:fishd, Google)]

Comment on attachment 29384 [details]
Proposed Patch

LGTM

> +    // Do the one-time initialization.
> +    static bool v8Initialized = false;
> +    if (!v8Initialized) {
> +        // Tells V8 not to call the default OOM handler, binding code will handle it.
> +        v8::V8::IgnoreOutOfMemoryException();
> +        v8::V8::SetFatalErrorHandler(reportFatalErrorInV8);
> +        
> +        v8::V8::AddMessageListener(handleConsoleMessage);
> +        
> +        v8Initialized = true;
> +    }

Is there really no worry about multiple threads running this code at the same time?

[Jian Li]

It is now possible since we turn on v8 preemption although the chance is extremely small. I am working on a fix for this one. Thanks.

(In reply to comment #2)
> (From update of attachment 29384 [details] [review])
> LGTM
> 
> > +    // Do the one-time initialization.
> > +    static bool v8Initialized = false;
> > +    if (!v8Initialized) {
> > +        // Tells V8 not to call the default OOM handler, binding code will handle it.
> > +        v8::V8::IgnoreOutOfMemoryException();
> > +        v8::V8::SetFatalErrorHandler(reportFatalErrorInV8);
> > +        
> > +        v8::V8::AddMessageListener(handleConsoleMessage);
> > +        
> > +        v8Initialized = true;
> > +    }
> 
> Is there really no worry about multiple threads running this code at the same
> time?
> 

[Jian Li]

Created attachment 29404 [details]
Proposed Patch

I fixed the threading problem. Please take a look again. Thanks.

[Dmitry Titov]

Landed: http://trac.webkit.org/changeset/42452