jdk-24/test/hotspot/jtreg/runtime/CommandLine/PrintTouchedMethods.java

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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 8025692
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @library /test/lib
 * @compile TestLogTouchedMethods.java PrintTouchedMethods.java
 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+LogTouchedMethods PrintTouchedMethods
 */

import java.io.File;
import java.util.List;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.JDKToolFinder;

public class PrintTouchedMethods {

    public static void main(String args[]) throws Exception {
      ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
          "-XX:-UnlockDiagnosticVMOptions",
          "-XX:+LogTouchedMethods",
          "-XX:+PrintTouchedMethodsAtExit",
          "TestLogTouchedMethods");

      // UnlockDiagnostic turned off, should fail
      OutputAnalyzer output = new OutputAnalyzer(pb.start());
      output.shouldContain("Error: VM option 'LogTouchedMethods' is diagnostic and must be enabled via -XX:+UnlockDiagnosticVMOptions.");
      output.shouldContain("Error: Could not create the Java Virtual Machine.");

      pb = ProcessTools.createJavaProcessBuilder(
          "-XX:+UnlockDiagnosticVMOptions",
          "-XX:+LogTouchedMethods",
          "-XX:+PrintTouchedMethodsAtExit",
          "TestLogTouchedMethods");
      output = new OutputAnalyzer(pb.start());
      // check order:
      // 1 "# Method::print_touched_methods version 1" is the first in first line
      // 2 should contain TestLogMethods.methodA:()V
      // 3 should not contain TestLogMethods.methodB:()V
      // Repeat above for another run with -Xint
      List<String> lines = output.asLines();

      if (lines.size() < 1) {
        throw new Exception("Empty output");
      }

      String first = lines.get(0);
      if (!first.equals("# Method::print_touched_methods version 1")) {
        throw new Exception("First line mismatch");
      }

      output.shouldContain("TestLogTouchedMethods.methodA:()V");
      output.shouldNotContain("TestLogTouchedMethods.methodB:()V");
      output.shouldHaveExitValue(0);

      pb = ProcessTools.createJavaProcessBuilder(
          "-XX:+UnlockDiagnosticVMOptions",
          "-Xint",
          "-XX:+LogTouchedMethods",
          "-XX:+PrintTouchedMethodsAtExit",
          "TestLogTouchedMethods");
      output = new OutputAnalyzer(pb.start());
      lines = output.asLines();

      if (lines.size() < 1) {
        throw new Exception("Empty output");
      }

      first = lines.get(0);
      if (!first.equals("# Method::print_touched_methods version 1")) {
        throw new Exception("First line mismatch");
      }

      output.shouldContain("TestLogTouchedMethods.methodA:()V");
      output.shouldNotContain("TestLogTouchedMethods.methodB:()V");
      output.shouldHaveExitValue(0);

      pb = ProcessTools.createJavaProcessBuilder(
          "-XX:+UnlockDiagnosticVMOptions",
          "-Xint",
          "-XX:+LogTouchedMethods",
          "-XX:+PrintTouchedMethodsAtExit",
          "-XX:-TieredCompilation",
          "TestLogTouchedMethods");
      output = new OutputAnalyzer(pb.start());
      lines = output.asLines();

      if (lines.size() < 1) {
        throw new Exception("Empty output");
      }

      first = lines.get(0);
      if (!first.equals("# Method::print_touched_methods version 1")) {
        throw new Exception("First line mismatch");
      }

      output.shouldContain("TestLogTouchedMethods.methodA:()V");
      output.shouldNotContain("TestLogTouchedMethods.methodB:()V");
      output.shouldHaveExitValue(0);

      // Test jcmd PrintTouchedMethods VM.print_touched_methods
      String pid = Long.toString(ProcessTools.getProcessId());
      pb = new ProcessBuilder();
      pb.command(new String[] {JDKToolFinder.getJDKTool("jcmd"), pid, "VM.print_touched_methods"});
      output = new OutputAnalyzer(pb.start());
      try {
        output.shouldContain("PrintTouchedMethods.main:([Ljava/lang/String;)V");
      } catch (RuntimeException e) {
        output.shouldContain("Unknown diagnostic command");
      }
  }
}