Support/show UST Context Fields (#81)

* Support/show UST Context Fields such as vtid, vpid, pthread_id, etc in Generic Events - https://lttng.org/man/3/lttng-ust/v2.7/#section-context

Author: ivberg

LTTngDataExtensions/DataOutputTypes/LTTngGenericEvent.cs

@@ -105,9 +105,16 @@ public LTTngGenericEvent(LTTngEvent data, LTTngContext context)
             // approach. We could probably generate a type from each event descriptor, and convert to that type.
             //
 
-            this.FieldValues = new List<string>(payload.Fields.Count);
+            this.FieldNames = new List<string>(payload.Fields.Count + data.StreamDefinedEventContext.Fields.Count);
+            this.FieldValues = new List<string>(payload.Fields.Count + data.StreamDefinedEventContext.Fields.Count);
+            foreach (var field in data.StreamDefinedEventContext.Fields)
+            {
+                this.FieldNames.Add(field.FieldName.ToString());
+                this.FieldValues.Add(field.GetValueAsString());
+            }
             foreach (var field in payload.Fields)
             {
+                this.FieldNames.Add(field.FieldName.ToString());
                 this.FieldValues.Add(field.GetValueAsString());
             }
         }
@@ -123,6 +130,6 @@ public LTTngGenericEvent(LTTngEvent data, LTTngContext context)
         public uint DiscardedEvents { get; }
 
         public readonly List<string> FieldValues;
-        public List<string> FieldNames => this.kind.FieldNames;
+        public readonly List<string> FieldNames;
     }
 }

LTTngDataExtensions/LTTngDataExtensions.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>netstandard2.1</TargetFramework>
-	<Version>1.2.2</Version>
+	<Version>1.2.3</Version>
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <Authors>Microsoft</Authors>
     <Company>Microsoft Corp.</Company>