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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
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* 2 along with this work; if not, write to the Free Software Foundation,
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*/
/*
* @test
* @bug 4858522
* @summary Basic unit test of HotspotClassLoadingMBean.getUnloadedClassSize()
* @author Steve Bohne
*/
/*
* This test is just a sanity check and does not check for the correct value.
*/
import sun.management.*;
public class GetUnloadedClassSize {
private static HotspotClassLoadingMBean mbean =
(HotspotClassLoadingMBean)ManagementFactoryHelper.getHotspotClassLoadingMBean();
// Careful with these values.
private static final long MIN_VALUE_FOR_PASS = 0;
private static final long MAX_VALUE_FOR_PASS = Long.MAX_VALUE;
private static boolean trace = false;
public static void main(String args[]) throws Exception {
if (args.length > 0 && args[0].equals("trace")) {
trace = true;
}
long value = mbean.getUnloadedClassSize();
if (trace) {
System.out.println("Unloaded class size (bytes): " + value);
}
if (value < MIN_VALUE_FOR_PASS || value > MAX_VALUE_FOR_PASS) {
throw new RuntimeException("Unloaded class size " +
"illegal value: " + value + " bytes " +
"(MIN = " + MIN_VALUE_FOR_PASS + "; " +
"MAX = " + MAX_VALUE_FOR_PASS + ")");
}
System.out.println("Test passed.");
}
}