--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/7194254/Test7194254.java	Mon Sep 17 07:36:31 2012 -0400
@@ -0,0 +1,119 @@
+/*
+ * 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
+ * @bug     7194254
+ * @summary Creates several threads with different java priorities and checks
+ *      whether jstack reports correct priorities for them.
+ *
+ * @run main T7194254
+ */
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.lang.management.ManagementFactory;
+import java.lang.management.RuntimeMXBean;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CyclicBarrier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Test7194254 {
+
+    public static void main(String[] args) throws Exception {
+        final int NUMBER_OF_JAVA_PRIORITIES =
+                Thread.MAX_PRIORITY - Thread.MIN_PRIORITY + 1;
+        final CyclicBarrier barrier =
+                new CyclicBarrier(NUMBER_OF_JAVA_PRIORITIES + 1);
+
+        for (int p = Thread.MIN_PRIORITY; p <= Thread.MAX_PRIORITY; ++p) {
+            final int priority = p;
+            new Thread("Priority=" + p) {
+                {
+                    setPriority(priority);
+                }
+                public void run() {
+                    try {
+                        barrier.await(); // 1st
+                        barrier.await(); // 2nd
+                    } catch (Exception exc) {
+                        // ignore
+                    }
+                }
+            }.start();
+        }
+        barrier.await(); // 1st
+
+        int matches = 0;
+        List<String> failed = new ArrayList<>();
+        try {
+            String pid = getPid();
+            String jstack = System.getProperty("java.home") + "/../bin/jstack";
+            Process process = new ProcessBuilder(jstack, pid)
+                    .redirectErrorStream(true).start();
+            Pattern pattern = Pattern.compile(
+                    "\\\"Priority=(\\d+)\\\".* prio=(\\d+).*");
+            try (BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream()))) {
+                String line;
+                while((line = reader.readLine()) != null) {
+                    Matcher matcher = pattern.matcher(line);
+                    if (matcher.matches()) {
+                        matches += 1;
+                        String expected = matcher.group(1);
+                        String actual = matcher.group(2);
+                        if (!expected.equals(actual)) {
+                            failed.add(line);
+                        }
+                    }
+                }
+            }
+            barrier.await(); // 2nd
+        } finally {
+            barrier.reset();
+        }
+
+        if (matches != NUMBER_OF_JAVA_PRIORITIES) {
+            throw new AssertionError("matches: expected " +
+                    NUMBER_OF_JAVA_PRIORITIES + ", but was " + matches);
+        }
+        if (!failed.isEmpty()) {
+            throw new AssertionError(failed.size() + ":" + failed);
+        }
+        System.out.println("Test passes.");
+    }
+
+    static String getPid() {
+        RuntimeMXBean runtimebean = ManagementFactory.getRuntimeMXBean();
+        String vmname = runtimebean.getName();
+        int i = vmname.indexOf('@');
+        if (i != -1) {
+            vmname = vmname.substring(0, i);
+        }
+        return vmname;
+    }
+
+}
+