--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.snippets.test/src/com/oracle/graal/snippets/MonitorTest.java	Thu Sep 13 00:25:58 2012 +0200
@@ -0,0 +1,209 @@
+/*
+ * 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.
+ */
+package com.oracle.graal.snippets;
+
+import org.junit.*;
+
+import com.oracle.graal.compiler.phases.*;
+import com.oracle.graal.compiler.test.*;
+
+public class MonitorTest extends GraalCompilerTest {
+
+    @Test
+    public void test0() {
+        test("lockObjectSimple", new Object(), "test1");
+    }
+
+    @Test
+    public void test0_1() {
+        test("lockThisSimple", "test1");
+    }
+
+    @Test
+    public void test0_2() {
+        test("lockObjectSimple", null, "test1");
+    }
+
+    @Test
+    public void test1_1() {
+        test("lockObject", new Object(), "test1", new String[1]);
+    }
+
+    @Test
+    public void test1_2() {
+        test("lockObject", null, "test1_1", new String[1]);
+    }
+
+    @Test
+    public void test2() {
+        test("lockThis", "test2", new String[1]);
+    }
+
+    /**
+     * Tests monitor operations on {@link EscapeAnalysisPhase virtual objects}.
+     */
+    @Test
+    public void test3() {
+        test("lockLocalObject", "test3", new String[1]);
+    }
+
+    /**
+     * Tests recursive locking of objects which should be biasable.
+     */
+    @Test
+    public void test4() {
+        Chars src = new Chars("1234567890".toCharArray());
+        Chars dst = new Chars(src.data.length);
+        test("copyObj", src, dst, 100);
+    }
+
+    /**
+     * Tests recursive locking of objects which do not appear to be biasable.
+     */
+    @Test
+    public void test5() {
+        char[] src = "1234567890".toCharArray();
+        char[] dst = new char[src.length];
+        test("copyArr", src, dst, 100);
+    }
+
+    /**
+     * Extends {@link #test4()} with contention.
+     */
+    @Test
+    public void test6() {
+        Chars src = new Chars("1234567890".toCharArray());
+        Chars dst = new Chars(src.data.length);
+        int n = Runtime.getRuntime().availableProcessors();
+        testN(n, "copyObj", src, dst, 100);
+    }
+
+    /**
+     * Extends {@link #test5()} with contention.
+     */
+    @Test
+    public void test7() {
+        char[] src = "1234567890".toCharArray();
+        char[] dst = new char[src.length];
+        int n = Runtime.getRuntime().availableProcessors();
+        testN(n, "copyArr", src, dst, 100);
+    }
+
+    private static String setAndGet(String[] box, String value) {
+        synchronized (box) {
+            box[0] = null;
+        }
+
+        // Do a GC while a object is locked (by the caller)
+        System.gc();
+
+        synchronized (box) {
+            box[0] = value;
+        }
+        return box[0];
+    }
+
+    public static String lockObjectSimple(Object o, String value) {
+        synchronized (o) {
+            return value;
+        }
+    }
+
+    public String lockThisSimple(String value) {
+        synchronized (this) {
+            return value;
+        }
+    }
+
+    public static String lockObject(Object o, String value, String[] box) {
+        synchronized (o) {
+            return setAndGet(box, value);
+        }
+    }
+
+    public String lockThis(String value, String[] box) {
+        synchronized (this) {
+            return setAndGet(box, value);
+        }
+    }
+
+    public static String lockLocalObject(String value, String[] box) {
+        Object o = new Object();
+        synchronized (o) {
+            return setAndGet(box, value);
+        }
+    }
+
+    static class Chars {
+        final char[] data;
+
+        public Chars(int size) {
+            this.data = new char[size];
+        }
+        public Chars(char[] data) {
+            this.data = data;
+        }
+    }
+
+    public static String copyObj(Chars src, Chars dst, int n) {
+        System.out.println(Thread.currentThread().getName() + " reps=" + n + ", src.length=" + src.data.length);
+        int total = 0;
+        for (int j = 0; j < n; j++) {
+            for (int i = 0; i < src.data.length; i++) {
+                synchronized (src) {
+                    synchronized (dst) {
+                        synchronized (src) {
+                            synchronized (dst) {
+                                dst.data[i] = src.data[i];
+                                total++;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        System.out.println(Thread.currentThread().getName() + " total " + total);
+        return new String(dst.data);
+    }
+
+    public static String copyArr(char[] src, char[] dst, int n) {
+        System.out.println(Thread.currentThread().getName() + " reps=" + n + ", src.length=" + src.length);
+        int total = 0;
+        for (int j = 0; j < n; j++) {
+            for (int i = 0; i < src.length; i++) {
+                synchronized (src) {
+                    synchronized (dst) {
+                        synchronized (src) {
+                            synchronized (dst) {
+                                dst[i] = src[i];
+                                total++;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        System.out.println(Thread.currentThread().getName() + " total " + total);
+        return new String(dst);
+    }
+}