exclude zio internal runnable from context propagation

Author: amarziali

dd-java-agent/instrumentation/zio/zio-2.0/src/main/java/datadog/trace/instrumentation/zio/v2_0/FiberContext.java

@@ -41,6 +41,9 @@ public void onSuspend() {
       this.oldState.activate();
       this.oldState = null;
     }
+    if (this.scope != null) {
+      this.scope.close();
+    }
   }
 
   public void onResume() {

dd-java-agent/instrumentation/zio/zio-2.0/src/main/java/datadog/trace/instrumentation/zio/v2_0/ZioRuntimeInstrumentation.java

@@ -5,17 +5,21 @@
 import static net.bytebuddy.matcher.ElementMatchers.isMethod;
 
 import com.google.auto.service.AutoService;
+import datadog.trace.agent.tooling.ExcludeFilterProvider;
 import datadog.trace.agent.tooling.Instrumenter;
 import datadog.trace.bootstrap.ContextStore;
 import datadog.trace.bootstrap.InstrumentationContext;
+import datadog.trace.bootstrap.instrumentation.java.concurrent.ExcludeFilter;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.Map;
 import net.bytebuddy.asm.Advice;
 import zio.Fiber;
 import zio.Supervisor;
 
 @AutoService(Instrumenter.class)
 public class ZioRuntimeInstrumentation extends Instrumenter.Tracing
-    implements Instrumenter.ForSingleType {
+    implements Instrumenter.ForSingleType, ExcludeFilterProvider {
 
   public ZioRuntimeInstrumentation() {
     super("zio.experimental");
@@ -47,6 +51,12 @@ public Map<String, String> contextStore() {
     return singletonMap("zio.Fiber$Runtime", packageName + ".FiberContext");
   }
 
+  @Override
+  public Map<ExcludeFilter.ExcludeType, ? extends Collection<String>> excludedClasses() {
+    return Collections.singletonMap(
+        ExcludeFilter.ExcludeType.RUNNABLE, Collections.singletonList("zio.internal.FiberRuntime"));
+  }
+
   public static final class DefaultSupervisor {
     @Advice.OnMethodExit(suppress = Throwable.class)
     public static void onExit(@Advice.Return(readOnly = false) Supervisor<?> supervisor) {