[GPUProcess] Add basic GPUProcess crash handling for canvas

[Chris Dumez]

Add basic GPUProcess crash handling for canvas.

[Chris Dumez]

Created attachment 414098 [details]
Patch

[Simon Fraser (smfr)]

Comment on attachment 414098 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=414098&action=review

> Source/WebKit/WebProcess/GPU/graphics/RemoteImageBufferProxy.h:83
> +    float resolutionScale() const override { return m_resolutionScale; }

final?

> Source/WebKit/WebProcess/GPU/graphics/RemoteRenderingBackendProxy.cpp:66
> +    // Register itself as a MessageReceiver in the GPUProcessConnection.

Comment doesn't add anything.

> Source/WebKit/WebProcess/GPU/graphics/RemoteRenderingBackendProxy.cpp:70
> +    IPC::MessageReceiverMap& messageReceiverMap = connection.messageReceiverMap();

auto?

> Source/WebKit/WebProcess/GPU/graphics/RemoteRenderingBackendProxy.cpp:74
> +    send(Messages::GPUConnectionToWebProcess::CreateRenderingBackend(m_renderingBackendIdentifier), 0);

Comment doesn't add anything.

> Source/WebKit/WebProcess/GPU/graphics/RemoteRenderingBackendProxy.cpp:101
> +    connectToGPUProcess();
> +
> +    for (auto& pair : m_remoteResourceCacheProxy.imageBuffers()) {
> +        if (auto& baseImageBuffer = pair.value) {
> +            if (is<AcceleratedRemoteImageBufferProxy>(*baseImageBuffer))
> +                recreateImageBuffer(*this, downcast<AcceleratedRemoteImageBufferProxy>(*baseImageBuffer), pair.key, m_renderingBackendIdentifier);
> +            else
> +                recreateImageBuffer(*this, downcast<UnacceleratedRemoteImageBufferProxy>(*baseImageBuffer), pair.key, m_renderingBackendIdentifier);
> +        }
> +    }

It's weird to see this code in a "didClose" function. It would be nicer to move this to a "reestablishGPUConnection" function.

[Chris Dumez]

Created attachment 414103 [details]
Patch

[EWS]

Committed r269809: <https://trac.webkit.org/changeset/269809>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 414103 [details].

[Radar WebKit Bug Importer]

<rdar://problem/71392812>

[Darin Adler]

Comment on attachment 414103 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=414103&action=review

> Tools/TestWebKitAPI/Tests/WebKitCocoa/GPUProcess.mm:416
> +        RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);

Missing adoptCF here, so this bitmap context will leak.

[Chris Dumez]

(In reply to Darin Adler from comment #6)
> Comment on attachment 414103 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=414103&action=review
> 
> > Tools/TestWebKitAPI/Tests/WebKitCocoa/GPUProcess.mm:416
> > +        RetainPtr<CGContextRef> context = CGBitmapContextCreate(rgba, viewWidthInPixels, viewHeightInPixels, 8, 4 * viewWidthInPixels, colorSpace.get(), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
> 
> Missing adoptCF here, so this bitmap context will leak.

I had copied from an existing screenshot tests. Will fix existing tests and new tests via https://bugs.webkit.org/show_bug.cgi?id=218988. Thanks.