sending a binary object as attribute-value?

[mahtoji]

Is there a way to send a binary object (protobuf) as a value for an attribute, and then outside the program being traced, convert first the binary object to key value pairs.

What I am looking for is for hooks where I can insert my code to convert binary globs in to additional (attribute, value) pairs that I can use to filter and analyze my traces. I however want to do this offline. I do not want to pay the cost of converting big binary objects in to attribute-value pairs inline in my code because my processor & memory are very small. It is an embedded software environment.