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Instrumentation of Java libraries using OpenTelemetry.

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/*
 * Copyright The OpenTelemetry Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package io.opentelemetry.javaagent.tooling.instrumentation.indy;

import java.lang.invoke.MethodHandles;

/**
 * This class is injected into every {@link InstrumentationModuleClassLoader} so that the bootstrap
 * can use a {@link MethodHandles.Lookup} with a lookup class from within the {@link
 * InstrumentationModuleClassLoader}, instead of calling {@link MethodHandles#lookup()} which uses
 * the caller class as the lookup class.
 *
 * This circumvents a nasty JVM bug that's described here. The error is reproduced in
 * {@code InstrumentationModuleClassLoaderTest}
 */
public class LookupExposer {

  private LookupExposer() {}

  public static MethodHandles.Lookup getLookup() {
    return MethodHandles.lookup();
  }
}