content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.kotlinxcoroutines;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import kotlin.coroutines.CoroutineContext;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  public class KotlinCoroutinesInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("kotlinx.coroutines.CoroutineContextKt");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("newCoroutineContext")
              .and(takesArgument(0, named("kotlinx.coroutines.CoroutineScope")))
              .and(takesArgument(1, named("kotlin.coroutines.CoroutineContext"))),
          this.getClass().getName() + "$ContextAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ContextAdvice {
  
      @Advice.OnMethodEnter
      public static void enter(
          @Advice.Argument(value = 1, readOnly = false) CoroutineContext coroutineContext) {
        if (coroutineContext != null) {
          coroutineContext =
              KotlinCoroutinesInstrumentationHelper.addOpenTelemetryContext(coroutineContext);
        }
      }
    }
  }
  