--- /dev/null	Mon Mar 18 05:13:20 2013
+++ new/test/gc/6941923/Test6941923.java	Mon Mar 18 05:13:19 2013
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2012, 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 Test6941923.java
+ * @bug 6941923
+ * @summary test new added flags for gc log rotation
+ * @library /testlibrary
+ * @run main/othervm/timeout=600 Test6941923
+ * 
+ */
+import com.oracle.java.testlibrary.*;
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.ArrayList;
+
+class GarbageGenerator {
+    
+    static int cap = 20000;
+    
+    // don't let C2 make any optimization    
+    public static ArrayList< byte[]> tmpList = new ArrayList(cap);
+
+    public static void main(String[] args) throws Exception {
+
+        long limit = Long.parseLong(args[0]) * 60L * 1000L;   // minutes        
+        int fix_size = 2048;
+        int loop = 0;
+        long time1 = System.currentTimeMillis();
+        long time2 = System.currentTimeMillis();
+        while (time2 - time1 < limit) {            
+            byte[] g = new byte[fix_size];
+            tmpList.add(g);
+            loop++;
+            if (loop > cap) {
+                tmpList = null;
+                cap *= 2;
+                if (cap > 80000) {
+                    cap = 80000;
+                }
+                tmpList = new ArrayList(cap);
+            }
+            time2 = System.currentTimeMillis();
+        }
+
+        
+        System.out.print("\r... " + (time2 - time1) / 1000 + " seconds");
+
+    }
+}
+
+public class Test6941923 {
+
+    static final File currentDirectory = new File(System.getProperty("user.dir"));
+    static final String logFileName = "test.log";
+    static final int logFileSizeK = 16;
+    static FilenameFilter logFilter = new FilenameFilter() {
+        @Override
+        public boolean accept(File dir, String name) {
+            return name.startsWith(logFileName);
+        }
+    };
+
+    public static void cleanLogs() {
+        for (File log : currentDirectory.listFiles(logFilter)) {
+            if (!log.delete()) {
+                throw new Error("Unable to delete " + log.getAbsolutePath());
+            }
+        }
+    }
+
+    public static void runTest(int numberOfFiles) throws Exception {
+
+        String minutesToRun = String.valueOf(numberOfFiles);
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-cp", System.getProperty("java.class.path"), "-Xloggc:" + logFileName,
+                "-XX:+PrintGC", "-XX:+PrintGCDetails", "-XX:+UseGCLogFileRotation", "-XX:NumberOfGCLogFiles=" + numberOfFiles,
+                "-XX:GCLogFileSize=" + logFileSizeK + "K", "-Xmx128M", GarbageGenerator.class.getName(), minutesToRun);
+        Process process = pb.start();
+        int result = process.waitFor();
+        if (result != 0) {
+            throw new Error("Unexpected exit code = " + result);
+        }
+        File[] logs = currentDirectory.listFiles(logFilter);
+        int smallFilesNumber = 0;
+        for (File log : logs) {
+            if (log.length() < logFileSizeK * 1024) {
+                smallFilesNumber++;
+            }
+        }
+        if (smallFilesNumber > 1) {
+            throw new Error("There should maximum one log with size < " + logFileSizeK + "K");
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        cleanLogs();
+        runTest(1);
+        cleanLogs();
+        runTest(3);
+        cleanLogs();
+    }
+}
--- old/test/gc/6941923/test6941923.sh	Mon Mar 18 05:13:22 2013
+++ /dev/null	Mon Mar 18 05:13:22 2013
@@ -1,179 +0,0 @@
-##
-## @test @(#)test6941923.sh
-## @bug 6941923 
-## @summary test new added flags for gc log rotation 
-## @author yqi 
-## @run shell test6941923.sh
-##
-
-## skip on windows
-OS=`uname -s`
-case "$OS" in
-  SunOS | Linux | Darwin )
-    NULL=/dev/null
-    PS=":"
-    FS="/"
-    ;;
-  Windows_* | CYGWIN_* )
-    echo "Test skipped for Windows"
-    exit 0 
-    ;;
-  * )
-    echo "Unrecognized system!"
-    exit 1;
-    ;;
-esac
-
-if [ "${JAVA_HOME}" = "" ]
-then
-  echo "JAVA_HOME not set"
-  exit 0
-fi
-
-$JAVA_HOME/bin/java ${TESTVMOPTS} -version > $NULL 2>&1
-
-if [ $? != 0 ]; then
-  echo "Wrong JAVA_HOME? JAVA_HOME: $JAVA_HOME"
-  exit $?
-fi
-
-# create a small test case
-testname="Test"
-if [ -e ${testname}.java ]; then
-  rm -rf ${testname}.*
-fi
-
-cat >> ${testname}.java << __EOF__
-import java.util.Vector;
-
-public class Test implements Runnable
-{
-  private boolean _should_stop = false;
-
-  public static void main(String[] args) throws Exception {
-
-    long limit = Long.parseLong(args[0]) * 60L * 1000L;   // minutes
-    Test t = new Test();
-    t.set_stop(false);
-    Thread thr = new Thread(t);
-    thr.start();
-
-    long time1 = System.currentTimeMillis();
-    long time2 = System.currentTimeMillis();
-    while (time2 - time1 < limit) {
-      try {
-        Thread.sleep(2000); // 2 seconds
-      }
-      catch(Exception e) {}
-      time2 = System.currentTimeMillis();
-      System.out.print("\r... " + (time2 - time1)/1000 + " seconds");
-    }
-    System.out.println();
-    t.set_stop(true);
-  }
-  public void set_stop(boolean value) { _should_stop = value; }
-  public void run() {
-    int cap = 20000;
-    int fix_size = 2048;
-    int loop = 0;
-    Vector< byte[] > v = new Vector< byte[] >(cap);
-    while(!_should_stop) {
-      byte[] g = new byte[fix_size];
-      v.add(g);
-      loop++;
-      if (loop > cap) {
-         v = null;
-         cap *= 2;
-         if (cap > 80000) cap = 80000;
-         v = new Vector< byte[] >(cap);
-      }
-    }
-  }
-}
-__EOF__
-
-msgsuccess="succeeded"
-msgfail="failed"
-gclogsize="16K"
-filesize=$((16*1024))
-$JAVA_HOME/bin/javac ${testname}.java > $NULL 2>&1
-
-if [ $? != 0 ]; then
-  echo "$JAVA_HOME/bin/javac ${testname}.java $fail"
-  exit -1
-fi
-
-# test for 2 minutes, it will complete circulation of gc log rotation
-tts=2
-logfile="test.log"
-hotspotlog="hotspot.log"
-
-if [ -e $logfile  ]; then
-  rm -rf $logfile
-fi
-
-#also delete $hotspotlog if it exists
-if [ -f $hotspotlog ]; then 
-  rm -rf $hotspotlog
-fi
-
-options="-Xloggc:$logfile -XX:+UseConcMarkSweepGC -XX:+PrintGC -XX:+PrintGCDetails -XX:+UseGCLogFileRotation  -XX:NumberOfGCLogFiles=1 -XX:GCLogFileSize=$gclogsize"
-echo "Test gc log rotation in same file, wait for $tts minutes ...."
-$JAVA_HOME/bin/java ${TESTVMOPTS} $options $testname $tts
-if [ $? != 0 ]; then
-  echo "$msgfail"
-  exit -1
-fi
-
-# rotation file will be $logfile.0 
-if [ -f $logfile.0 ]; then
-  outfilesize=`ls -l $logfile.0 | awk '{print $5 }'`
-  if [ $((outfilesize)) -ge $((filesize)) ]; then
-    echo $msgsuccess
-  else
-    echo $msgfail
-  fi
-else 
-  echo $msgfail
-  exit -1
-fi
-
-# delete log file 
-rm -rf $logfile.0
-if [ -f $hotspotlog ]; then
-  rm -rf $hotspotlog
-fi
-
-#multiple log files
-numoffiles=3
-options="-Xloggc:$logfile -XX:+UseConcMarkSweepGC -XX:+PrintGC -XX:+PrintGCDetails -XX:+UseGCLogFileRotation  -XX:NumberOfGCLogFiles=$numoffiles -XX:GCLogFileSize=$gclogsize"
-echo "Test gc log rotation in $numoffiles files, wait for $tts minutes ...."
-$JAVA_HOME/bin/java ${TESTVMOPTS} $options $testname $tts
-if [ $? != 0 ]; then
-  echo "$msgfail"
-  exit -1
-fi
-
-atleast=0    # at least size of numoffile-1 files >= $gclogsize
-tk=0
-while [ $(($tk)) -lt $(($numoffiles)) ]
-do
-  if [ -f $logfile.$tk ]; then
-    outfilesize=`ls -l $logfile.$tk | awk '{ print $5 }'`
-    if [ $(($outfilesize)) -ge $(($filesize)) ]; then
-      atleast=$((atleast+1))
-    fi
-  fi
-  tk=$((tk+1))
-done
-
-rm -rf $logfile.*
-rm -rf $testname.*
-rm -rf $hotspotlog
-
-if [ $(($atleast)) -ge $(($numoffiles-1)) ]; then
-  echo $msgsuccess
-else
-  echo $msgfail
-  exit -1
-fi