/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* 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
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
* @test
* @bug 4929401
* @summary ThreadMXBean.getThreadCpuTime() throws IllegalArgumentException
* if id <= 0 and returns -1 if the thread doesn't exist.
* @author Mandy Chung
*
* @run main InvalidThreadID
*/
import java.lang.management.ThreadMXBean;
import java.lang.management.ManagementFactory;
public class InvalidThreadID {
public static void main(String argv[]) {
ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
int cnt = 0;
long [] idArr = {0, -1, -2, (Long.MIN_VALUE + 1), Long.MIN_VALUE};
if (mbean.isThreadCpuTimeSupported()) {
for (int i = 0; i < idArr.length; i++) {
try {
mbean.getThreadCpuTime(idArr[i]);
System.out.println("Test failed. IllegalArgumentException" +
" expected for ID = " + idArr[i]);
} catch (IllegalArgumentException iae) {
cnt++;
}
}
if (cnt != idArr.length) {
throw new RuntimeException("Unexpected number of " +
"IllegalArgumentException = " + cnt +
" expected = " + idArr.length);
}
// CPU time for a non-existence thread
long time = mbean.getThreadCpuTime(999999);
if (time < 0 && time != -1) {
throw new RuntimeException("Cpu time for thread 999999" +
" is invalid = " + time + " expected to be -1.");
}
}
System.out.println("Test passed.");
}
}