--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.runtime.test/src/com/oracle/jvmci/runtime/test/TypeUniverse.java	Tue Jun 02 15:15:58 2015 +0200
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 2013, 2014, 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.jvmci.runtime.test;
+
+import static java.lang.reflect.Modifier.*;
+
+import java.io.*;
+import java.lang.reflect.*;
+import java.util.*;
+import java.util.Queue;
+import java.util.stream.*;
+
+import org.junit.*;
+
+import sun.misc.*;
+
+import com.oracle.jvmci.meta.*;
+import com.oracle.jvmci.runtime.*;
+
+/**
+ * Context for type related tests.
+ */
+public class TypeUniverse {
+
+    public static final Unsafe unsafe;
+    public static final double JAVA_VERSION = Double.valueOf(System.getProperty("java.specification.version"));
+
+    public static final MetaAccessProvider metaAccess = JVMCI.getRuntime().getHostJVMCIBackend().getMetaAccess();
+    public static final ConstantReflectionProvider constantReflection = JVMCI.getRuntime().getHostJVMCIBackend().getConstantReflection();
+    public static final Collection<Class<?>> classes = new HashSet<>();
+    public static final Set<ResolvedJavaType> javaTypes;
+    public static final Map<Class<?>, Class<?>> arrayClasses = new HashMap<>();
+
+    private static List<ConstantValue> constants;
+
+    static {
+        Unsafe theUnsafe = null;
+        try {
+            theUnsafe = Unsafe.getUnsafe();
+        } catch (Exception e) {
+            try {
+                Field theUnsafeField = Unsafe.class.getDeclaredField("theUnsafe");
+                theUnsafeField.setAccessible(true);
+                theUnsafe = (Unsafe) theUnsafeField.get(null);
+            } catch (Exception e1) {
+                throw (InternalError) new InternalError("unable to initialize unsafe").initCause(e1);
+            }
+        }
+        unsafe = theUnsafe;
+
+        Class<?>[] initialClasses = {void.class, boolean.class, byte.class, short.class, char.class, int.class, float.class, long.class, double.class, Object.class, Class.class, ClassLoader.class,
+                        String.class, Serializable.class, Cloneable.class, Test.class, TestMetaAccessProvider.class, List.class, Collection.class, Map.class, Queue.class, HashMap.class,
+                        LinkedHashMap.class, IdentityHashMap.class, AbstractCollection.class, AbstractList.class, ArrayList.class, TrustedInterface.class};
+        for (Class<?> c : initialClasses) {
+            addClass(c);
+        }
+
+        javaTypes = Collections.unmodifiableSet(classes.stream().map(c -> metaAccess.lookupJavaType(c)).collect(Collectors.toSet()));
+    }
+
+    static class ConstantsUniverse {
+        static final Object[] ARRAYS = classes.stream().map(c -> c != void.class && !c.isArray() ? Array.newInstance(c, 42) : null).filter(o -> o != null).collect(Collectors.toList()).toArray();
+        static final Object CONST1 = new ArrayList<>();
+        static final Object CONST2 = new ArrayList<>();
+        static final Object CONST3 = new IdentityHashMap<>();
+        static final Object CONST4 = new LinkedHashMap<>();
+        static final Object CONST5 = new TreeMap<>();
+        static final Object CONST6 = new ArrayDeque<>();
+        static final Object CONST7 = new LinkedList<>();
+        static final Object CONST8 = "a string";
+        static final Object CONST9 = 42;
+        static final Object CONST10 = String.class;
+        static final Object CONST11 = String[].class;
+    }
+
+    public static List<ConstantValue> constants() {
+        if (constants == null) {
+            List<ConstantValue> res = readConstants(JavaConstant.class);
+            res.addAll(readConstants(ConstantsUniverse.class));
+            constants = res;
+        }
+        return constants;
+    }
+
+    public static class ConstantValue {
+        public final String name;
+        public final JavaConstant value;
+        public final Object boxed;
+
+        public ConstantValue(String name, JavaConstant value, Object boxed) {
+            this.name = name;
+            this.value = value;
+            this.boxed = boxed;
+        }
+
+        @Override
+        public String toString() {
+            return name + "=" + value;
+        }
+
+        public String getSimpleName() {
+            return name.substring(name.lastIndexOf('.') + 1);
+        }
+    }
+
+    /**
+     * Reads the value of all {@code static final} fields from a given class into an array of
+     * {@link ConstantValue}s.
+     */
+    public static List<ConstantValue> readConstants(Class<?> fromClass) {
+        try {
+            List<ConstantValue> res = new ArrayList<>();
+            for (Field field : fromClass.getDeclaredFields()) {
+                if (isStatic(field.getModifiers()) && isFinal(field.getModifiers())) {
+                    JavaField javaField = metaAccess.lookupJavaField(field);
+                    Object boxed = field.get(null);
+                    if (boxed instanceof JavaConstant) {
+                        res.add(new ConstantValue(javaField.format("%H.%n"), (JavaConstant) boxed, boxed));
+                    } else {
+                        JavaConstant value = constantReflection.readConstantFieldValue(javaField, null);
+                        if (value != null) {
+                            res.add(new ConstantValue(javaField.format("%H.%n"), value, boxed));
+                            if (boxed instanceof Object[]) {
+                                Object[] arr = (Object[]) boxed;
+                                for (int i = 0; i < arr.length; i++) {
+                                    JavaConstant element = constantReflection.readArrayElement(value, i);
+                                    if (element != null) {
+                                        res.add(new ConstantValue(javaField.format("%H.%n[" + i + "]"), element, arr[i]));
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return res;
+        } catch (Exception e) {
+            throw new AssertionError(e);
+        }
+    }
+
+    public synchronized Class<?> getArrayClass(Class<?> componentType) {
+        Class<?> arrayClass = arrayClasses.get(componentType);
+        if (arrayClass == null) {
+            arrayClass = Array.newInstance(componentType, 0).getClass();
+            arrayClasses.put(componentType, arrayClass);
+        }
+        return arrayClass;
+    }
+
+    public static int dimensions(Class<?> c) {
+        if (c.getComponentType() != null) {
+            return 1 + dimensions(c.getComponentType());
+        }
+        return 0;
+    }
+
+    private static void addClass(Class<?> c) {
+        if (classes.add(c)) {
+            if (c.getSuperclass() != null) {
+                addClass(c.getSuperclass());
+            }
+            for (Class<?> sc : c.getInterfaces()) {
+                addClass(sc);
+            }
+            for (Class<?> dc : c.getDeclaredClasses()) {
+                addClass(dc);
+            }
+            for (Method m : c.getDeclaredMethods()) {
+                addClass(m.getReturnType());
+                for (Class<?> p : m.getParameterTypes()) {
+                    addClass(p);
+                }
+            }
+
+            if (c != void.class && dimensions(c) < 2) {
+                Class<?> arrayClass = Array.newInstance(c, 0).getClass();
+                arrayClasses.put(c, arrayClass);
+                addClass(arrayClass);
+            }
+        }
+    }
+}