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[tracecompass-dev] Parsing non standard data

Hi,

 

I am trying to make XML views for LTTng from CoreCLR. While for most events payload is being loaded correctly, some seems to have unparsed data. For example, DotNETRuntime:GCGenerationRange have Contents with all fields parsed:

 

Timestamp         Channel               CPU       Event type          Contents             Binary Location Function Location            Source Location

10:35:41.990 062 403    channel0_0        0             DotNETRuntime:GCGenerationRange    Generation=2, RangeStart=140491869908992, RangeUsedLength=24, RangeReservedLength=24, ClrInstanceID=0, context._vpid=39237, context._vtid=39254, context._procname=dotnet                                                                            

So I am able to draw XML XY chart based on, for example, RangeUsedLength.

 

But for some events there are only unparsed, __data related fields:

 

Timestamp         Channel               CPU       Event type          Contents             Binary Location Function Location            Source Location

10:35:41.990 066 003    channel0_0        0             DotNETRuntime:GCHeapStats_V1           length=94, ___data___length=94, __data__=[120, 136, 28, 0, 0, 0, 0, 0, 176, 254, 16, 0, 0, 0, 0, 0, 240, 10, 17, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 170, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 242, 91, 1, 0, 0, 0, 0, 0, 39, 1, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 11, 0, 0, 0, 165, 0, 0, 0, 0, 0], context._vpid=39237, context._vtid=39254, context._procname=dotnet                                     

I know LTTng USG Trace parsing is used here but I am not sure if it is possible to extend it somehow to get very valuable fields hidden in __data__ field?

 

Konrad Kokosa


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