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/*
* @test
* @bug 8059100
* @summary Test that you can decrease NMT tracking level but not increase it.
* @key nmt
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @build sun.hotspot.WhiteBox
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail ChangeTrackingLevel
*/
import sun.hotspot.WhiteBox;
public class ChangeTrackingLevel {
public static WhiteBox wb = WhiteBox.getWhiteBox();
public static void main(String args[]) throws Exception {
boolean testChangeLevel = wb.NMTChangeTrackingLevel();
if (testChangeLevel) {
System.out.println("NMT level change test passed.");
} else {
// it also fails if the VM asserts.
throw new RuntimeException("NMT level change test failed");
}
}
};