test/gc/metaspace/TestMetaspaceCMSCancel.java

rev 11252 : 8026752: Cancel MetaspaceGC request for a CMS concurrent collection after GC
Reviewed-by:
rev 11253 : [mq]: whitebox

*** 18,68 ****
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
! import jdk.test.lib.ProcessTools;
! import jdk.test.lib.OutputAnalyzer;
! import java.util.ArrayList;
  
  /* @test TestMetaspaceCMSCancel
   * @bug 8026752
   * @summary Tests cancel of CMS concurrent cycle for Metaspace after a full GC
!  * @library /testlibrary
   * @modules java.base/jdk.internal.misc
   */
  public class TestMetaspaceCMSCancel {
  
      public static void main(String[] args) throws Exception {
          // Set a small MetaspaceSize so that a CMS concurrent collection will be
          // scheduled.  Set CMSWaitDuration to 5s so that the concurrent collection
          // start may be delayed.  It does not guarantee 5s before the start of the
          // concurrent collection but does increase the probability that it will
          // be started later.  System.gc() is used to invoke a full collection.  Set
          // ExplicitGCInvokesConcurrent to off so it is a STW collection.
!         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseConcMarkSweepGC",
                                                                    "-XX:MetaspaceSize=2m",
                                                                    "-XX:CMSWaitDuration=5000",
                                                                    "-XX:-ExplicitGCInvokesConcurrent",
                                                                    "-Xlog:gc*=debug",
                                                                    MetaspaceGCTest.class.getName());
  
          OutputAnalyzer output = new OutputAnalyzer(pb.start());
- 
          output.shouldNotContain("Concurrent Reset");
          output.shouldHaveExitValue(0);
      }
  
      static class MetaspaceGCTest {
          public static void main(String [] args) {
              System.gc();
!             while (true) {
!                 try {
!                     Thread.sleep(20000);
!                     return;
!                 } catch (InterruptedException e) {
!                     continue;
!                 }
!             }
          }
      }
  }
--- 18,70 ----
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
! import jdk.test.lib.process.ProcessTools;
! import jdk.test.lib.process.OutputAnalyzer;
! import jdk.test.lib.Asserts;
! import sun.hotspot.WhiteBox;
  
  /* @test TestMetaspaceCMSCancel
   * @bug 8026752
   * @summary Tests cancel of CMS concurrent cycle for Metaspace after a full GC
!  * @library /testlibrary /test/lib /test/lib/share/classes
   * @modules java.base/jdk.internal.misc
+  * @build TestMetaspaceCMSCancel
+  * @run main ClassFileInstaller sun.hotspot.WhiteBox
+  * @run main/othervm TestMetaspaceCMSCancel
   */
+ 
+ 
  public class TestMetaspaceCMSCancel {
  
      public static void main(String[] args) throws Exception {
          // Set a small MetaspaceSize so that a CMS concurrent collection will be
          // scheduled.  Set CMSWaitDuration to 5s so that the concurrent collection
          // start may be delayed.  It does not guarantee 5s before the start of the
          // concurrent collection but does increase the probability that it will
          // be started later.  System.gc() is used to invoke a full collection.  Set
          // ExplicitGCInvokesConcurrent to off so it is a STW collection.
!         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xbootclasspath/a:.",
!                                                                   "-XX:+UnlockDiagnosticVMOptions",
!                                                                   "-XX:+WhiteBoxAPI",
!                                                                   "-XX:+UseConcMarkSweepGC",
                                                                    "-XX:MetaspaceSize=2m",
                                                                    "-XX:CMSWaitDuration=5000",
                                                                    "-XX:-ExplicitGCInvokesConcurrent",
                                                                    "-Xlog:gc*=debug",
                                                                    MetaspaceGCTest.class.getName());
  
          OutputAnalyzer output = new OutputAnalyzer(pb.start());
          output.shouldNotContain("Concurrent Reset");
          output.shouldHaveExitValue(0);
      }
  
      static class MetaspaceGCTest {
          public static void main(String [] args) {
+             WhiteBox wb = WhiteBox.getWhiteBox();
              System.gc();
!             Asserts.assertFalse(wb.metaspaceShouldConcurrentCollect());
          }
      }
  }