com.github.ferstl.jarscan.NextInstructionFreqMojo Maven / Gradle / Ivy

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A Maven plugin that scans the project artifact and its dependencies for methods that cannot be inlined by the JIT compiler. It uses the JarScan utility from the JITWatch project to do that. See https://github.com/AdoptOpenJDK/jitwatch .

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package com.github.ferstl.jarscan;

import org.adoptopenjdk.jitwatch.jarscan.IJarScanOperation;
import org.adoptopenjdk.jitwatch.jarscan.nextinstruction.NextInstructionOperation;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.annotations.ResolutionScope;

/**
 * List the most popular next instruction for each bytecode instruction.
 *
 * @since 1.1
 */
@Mojo(
    name = "nextInstructionFreq",
    aggregator = false,
    defaultPhase = LifecyclePhase.VERIFY,
    requiresDependencyCollection = ResolutionScope.TEST,
    requiresDependencyResolution = ResolutionScope.TEST,
    requiresDirectInvocation = false,
    threadSafe = true)
public class NextInstructionFreqMojo extends AbstractJarScanMojo {

  /**
   * Limit to top n results per instruction.
   *
   * @since 1.1
   */
  @Parameter(property = "limit", defaultValue = "0")
  private int limit;

  @Override
  protected String validateMojoParameters() {
    if (this.limit < 0) {
      return "limit must be >= 0.";
    }

    return null;
  }

  @Override
  protected IJarScanOperation createOperation() {
    return new NextInstructionOperation(this.limit);
  }

}