hotspot/test/runtime/NMT/PrintNMTStatistics.java

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/*
 * @test
 * @key nmt regression
 * @bug 8005936 8058606
 * @summary Verify PrintNMTStatistics on normal JVM exit for detail and summary tracking level
 * @modules java.base/jdk.internal.misc
 * @library /test/lib
 */

import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;

public class PrintNMTStatistics {

    public static void main(String args[]) throws Exception {

    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
      "-XX:+UnlockDiagnosticVMOptions",
      "-XX:+PrintNMTStatistics",
      "-XX:NativeMemoryTracking=detail",
      "-version");

    OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
    output_detail.shouldContain("Virtual memory map:");
    output_detail.shouldContain("Details:");
    output_detail.shouldNotContain("error");
    output_detail.shouldHaveExitValue(0);

    // Make sure memory reserved for Module processing is recorded.
    output_detail.shouldContain(" Module (reserved=");

    ProcessBuilder pb1 = ProcessTools.createJavaProcessBuilder(
      "-XX:+UnlockDiagnosticVMOptions",
      "-XX:+PrintNMTStatistics",
      "-XX:NativeMemoryTracking=summary",
      "-version");

    OutputAnalyzer output_summary = new OutputAnalyzer(pb1.start());
    output_summary.shouldContain("Java Heap (reserved=");
    output_summary.shouldNotContain("Virtual memory map:");
    output_summary.shouldNotContain("Details:");
    output_summary.shouldNotContain("error");
    output_summary.shouldHaveExitValue(0);
    }
}