TestPlatformIsTieredSupported.java

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import com.oracle.java.testlibrary.Asserts;
import com.oracle.java.testlibrary.Platform;
import sun.hotspot.WhiteBox;

/**
 * @test
 * @summary Verifies that Platform::isTieredSupported returns correct value.
 * @library /testlibrary /../../test/lib
 * @modules java.base/sun.misc
 *          java.management
 * @build TestPlatformIsTieredSupported
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:+TieredCompilation
 *                   TestPlatformIsTieredSupported
 */
public class TestPlatformIsTieredSupported {
    public static void main(String args[]) {
        WhiteBox whiteBox = WhiteBox.getWhiteBox();
        boolean tieredCompilation = whiteBox.getBooleanVMFlag(
                "TieredCompilation");
        Asserts.assertEQ(Platform.isTieredSupported(), tieredCompilation,
                "Platform::isTieredSupported should report the same value as "
                        + "TieredCompilation flag's value when "
                        + "+TieredCompilation was explicitly passed to JVM.");
    }
}