diff -r 01f84e2c3fc0 -r c8683968c01b hotspot/test/gc/6941923/test6941923.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/6941923/test6941923.sh	Fri Jun 10 15:08:36 2011 -0700
@@ -0,0 +1,179 @@
+##
+## @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 "$OS" in
+  SunOS | Linux )
+    NULL=/dev/null
+    PS=":"
+    FS="/"
+    ;;
+  Windows_* )
+    echo "Test skipped for Windows"
+    exit 0 
+    ;;
+  * )
+    echo "Unrecognized system!"
+    exit 1;
+    ;;
+esac
+
+if [ "${JAVA_HOME}" = "" ]
+then
+  echo "JAVA_HOME not set"
+  exit 0
+fi
+
+$JAVA_HOME/bin/java -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 $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 $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