diff test/gc/concurrentMarkSweep/SystemGCOnForegroundCollector.java @ 10244:06ab37f08701

8013184: CMS: Call reset_after_compaction() only if a compaction has been done Reviewed-by: mgerdin, johnc, tschatzl
author jmasa
date Wed, 08 May 2013 17:12:52 -0700
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/gc/concurrentMarkSweep/SystemGCOnForegroundCollector.java	Wed May 08 17:12:52 2013 -0700
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * 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.
+ *
+ * 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.
+ */
+
+/**
+ * @test SystemGCOnForegroundCollector
+ * @summary CMS: Call reset_after_compaction() only if a compaction has been done
+ * @bug 8013184
+ * @key gc
+ * @key regression
+ * @library /testlibrary
+ * @run main/othervm SystemGCOnForegroundCollector
+ * @author jon.masamitsu@oracle.com
+ */
+
+import com.oracle.java.testlibrary.*;
+
+public class SystemGCOnForegroundCollector {
+  public static void main(String args[]) throws Exception {
+
+    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+      "-showversion",
+      "-XX:+UseConcMarkSweepGC",
+      "-XX:MaxTenuringThreshold=1",
+      "-XX:-UseCMSCompactAtFullCollection",
+      ThreePlusMSSystemGC.class.getName()
+      );
+
+    OutputAnalyzer output = new OutputAnalyzer(pb.start());
+
+    output.shouldNotContain("error");
+
+    output.shouldHaveExitValue(0);
+  }
+
+  static class ThreePlusMSSystemGC {
+    public static void main(String [] args) {
+      // From running this test 3 System.gc() were always
+      // enough to see the failure but the cause of the failure
+      // depends on how objects are allocated in the CMS generation
+      // which is non-deterministic.  Use 30 iterations for a more
+      // reliable test.
+      for (int i = 0; i < 30; i++) {
+        System.gc();
+      }
+    }
+  }
+}