--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/charset/coders/BashCache.java	Wed Jan 27 19:39:55 2010 -0800
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @bug 4517279
+ * @summary Stochastic test of thread-local coder caches
+ */
+
+import java.nio.*;
+import java.nio.charset.*;
+import java.util.*;
+
+
+public class BashCache {
+
+    private static final int THREADS = 10;
+    private static final int TRIALS = 1000;
+
+    private static final Charset[] charsets
+        = new Charset[] {
+            Charset.forName("US-ASCII"),
+            Charset.forName("UTF-8"),
+            Charset.forName("CP1252"),
+            Charset.forName("UTF-16BE") };
+
+    private static volatile boolean failed = false;
+
+    private static class Basher extends Thread {
+
+        Random rnd = new Random(System.identityHashCode(this));
+
+        public void run() {
+            for (int i = 0; i < TRIALS; i++) {
+                Charset cs = charsets[rnd.nextInt(4)];
+                try {
+                    if (rnd.nextBoolean()) {
+                        cs.encode("hi mom");
+                    } else {
+                        cs.decode(ByteBuffer.wrap(new byte[] {
+                            (byte)'x', (byte)'y',
+                            (byte)'z', (byte)'z',
+                            (byte)'y' }));
+                    }
+                } catch (Exception x) {
+                    x.printStackTrace();
+                    failed = true;
+                    return;
+                }
+                if (rnd.nextBoolean())
+                    Thread.yield();
+            }
+        }
+
+    }
+
+    public static void main(String[] args) throws Exception {
+        Charset cs = Charset.forName("us-ascii");
+        Basher[] bashers = new Basher[THREADS];
+        for (int i = 0; i < THREADS; i++) {
+            bashers[i] = new Basher();
+            bashers[i].start();
+        }
+        for (int i = 0; i < THREADS; i++)
+            bashers[i].join();
+        if (failed)
+            throw new Exception("Test failed");
+    }
+
+}