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 *

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 * published by the Free Software Foundation.

 *

 * 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).

 *

 * You should have received a copy of the GNU General Public License version

 * 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 TestDieDefault

 * @summary Epsilon GC should die on heap exhaustion

 * @library /test/lib

 * @run main TestDieDefault

 */

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

public class TestDieDefault extends AbstractEpsilonTest {

  public static void passWith(String... args) throws Exception {

    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args);

    OutputAnalyzer out = new OutputAnalyzer(pb.start());

    out.shouldNotContain("OutOfMemoryError");

    out.shouldHaveExitValue(0);

  }

  public static void failWith(String... args) throws Exception {

    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args);

    OutputAnalyzer out = new OutputAnalyzer(pb.start());

    out.shouldContain("OutOfMemoryError");

    if (out.getExitValue() == 0) {

      throw new IllegalStateException("Should have failed with non-zero exit code");

    }

  }

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

    if (!isEpsilonEnabled()) return;

    passWith("-Xmx128m",

             "-XX:+UnlockExperimentalVMOptions",

             "-XX:+UseEpsilonGC",

             "-Dcount=1",

             TestDieDefault.Workload.class.getName());

    failWith("-Xmx128m",

             "-XX:+UnlockExperimentalVMOptions",

             "-XX:+UseEpsilonGC",

             TestDieDefault.Workload.class.getName());

    failWith("-Xmx128m",

             "-Xint",

             "-XX:+UnlockExperimentalVMOptions",

             "-XX:+UseEpsilonGC",

             TestDieDefault.Workload.class.getName());

    failWith("-Xmx128m",

             "-Xbatch",

             "-Xcomp",

             "-XX:+UnlockExperimentalVMOptions",

             "-XX:+UseEpsilonGC",

             TestDieDefault.Workload.class.getName());

    failWith("-Xmx128m",

             "-Xbatch",

             "-Xcomp",

             "-XX:TieredStopAtLevel=1",

             "-XX:+UnlockExperimentalVMOptions",

             "-XX:+UseEpsilonGC",

             TestDieDefault.Workload.class.getName());

    failWith("-Xmx128m",

             "-Xbatch",

             "-Xcomp",

             "-XX:TieredStopAtLevel=4",

             "-XX:+UnlockExperimentalVMOptions",

             "-XX:+UseEpsilonGC",

             TestDieDefault.Workload.class.getName());

  }

  public static class Workload {

    static int COUNT = Integer.getInteger("count", 1_000_000_000); // ~24 GB allocation

    static volatile Object sink;

    public static void main(String... args) {

      for (int c = 0; c < COUNT; c++) {

        sink = new Object();

      }

    }

  }

}