[WHLSL] Implement the recursion checker

[Myles C. Maxfield]

[WHLSL] Implement the recursion checker

[Myles C. Maxfield]

Created attachment 359138 [details]
Patch

[Myles C. Maxfield]

Comment on attachment 359138 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=359138&action=review

> Source/WebCore/Modules/webgpu/WHLSL/WHLSLRecursionChecker.cpp:62
> +    void visit(AST::FunctionDefinition& functionDefinition) override
> +    {
> +        auto addResult = m_visitingSet.add(&functionDefinition);
> +        if (!addResult.isNewEntry) {
> +            setError();
> +            return;
> +        }
> +
> +        Visitor::visit(functionDefinition);
> +
> +        auto success = m_visitingSet.remove(&functionDefinition);
> +        ASSERT_UNUSED(success, success);
> +    }
> +
> +    void visit(AST::CallExpression& callExpression) override
> +    {
> +        ASSERT(callExpression.function());
> +        Visitor::visit(*callExpression.function());
> +    }

These can be private.

[Darin Adler]

Comment on attachment 359138 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=359138&action=review

> Source/WebCore/Modules/webgpu/WHLSL/WHLSLRecursionChecker.cpp:42
> +    RecursionChecker() = default;
> +
> +    virtual ~RecursionChecker() = default;

These can be omitted because this is what will be generated if you don’t write anything.

[EWS Watchlist]

Comment on attachment 359138 [details]
Patch

Attachment 359138 [details] did not pass mac-debug-ews (mac):
Output: https://webkit-queues.webkit.org/results/10755536

New failing tests:
compositing/backing/animate-into-view.html

[EWS Watchlist]

Created attachment 359143 [details]
Archive of layout-test-results from ews115 for mac-highsierra

The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews115  Port: mac-highsierra  Platform: Mac OS X 10.13.6

[Myles C. Maxfield]

Created attachment 359225 [details]
Patch

[Saam Barati]

Comment on attachment 359225 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=359225&action=review

> Source/WebCore/Modules/webgpu/WHLSL/WHLSLRecursionChecker.cpp:53
> +        auto success = m_visitingSet.remove(&functionDefinition);

Each AST node representing a call to a function “foo” points to the same memory location?

[Myles C. Maxfield]

Comment on attachment 359225 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=359225&action=review

>> Source/WebCore/Modules/webgpu/WHLSL/WHLSLRecursionChecker.cpp:53
>> +        auto success = m_visitingSet.remove(&functionDefinition);
> 
> Each AST node representing a call to a function “foo” points to the same memory location?

Yes. Each function definition is a single object in the AST, and all calls to it have a .function() that points to it.

[Myles C. Maxfield]

Committed r240096: <https://trac.webkit.org/changeset/240096>

[Radar WebKit Bug Importer]

<rdar://problem/47335051>