Bug 105725 – Web Inspector: Native Memory Instrumentation: propagate ownership type to the serialized heap graph

• Component: Web Inspector (Deprecated)
• Status: RESOLVED FIXED

[Ilya Tikhonovsky]

We are collecting information about edges but do not report the edge type.
But we could calculate edge types almost automatically.

Actually WebCore uses three edge types. 
ByPointer usually means a weak reference.
ByOwnPtr means a single strong reference.
ByRefPtr means one or more strong references.

In some cases a pointer to an object could be a strong reference. I hope it is relatively rare case in WebCore.
If it is possible I'll replace such pointer with OwnPtr. If it is not possible, I'll introduce addStrongPointerMember method.

[Ilya Tikhonovsky]

Created attachment 180675 [details]
Patch

[Build Bot]

Comment on attachment 180675 [details]
Patch

Attachment 180675 [details] did not pass mac-ews (mac):
Output: http://queues.webkit.org/results/15496533

[Yury Semikhatsky]

Comment on attachment 180675 [details]
Patch

You'll also need to update export symbols I think.

View in context: https://bugs.webkit.org/attachment.cgi?id=180675&action=review

> Source/WTF/wtf/MemoryInstrumentation.h:49
> +    ByPointer,

Let's rename MemoryOwningType to HeapGraphEdgeType and the values to PointerEdge, ReferenceEdge, OwnPtrEdge etc.(I'd prefer simply RefPtr, Pointer etc. but those would conflict with the classes).

> Source/WebCore/inspector/HeapGraphSerializer.cpp:68
> +        : m_refType(0)

I'd leave it as m_type.

> Source/WebCore/inspector/HeapGraphSerializer.cpp:89
> +    memset(m_refTypes, 0, sizeof(m_refTypes));

m_refTypes -> m_edgeTypes.

[Ilya Tikhonovsky]

Created attachment 180698 [details]
Patch

[Ilya Tikhonovsky]

(In reply to comment #3)
> (From update of attachment 180675 [details])
> You'll also need to update export symbols I think.
> 
> View in context: https://bugs.webkit.org/attachment.cgi?id=180675&action=review
> 
> > Source/WTF/wtf/MemoryInstrumentation.h:49
> > +    ByPointer,
> 
> Let's rename MemoryOwningType to HeapGraphEdgeType and the values to PointerEdge, ReferenceEdge, OwnPtrEdge etc.(I'd prefer simply RefPtr, Pointer etc. but those would conflict with the classes).


MemoryOwningType -> MemberType
ByPointer -> PointerMember,
ByReference -> ReferenceMember,
new type OwnPtrMember,
new type RefPtrMember,
new type LastMemberTypeEntry


> 
> > Source/WebCore/inspector/HeapGraphSerializer.cpp:68
> > +        : m_refType(0)
> 
> I'd leave it as m_type.

done.

> 
> > Source/WebCore/inspector/HeapGraphSerializer.cpp:89
> > +    memset(m_refTypes, 0, sizeof(m_refTypes));
> 
> m_refTypes -> m_edgeTypes.

done.

[Ilya Tikhonovsky]

Committed r138452: <http://trac.webkit.org/changeset/138452>