Old object sample description for types with length field

[galderz]

This is a follow-up enhancement to #5145.

Enhance old object sample event description to support types that have a length field. To achieve this, we would need to collect the field offset for each class during the image build and store it in the image heap. This information could then be used to provide the information on the types that have such a length field and provide equivalent description to that provided in HotSpot.

[kassifar]

Hello @galderz,

Thank you for your suggestion, we will take a look at it shortly.

[kassifar]

Hello @fniephaus, should I create an internal GR ticket for this ? Thank you.

[fniephaus]

@kassifar I'm not sure we need to. @galderz do you intend to work on this? Maybe to simplify, add the enhancement to #5145?

[galderz]

@fniephaus Yeah I plan to work on this, but I'd rather leave it as a follow up task because #5145 is big enough as it stands and I've had that PR open for several months now.

[galderz]

Also, this follow-up task is merely about the cosmetics of the description for a very small subset of types, so its priority is low.