changeset 22170:796f0fef110e

Renaming to PolyglotEngine
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Mon, 21 Sep 2015 10:34:30 +0200
parents 307a4ed5430e
children 41c5f430ce37
files truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/AccessorTest.java truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/ExceptionDuringParsingTest.java truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/GlobalSymbolTest.java truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/ImplicitExplicitExportTest.java truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/InitializationTest.java truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/TruffleVMSingleThreadedTest.java truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/LanguageCache.java truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/PolyglotEngine.java truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/Portaal.java truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/TruffleVM.java truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/SLTckTest.java truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/SLTestRunner.java truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/instrument/SLInstrumentTestRunner.java truffle/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLHandler.java truffle/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLServer.java truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLLanguage.java truffle/com.oracle.truffle.tck/src/com/oracle/truffle/tck/TruffleTCK.java truffle/com.oracle.truffle.tools.debug.shell/src/com/oracle/truffle/tools/debug/shell/server/REPLServerContext.java
diffstat 18 files changed, 952 insertions(+), 952 deletions(-) [+]
line wrap: on
line diff
--- a/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/AccessorTest.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/AccessorTest.java	Mon Sep 21 10:34:30 2015 +0200
@@ -27,7 +27,7 @@
 import com.oracle.truffle.api.source.Source;
 import com.oracle.truffle.api.test.vm.ImplicitExplicitExportTest.ExportImportLanguage1;
 import static com.oracle.truffle.api.test.vm.ImplicitExplicitExportTest.L1;
-import com.oracle.truffle.api.vm.Portaal;
+import com.oracle.truffle.api.vm.PolyglotEngine;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -48,8 +48,8 @@
 
     @Test
     public void canGetAccessToOwnLanguageInstance() throws Exception {
-        Portaal vm = Portaal.createNew().executor(Executors.newSingleThreadExecutor()).build();
-        Portaal.Language language = vm.getLanguages().get(L1);
+        PolyglotEngine vm = PolyglotEngine.createNew().executor(Executors.newSingleThreadExecutor()).build();
+        PolyglotEngine.Language language = vm.getLanguages().get(L1);
         assertNotNull("L1 language is defined", language);
 
         Source s = Source.fromText("return nothing", "nothing").withMimeType(L1);
@@ -61,7 +61,7 @@
         assertTrue("Right instance: " + afterInitialization, afterInitialization instanceof ExportImportLanguage1);
     }
 
-    Object findLanguageByClass(Portaal vm) throws IllegalAccessException, NoSuchMethodException, SecurityException, IllegalArgumentException, InvocationTargetException, NoSuchFieldException {
+    Object findLanguageByClass(PolyglotEngine vm) throws IllegalAccessException, NoSuchMethodException, SecurityException, IllegalArgumentException, InvocationTargetException, NoSuchFieldException {
         Method find = Accessor.class.getDeclaredMethod("findLanguage", Object.class, Class.class);
         find.setAccessible(true);
         TruffleLanguage.Env env = (TruffleLanguage.Env) find.invoke(API, vm, ExportImportLanguage1.class);
--- a/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/ExceptionDuringParsingTest.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/ExceptionDuringParsingTest.java	Mon Sep 21 10:34:30 2015 +0200
@@ -25,7 +25,7 @@
 import com.oracle.truffle.api.impl.Accessor;
 import com.oracle.truffle.api.source.Source;
 import static com.oracle.truffle.api.test.vm.ImplicitExplicitExportTest.L1;
-import com.oracle.truffle.api.vm.Portaal;
+import com.oracle.truffle.api.vm.PolyglotEngine;
 import java.io.IOException;
 import static org.junit.Assert.*;
 import org.junit.Test;
@@ -35,8 +35,8 @@
 
     @Test
     public void canGetAccessToOwnLanguageInstance() throws Exception {
-        Portaal vm = Portaal.createNew().build();
-        Portaal.Language language = vm.getLanguages().get(L1);
+        PolyglotEngine vm = PolyglotEngine.createNew().build();
+        PolyglotEngine.Language language = vm.getLanguages().get(L1);
         assertNotNull("L1 language is defined", language);
 
         try {
--- a/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/GlobalSymbolTest.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/GlobalSymbolTest.java	Mon Sep 21 10:34:30 2015 +0200
@@ -33,7 +33,7 @@
 public class GlobalSymbolTest {
     @Test
     public void globalSymbolFoundByLanguage() throws IOException {
-        Portaal vm = Portaal.createNew().globalSymbol("ahoj", "42").executor(Executors.newSingleThreadExecutor()).build();
+        PolyglotEngine vm = PolyglotEngine.createNew().globalSymbol("ahoj", "42").executor(Executors.newSingleThreadExecutor()).build();
         // @formatter:off
         Object ret = vm.eval(
             Source.fromText("return=ahoj", "Return").withMimeType(L3)
@@ -44,8 +44,8 @@
 
     @Test
     public void globalSymbolFoundByVMUser() throws IOException {
-        Portaal vm = Portaal.createNew().globalSymbol("ahoj", "42").build();
-        Portaal.Value ret = vm.findGlobalSymbol("ahoj");
+        PolyglotEngine vm = PolyglotEngine.createNew().globalSymbol("ahoj", "42").build();
+        PolyglotEngine.Value ret = vm.findGlobalSymbol("ahoj");
         assertNotNull("Symbol found", ret);
         assertEquals("42", ret.get());
     }
--- a/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/ImplicitExplicitExportTest.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/ImplicitExplicitExportTest.java	Mon Sep 21 10:34:30 2015 +0200
@@ -38,12 +38,12 @@
 
 public class ImplicitExplicitExportTest {
     private static Thread mainThread;
-    private Portaal vm;
+    private PolyglotEngine vm;
 
     @Before
     public void initializeVM() {
         mainThread = Thread.currentThread();
-        vm = Portaal.createNew().executor(Executors.newSingleThreadExecutor()).build();
+        vm = PolyglotEngine.createNew().executor(Executors.newSingleThreadExecutor()).build();
         assertTrue("Found " + L1 + " language", vm.getLanguages().containsKey(L1));
         assertTrue("Found " + L2 + " language", vm.getLanguages().containsKey(L2));
         assertTrue("Found " + L3 + " language", vm.getLanguages().containsKey(L3));
--- a/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/InitializationTest.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/InitializationTest.java	Mon Sep 21 10:34:30 2015 +0200
@@ -39,7 +39,7 @@
 import com.oracle.truffle.api.source.Source;
 import com.oracle.truffle.api.source.SourceSection;
 import com.oracle.truffle.api.vm.EventConsumer;
-import com.oracle.truffle.api.vm.Portaal;
+import com.oracle.truffle.api.vm.PolyglotEngine;
 import java.io.IOException;
 
 /**
@@ -56,7 +56,7 @@
     @Test
     public void accessProbeForAbstractLanguage() throws IOException {
         final Debugger[] arr = {null};
-        Portaal vm = Portaal.createNew().onEvent(new EventConsumer<ExecutionEvent>(ExecutionEvent.class) {
+        PolyglotEngine vm = PolyglotEngine.createNew().onEvent(new EventConsumer<ExecutionEvent>(ExecutionEvent.class) {
             @Override
             protected void on(ExecutionEvent event) {
                 arr[0] = event.getDebugger();
--- a/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/TruffleVMSingleThreadedTest.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/vm/TruffleVMSingleThreadedTest.java	Mon Sep 21 10:34:30 2015 +0200
@@ -31,11 +31,11 @@
 import com.oracle.truffle.api.vm.*;
 
 public class TruffleVMSingleThreadedTest {
-    Portaal tvm;
+    PolyglotEngine tvm;
 
     @Before
     public void initInDifferentThread() throws InterruptedException {
-        final Portaal.Builder b = Portaal.createNew();
+        final PolyglotEngine.Builder b = PolyglotEngine.createNew();
         Thread t = new Thread("Initializer") {
             @Override
             public void run() {
--- a/truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/LanguageCache.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/LanguageCache.java	Mon Sep 21 10:34:30 2015 +0200
@@ -25,7 +25,7 @@
 package com.oracle.truffle.api.vm;
 
 import com.oracle.truffle.api.TruffleLanguage;
-import static com.oracle.truffle.api.vm.Portaal.LOG;
+import static com.oracle.truffle.api.vm.PolyglotEngine.LOG;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
@@ -80,7 +80,7 @@
     }
 
     private static ClassLoader loader() {
-        ClassLoader l = Portaal.class.getClassLoader();
+        ClassLoader l = PolyglotEngine.class.getClassLoader();
         if (l == null) {
             l = ClassLoader.getSystemClassLoader();
         }
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/PolyglotEngine.java	Mon Sep 21 10:34:30 2015 +0200
@@ -0,0 +1,872 @@
+/*
+ * Copyright (c) 2014, 2015, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.truffle.api.vm;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.TruffleLanguage.Env;
+import com.oracle.truffle.api.TruffleLanguage.Registration;
+import com.oracle.truffle.api.debug.*;
+import com.oracle.truffle.api.impl.*;
+import com.oracle.truffle.api.instrument.*;
+import com.oracle.truffle.api.interop.TruffleObject;
+import com.oracle.truffle.api.interop.java.JavaInterop;
+import com.oracle.truffle.api.source.*;
+import java.io.*;
+import java.net.*;
+import java.nio.file.*;
+import java.util.*;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+import java.util.logging.*;
+
+/**
+ * Gate way into the world of {@link TruffleLanguage Truffle languages}. {@link #createNew()
+ * Instantiate} your own portal into the isolated, multi language system with all the registered
+ * languages ready for your use. A {@link PolyglotEngine} runs inside of a <em>JVM</em>, there can however
+ * be multiple instances (some would say tenants) of {@link PolyglotEngine} running next to each other in a
+ * single <em>JVM</em> with a complete mutual isolation. There is 1:N mapping between <em>JVM</em>
+ * and {@link PolyglotEngine}.
+ * <p>
+ * It would not be correct to think of a {@link PolyglotEngine} as a runtime for a single
+ * {@link TruffleLanguage Truffle language} (Ruby, Python, R, C, JavaScript, etc.) either.
+ * {@link PolyglotEngine} can host as many of Truffle languages as {@link Registration registered on a
+ * class path} of your <em>JVM</em> application. {@link PolyglotEngine} orchestrates these languages,
+ * manages exchange of objects and calls among them. While it may happen that there is just one
+ * activated language inside of a {@link PolyglotEngine}, the greatest strength of {@link PolyglotEngine} is in
+ * inter-operability between all Truffle languages. There is 1:N mapping between {@link PolyglotEngine} and
+ * {@link TruffleLanguage Truffle language implementations}.
+ * <p>
+ * Use {@link #createNew()} to create new isolated portal ready for execution of various languages.
+ * All the languages in a single portal see each other exported global symbols and can cooperate.
+ * Use {@link #createNew()} multiple times to create different, isolated portal environment
+ * completely separated from each other.
+ * <p>
+ * Once instantiated use {@link #eval(java.net.URI)} with a reference to a file or URL or directly
+ * pass code snippet into the virtual machine via {@link #eval(java.lang.String, java.lang.String)}.
+ * Support for individual languages is initialized on demand - e.g. once a file of certain MIME type
+ * is about to be processed, its appropriate engine (if found), is initialized. Once an engine gets
+ * initialized, it remains so, until the virtual machine isn't garbage collected.
+ * <p>
+ * The <code>TruffleVM</code> is single-threaded and tries to enforce that. It records the thread it
+ * has been {@link Builder#build() created} by and checks that all subsequent calls are coming from
+ * the same thread. There is 1:1 mapping between {@link PolyglotEngine} and a thread that can tell it what
+ * to do.
+ */
+@SuppressWarnings("rawtypes")
+public class PolyglotEngine {
+    static final Logger LOG = Logger.getLogger(PolyglotEngine.class.getName());
+    private static final SPIAccessor SPI = new SPIAccessor();
+    private final Thread initThread;
+    private final Executor executor;
+    private final Map<String, Language> langs;
+    private final Reader in;
+    private final Writer err;
+    private final Writer out;
+    private final EventConsumer<?>[] handlers;
+    private final Map<String, Object> globals;
+    private Debugger debugger;
+
+    /**
+     * Private & temporary only constructor.
+     */
+    PolyglotEngine() {
+        this.initThread = null;
+        this.in = null;
+        this.err = null;
+        this.out = null;
+        this.langs = null;
+        this.handlers = null;
+        this.globals = null;
+        this.executor = null;
+    }
+
+    /**
+     * Real constructor used from the builder.
+     */
+    PolyglotEngine(Executor executor, Map<String, Object> globals, Writer out, Writer err, Reader in, EventConsumer<?>[] handlers) {
+        this.executor = executor;
+        this.out = out;
+        this.err = err;
+        this.in = in;
+        this.handlers = handlers;
+        this.initThread = Thread.currentThread();
+        this.globals = new HashMap<>(globals);
+        Map<String, Language> map = new HashMap<>();
+        for (Map.Entry<String, LanguageCache> en : LanguageCache.languages().entrySet()) {
+            map.put(en.getKey(), createLanguage(en));
+        }
+        this.langs = map;
+    }
+
+    /**
+     * Creation of new Truffle virtual machine. Use the {@link Builder} methods to configure your
+     * virtual machine and then create one using {@link Builder#build()}:
+     *
+     * <pre>
+     * {@link PolyglotEngine} vm = {@link PolyglotEngine}.{@link PolyglotEngine#createNew() createNew()}
+     *     .{@link Builder#stdOut(java.io.Writer) stdOut}({@link Writer yourWriter})
+     *     .{@link Builder#stdErr(java.io.Writer) stdErr}({@link Writer yourWriter})
+     *     .{@link Builder#stdIn(java.io.Reader) stdIn}({@link Reader yourReader})
+     *     .{@link Builder#build() build()};
+     * </pre>
+     *
+     * It searches for {@link Registration languages registered} in the system class loader and
+     * makes them available for later evaluation via
+     * {@link #eval(java.lang.String, java.lang.String)} methods.
+     *
+     * @return new, isolated virtual machine with pre-registered languages
+     */
+    public static PolyglotEngine.Builder createNew() {
+        // making Builder non-static inner class is a
+        // nasty trick to avoid the Builder class to appear
+        // in Javadoc next to TruffleVM class
+        PolyglotEngine vm = new PolyglotEngine();
+        return vm.new Builder();
+    }
+
+    /**
+     * Builder for a new {@link PolyglotEngine}. Call various configuration methods in a chain and at the
+     * end create new {@link PolyglotEngine virtual machine}:
+     *
+     * <pre>
+     * {@link PolyglotEngine} vm = {@link PolyglotEngine}.{@link PolyglotEngine#createNew() createNew()}
+     *     .{@link Builder#stdOut(java.io.Writer) stdOut}({@link Writer yourWriter})
+     *     .{@link Builder#stdErr(java.io.Writer) stdErr}({@link Writer yourWriter})
+     *     .{@link Builder#stdIn(java.io.Reader) stdIn}({@link Reader yourReader})
+     *     .{@link Builder#build() build()};
+     * </pre>
+     */
+    public class Builder {
+        private Writer out;
+        private Writer err;
+        private Reader in;
+        private final List<EventConsumer<?>> handlers = new ArrayList<>();
+        private final Map<String, Object> globals = new HashMap<>();
+        private Executor executor;
+
+        Builder() {
+        }
+
+        /**
+         * Changes the default output for languages running in <em>to be created</em>
+         * {@link PolyglotEngine virtual machine}. The default is to use {@link System#out}.
+         *
+         * @param w the writer to use as output
+         * @return instance of this builder
+         */
+        public Builder stdOut(Writer w) {
+            out = w;
+            return this;
+        }
+
+        /**
+         * Changes the error output for languages running in <em>to be created</em> {@link PolyglotEngine
+         * virtual machine}. The default is to use {@link System#err}.
+         *
+         * @param w the writer to use as output
+         * @return instance of this builder
+         */
+        public Builder stdErr(Writer w) {
+            err = w;
+            return this;
+        }
+
+        /**
+         * Changes the default input for languages running in <em>to be created</em> {@link PolyglotEngine
+         * virtual machine}. The default is to use {@link System#out}.
+         *
+         * @param r the reader to use as input
+         * @return instance of this builder
+         */
+        public Builder stdIn(Reader r) {
+            in = r;
+            return this;
+        }
+
+        /**
+         * Registers another instance of {@link EventConsumer} into the to be created
+         * {@link PolyglotEngine}.
+         *
+         * @param handler the handler to register
+         * @return instance of this builder
+         */
+        public Builder onEvent(EventConsumer<?> handler) {
+            handler.getClass();
+            handlers.add(handler);
+            return this;
+        }
+
+        /**
+         * Adds global named symbol into the configuration of to-be-built {@link PolyglotEngine}. This
+         * symbol will be accessible to all languages via {@link Env#importSymbol(java.lang.String)}
+         * and will take precedence over {@link TruffleLanguage#findExportedSymbol symbols exported
+         * by languages itself}. Repeated use of <code>globalSymbol</code> is possible; later
+         * definition of the same name overrides the previous one.
+         *
+         * @param name name of the symbol to register
+         * @param obj value of the object - expected to be primitive wrapper, {@link String} or
+         *            <code>TruffleObject</code> for mutual inter-operability
+         * @return instance of this builder
+         * @see PolyglotEngine#findGlobalSymbol(java.lang.String)
+         */
+        public Builder globalSymbol(String name, Object obj) {
+            globals.put(name, obj);
+            return this;
+        }
+
+        /**
+         * Provides own executor for running {@link PolyglotEngine} scripts. By default
+         * {@link PolyglotEngine#eval(com.oracle.truffle.api.source.Source)} and
+         * {@link Value#invoke(java.lang.Object, java.lang.Object[])} are executed synchronously in
+         * the calling thread. Sometimes, however it is more beneficial to run them asynchronously -
+         * the easiest way to do so is to provide own executor when configuring the {
+         * {@link #executor(java.util.concurrent.Executor) the builder}. The executor is expected to
+         * execute all {@link Runnable runnables} passed into its
+         * {@link Executor#execute(java.lang.Runnable)} method in the order they arrive and in a
+         * single (yet arbitrary) thread.
+         *
+         * @param executor the executor to use for internal execution inside the {@link #build() to
+         *            be created} {@link PolyglotEngine}
+         * @return instance of this builder
+         */
+        @SuppressWarnings("hiding")
+        public Builder executor(Executor executor) {
+            this.executor = executor;
+            return this;
+        }
+
+        /**
+         * Creates the {@link PolyglotEngine Truffle virtual machine}. The configuration is taken from
+         * values passed into configuration methods in this class.
+         *
+         * @return new, isolated virtual machine with pre-registered languages
+         */
+        @SuppressWarnings("deprecation")
+        public PolyglotEngine build() {
+            if (out == null) {
+                out = new OutputStreamWriter(System.out);
+            }
+            if (err == null) {
+                err = new OutputStreamWriter(System.err);
+            }
+            if (in == null) {
+                in = new InputStreamReader(System.in);
+            }
+            Executor nonNullExecutor = executor != null ? executor : new Executor() {
+                @Override
+                public void execute(Runnable command) {
+                    command.run();
+                }
+            };
+            return new TruffleVM(nonNullExecutor, globals, out, err, in, handlers.toArray(new EventConsumer[0]));
+        }
+    }
+
+    /**
+     * Descriptions of languages supported in this Truffle virtual machine.
+     *
+     * @return an immutable map with keys being MIME types and values the {@link Language
+     *         descriptions} of associated languages
+     */
+    public Map<String, ? extends Language> getLanguages() {
+        return Collections.unmodifiableMap(langs);
+    }
+
+    /**
+     * Evaluates file located on a given URL. Is equivalent to loading the content of a file and
+     * executing it via {@link #eval(java.lang.String, java.lang.String)} with a MIME type guess
+     * based on the file's extension and/or content.
+     *
+     * @param location the location of a file to execute
+     * @return result of a processing the file, possibly <code>null</code>
+     * @throws IOException exception to signal I/O problems or problems with processing the file's
+     *             content
+     * @deprecated use {@link #eval(com.oracle.truffle.api.source.Source)}
+     */
+    @Deprecated
+    public Object eval(URI location) throws IOException {
+        checkThread();
+        Source s;
+        String mimeType;
+        if (location.getScheme().equals("file")) {
+            File file = new File(location);
+            s = Source.fromFileName(file.getPath(), true);
+            if (file.getName().endsWith(".c")) {
+                mimeType = "text/x-c";
+            } else if (file.getName().endsWith(".sl")) {
+                mimeType = "application/x-sl";
+            } else if (file.getName().endsWith(".R") || file.getName().endsWith(".r")) {
+                mimeType = "application/x-r";
+            } else {
+                mimeType = Files.probeContentType(file.toPath());
+            }
+        } else {
+            URL url = location.toURL();
+            s = Source.fromURL(url, location.toString());
+            URLConnection conn = url.openConnection();
+            mimeType = conn.getContentType();
+        }
+        Language l = langs.get(mimeType);
+        if (l == null) {
+            throw new IOException("No language for " + location + " with MIME type " + mimeType + " found. Supported types: " + langs.keySet());
+        }
+        return eval(l, s).get();
+    }
+
+    /**
+     * Evaluates code snippet. Chooses a language registered for a given MIME type (throws
+     * {@link IOException} if there is none). And passes the specified code to it for execution.
+     *
+     * @param mimeType MIME type of the code snippet - chooses the right language
+     * @param reader the source of code snippet to execute
+     * @return result of an execution, possibly <code>null</code>
+     * @throws IOException thrown to signal errors while processing the code
+     * @deprecated use {@link #eval(com.oracle.truffle.api.source.Source)}
+     */
+    @Deprecated
+    public Object eval(String mimeType, Reader reader) throws IOException {
+        checkThread();
+        Language l = langs.get(mimeType);
+        if (l == null) {
+            throw new IOException("No language for MIME type " + mimeType + " found. Supported types: " + langs.keySet());
+        }
+        return eval(l, Source.fromReader(reader, mimeType)).get();
+    }
+
+    /**
+     * Evaluates code snippet. Chooses a language registered for a given MIME type (throws
+     * {@link IOException} if there is none). And passes the specified code to it for execution.
+     *
+     * @param mimeType MIME type of the code snippet - chooses the right language
+     * @param code the code snippet to execute
+     * @return result of an execution, possibly <code>null</code>
+     * @throws IOException thrown to signal errors while processing the code
+     * @deprecated use {@link #eval(com.oracle.truffle.api.source.Source)}
+     */
+    @Deprecated
+    public Object eval(String mimeType, String code) throws IOException {
+        checkThread();
+        Language l = langs.get(mimeType);
+        if (l == null) {
+            throw new IOException("No language for MIME type " + mimeType + " found. Supported types: " + langs.keySet());
+        }
+        return eval(l, Source.fromText(code, mimeType)).get();
+    }
+
+    /**
+     * Evaluates provided source. Chooses language registered for a particular
+     * {@link Source#getMimeType() MIME type} (throws {@link IOException} if there is none). The
+     * language is then allowed to parse and execute the source.
+     *
+     * @param source code snippet to execute
+     * @return a {@link Value} object that holds result of an execution, never <code>null</code>
+     * @throws IOException thrown to signal errors while processing the code
+     */
+    public Value eval(Source source) throws IOException {
+        String mimeType = source.getMimeType();
+        checkThread();
+        Language l = langs.get(mimeType);
+        if (l == null) {
+            throw new IOException("No language for MIME type " + mimeType + " found. Supported types: " + langs.keySet());
+        }
+        return eval(l, source);
+    }
+
+    private Value eval(final Language l, final Source s) throws IOException {
+        final Debugger[] fillIn = {debugger};
+        final Object[] result = {null, null};
+        final CountDownLatch ready = new CountDownLatch(1);
+        final TruffleLanguage[] lang = {null};
+        executor.execute(new Runnable() {
+            @Override
+            public void run() {
+                evalImpl(fillIn, lang, s, result, l, ready);
+            }
+        });
+        exceptionCheck(result);
+        return createValue(lang[0], result, ready);
+    }
+
+    Value createValue(TruffleLanguage lang, Object[] result, CountDownLatch ready) {
+        return new Value(lang, result, ready);
+    }
+    Language createLanguage(Map.Entry<String, LanguageCache> en) {
+        return new Language(en.getValue());
+    }
+
+
+    @SuppressWarnings("try")
+    private void evalImpl(Debugger[] fillIn, TruffleLanguage<?>[] fillLang, Source s, Object[] result, Language l, CountDownLatch ready) {
+        try (Closeable d = SPI.executionStart(this, fillIn, s)) {
+            TruffleLanguage<?> langImpl = l.getImpl(true);
+            fillLang[0] = langImpl;
+            PolyglotEngine.findDebuggerSupport(langImpl);
+            if (debugger == null) {
+                debugger = fillIn[0];
+            }
+            result[0] = SPI.eval(langImpl, s);
+        } catch (IOException ex) {
+            result[1] = ex;
+        } finally {
+            ready.countDown();
+        }
+    }
+
+    /**
+     * Looks global symbol provided by one of initialized languages up. First of all execute your
+     * program via one of your {@link #eval(java.lang.String, java.lang.String)} and then look
+     * expected symbol up using this method.
+     * <p>
+     * The names of the symbols are language dependent, but for example the Java language bindings
+     * follow the specification for method references:
+     * <ul>
+     * <li>"java.lang.Exception::new" is a reference to constructor of {@link Exception}
+     * <li>"java.lang.Integer::valueOf" is a reference to static method in {@link Integer} class
+     * </ul>
+     * Once an symbol is obtained, it remembers values for fast access and is ready for being
+     * invoked.
+     *
+     * @param globalName the name of the symbol to find
+     * @return found symbol or <code>null</code> if it has not been found
+     */
+    public Value findGlobalSymbol(final String globalName) {
+        checkThread();
+        final TruffleLanguage<?>[] lang = {null};
+        final Object[] obj = {globals.get(globalName), null};
+        final CountDownLatch ready = new CountDownLatch(1);
+        if (obj[0] == null) {
+            executor.execute(new Runnable() {
+                @Override
+                public void run() {
+                    findGlobalSymbolImpl(obj, globalName, lang, ready);
+                }
+            });
+            try {
+                ready.await();
+            } catch (InterruptedException ex) {
+                LOG.log(Level.SEVERE, null, ex);
+            }
+        } else {
+            ready.countDown();
+        }
+        return obj[0] == null ? null : createValue(lang[0], obj, ready);
+    }
+
+    private void findGlobalSymbolImpl(Object[] obj, String globalName, TruffleLanguage<?>[] lang, CountDownLatch ready) {
+        if (obj[0] == null) {
+            for (Language dl : langs.values()) {
+                TruffleLanguage.Env env = dl.getEnv(false);
+                if (env == null) {
+                    continue;
+                }
+                obj[0] = SPI.findExportedSymbol(env, globalName, true);
+                if (obj[0] != null) {
+                    lang[0] = dl.getImpl(true);
+                    break;
+                }
+            }
+        }
+        if (obj[0] == null) {
+            for (Language dl : langs.values()) {
+                TruffleLanguage.Env env = dl.getEnv(false);
+                if (env == null) {
+                    continue;
+                }
+                obj[0] = SPI.findExportedSymbol(env, globalName, true);
+                if (obj[0] != null) {
+                    lang[0] = dl.getImpl(true);
+                    break;
+                }
+            }
+        }
+        ready.countDown();
+    }
+
+    private void checkThread() {
+        if (initThread != Thread.currentThread()) {
+            throw new IllegalStateException("TruffleVM created on " + initThread.getName() + " but used on " + Thread.currentThread().getName());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    void dispatch(Object ev) {
+        Class type = ev.getClass();
+        if (type == SuspendedEvent.class) {
+            dispatchSuspendedEvent((SuspendedEvent) ev);
+        }
+        if (type == ExecutionEvent.class) {
+            dispatchExecutionEvent((ExecutionEvent) ev);
+        }
+        dispatch(type, ev);
+    }
+
+    @SuppressWarnings("unused")
+    void dispatchSuspendedEvent(SuspendedEvent event) {
+    }
+
+    @SuppressWarnings("unused")
+    void dispatchExecutionEvent(ExecutionEvent event) {
+    }
+
+    @SuppressWarnings("unchecked")
+    <Event> void dispatch(Class<Event> type, Event event) {
+        for (EventConsumer handler : handlers) {
+            if (handler.type == type) {
+                handler.on(event);
+            }
+        }
+    }
+
+    static void exceptionCheck(Object[] result) throws RuntimeException, IOException {
+        if (result[1] instanceof IOException) {
+            throw (IOException) result[1];
+        }
+        if (result[1] instanceof RuntimeException) {
+            throw (RuntimeException) result[1];
+        }
+    }
+
+    /**
+     * A future value wrapper. A user level wrapper around values returned by evaluation of various
+     * {@link PolyglotEngine} functions like {@link PolyglotEngine#findGlobalSymbol(java.lang.String)} and
+     * {@link PolyglotEngine#eval(com.oracle.truffle.api.source.Source)} or value returned by
+     * {@link #invoke(java.lang.Object, java.lang.Object...) sbbsequent of execution}. In case the
+     * {@link PolyglotEngine} has been initialized for
+     * {@link Builder#executor(java.util.concurrent.Executor) asynchronous excution}, the
+     * {@link Value} represents a future - e.g. it is returned immediately, leaving the execution
+     * running on behind.
+     */
+    public class Value {
+        private final TruffleLanguage<?> language;
+        private final Object[] result;
+        private final CountDownLatch ready;
+        private CallTarget target;
+
+        Value(TruffleLanguage<?> language, Object[] result, CountDownLatch ready) {
+            this.language = language;
+            this.result = result;
+            this.ready = ready;
+        }
+
+        /**
+         * Obtains the object represented by this symbol. The <em>raw</em> object can either be a
+         * wrapper about primitive type (e.g. {@link Number}, {@link String}, {@link Character},
+         * {@link Boolean}) or a <em>TruffleObject</em> representing more complex object from a
+         * language. The method can return <code>null</code>.
+         *
+         * @return the object or <code>null</code>
+         * @throws IOException in case it is not possible to obtain the value of the object
+         */
+        public Object get() throws IOException {
+            waitForSymbol();
+            exceptionCheck(result);
+            return result[0];
+        }
+
+        /**
+         * Obtains Java view of the object represented by this symbol. The method basically
+         * delegates to
+         * {@link JavaInterop#asJavaObject(java.lang.Class, com.oracle.truffle.api.interop.TruffleObject)}
+         * just handles primitive types as well.
+         * 
+         * @param <T> the type of the view one wants to obtain
+         * @param representation the class of the view interface (it has to be an interface)
+         * @return instance of the view wrapping the object of this symbol
+         * @throws IOException in case it is not possible to obtain the value of the object
+         * @throws ClassCastException if the value cannot be converted to desired view
+         */
+        public <T> T as(Class<T> representation) throws IOException {
+            Object obj = get();
+            if (representation.isInstance(obj)) {
+                return representation.cast(obj);
+            }
+            return JavaInterop.asJavaObject(representation, (TruffleObject) obj);
+        }
+
+        /**
+         * Invokes the symbol. If the symbol represents a function, then it should be invoked with
+         * provided arguments. If the symbol represents a field, then first argument (if provided)
+         * should set the value to the field; the return value should be the actual value of the
+         * field when the <code>invoke</code> method returns.
+         *
+         * @param thiz this/self in language that support such concept; use <code>null</code> to let
+         *            the language use default this/self or ignore the value
+         * @param args arguments to pass when invoking the symbol
+         * @return symbol wrapper around the value returned by invoking the symbol, never
+         *         <code>null</code>
+         * @throws IOException signals problem during execution
+         */
+        public Value invoke(final Object thiz, final Object... args) throws IOException {
+            get();
+            final Debugger[] fillIn = {debugger};
+            final CountDownLatch done = new CountDownLatch(1);
+            final Object[] res = {null, null};
+            executor.execute(new Runnable() {
+                @Override
+                public void run() {
+                    invokeImpl(fillIn, thiz, args, res, done);
+                }
+            });
+            exceptionCheck(res);
+            return createValue(language, res, done);
+        }
+
+        @SuppressWarnings("try")
+        private void invokeImpl(Debugger[] fillIn, Object thiz, Object[] args, Object[] res, CountDownLatch done) {
+            try (final Closeable c = SPI.executionStart(PolyglotEngine.this, fillIn, null)) {
+                if (debugger == null) {
+                    debugger = fillIn[0];
+                }
+                List<Object> arr = new ArrayList<>();
+                if (thiz == null && language != null) {
+                    Object global = SPI.languageGlobal(SPI.findLanguage(PolyglotEngine.this, language.getClass()));
+                    if (global != null) {
+                        arr.add(global);
+                    }
+                } else {
+                    arr.add(thiz);
+                }
+                arr.addAll(Arrays.asList(args));
+                for (;;) {
+                    try {
+                        if (target == null) {
+                            target = SymbolInvokerImpl.createCallTarget(language, result[0], arr.toArray());
+                        }
+                        res[0] = target.call(arr.toArray());
+                        break;
+                    } catch (ArgumentsMishmashException ex) {
+                        target = null;
+                    }
+                }
+            } catch (IOException ex) {
+                res[1] = ex;
+            } catch (RuntimeException ex) {
+                res[1] = ex;
+            } finally {
+                done.countDown();
+            }
+        }
+
+        private void waitForSymbol() throws InterruptedIOException {
+            checkThread();
+            try {
+                ready.await();
+            } catch (InterruptedException ex) {
+                throw (InterruptedIOException) new InterruptedIOException(ex.getMessage()).initCause(ex);
+            }
+        }
+    }
+
+    /**
+     * Description of a language registered in {@link PolyglotEngine Truffle virtual machine}. Languages
+     * are registered by {@link Registration} annotation which stores necessary information into a
+     * descriptor inside of the language's JAR file. When a new {@link PolyglotEngine} is created, it reads
+     * all available descriptors and creates {@link Language} objects to represent them. One can
+     * obtain a {@link #getName() name} or list of supported {@link #getMimeTypes() MIME types} for
+     * each language. The actual language implementation is not initialized until
+     * {@link PolyglotEngine#eval(java.lang.String, java.lang.String) a code is evaluated} in it.
+     */
+    public class Language {
+        private final LanguageCache info;
+        private TruffleLanguage.Env env;
+
+        Language(LanguageCache info) {
+            this.info = info;
+        }
+
+        /**
+         * MIME types recognized by the language.
+         *
+         * @return returns immutable set of recognized MIME types
+         */
+        public Set<String> getMimeTypes() {
+            return info.getMimeTypes();
+        }
+
+        /**
+         * Human readable name of the language. Think of C, Ruby, JS, etc.
+         *
+         * @return string giving the language a name
+         */
+        public String getName() {
+            return info.getName();
+        }
+
+        /**
+         * Name of the language version.
+         *
+         * @return string specifying the language version
+         */
+        public String getVersion() {
+            return info.getVersion();
+        }
+
+        /**
+         * Human readable string that identifies the language and version.
+         *
+         * @return string describing the specific language version
+         */
+        public String getShortName() {
+            return getName() + "(" + getVersion() + ")";
+        }
+
+        TruffleLanguage<?> getImpl(boolean create) {
+            getEnv(create);
+            return info.getImpl(false);
+        }
+
+        TruffleLanguage.Env getEnv(boolean create) {
+            if (env == null && create) {
+                env = SPI.attachEnv(PolyglotEngine.this, info.getImpl(true), out, err, in);
+            }
+            return env;
+        }
+
+        @Override
+        public String toString() {
+            return "[" + getShortName() + " for " + getMimeTypes() + "]";
+        }
+    } // end of Language
+
+    //
+    // Accessor helper methods
+    //
+
+    TruffleLanguage<?> findLanguage(Probe probe) {
+        Class<? extends TruffleLanguage> languageClazz = SPI.findLanguage(probe);
+        for (Map.Entry<String, Language> entrySet : langs.entrySet()) {
+            Language languageDescription = entrySet.getValue();
+            final TruffleLanguage<?> impl = languageDescription.getImpl(false);
+            if (languageClazz.isInstance(impl)) {
+                return impl;
+            }
+        }
+        throw new IllegalStateException("Cannot find language " + languageClazz + " among " + langs);
+    }
+
+    Env findEnv(Class<? extends TruffleLanguage> languageClazz) {
+        for (Map.Entry<String, Language> entrySet : langs.entrySet()) {
+            Language languageDescription = entrySet.getValue();
+            Env env = languageDescription.getEnv(false);
+            if (env != null && languageClazz.isInstance(languageDescription.getImpl(false))) {
+                return env;
+            }
+        }
+        throw new IllegalStateException("Cannot find language " + languageClazz + " among " + langs);
+    }
+
+    static DebugSupportProvider findDebuggerSupport(TruffleLanguage<?> l) {
+        return SPI.getDebugSupport(l);
+    }
+
+    private static class SPIAccessor extends Accessor {
+        @Override
+        public Object importSymbol(Object vmObj, TruffleLanguage<?> ownLang, String globalName) {
+            PolyglotEngine vm = (PolyglotEngine) vmObj;
+            Object g = vm.globals.get(globalName);
+            if (g != null) {
+                return g;
+            }
+            Set<Language> uniqueLang = new LinkedHashSet<>(vm.langs.values());
+            for (Language dl : uniqueLang) {
+                TruffleLanguage<?> l = dl.getImpl(false);
+                TruffleLanguage.Env env = dl.getEnv(false);
+                if (l == ownLang || l == null || env == null) {
+                    continue;
+                }
+                Object obj = SPI.findExportedSymbol(env, globalName, true);
+                if (obj != null) {
+                    return obj;
+                }
+            }
+            for (Language dl : uniqueLang) {
+                TruffleLanguage<?> l = dl.getImpl(false);
+                TruffleLanguage.Env env = dl.getEnv(false);
+                if (l == ownLang || l == null || env == null) {
+                    continue;
+                }
+                Object obj = SPI.findExportedSymbol(env, globalName, false);
+                if (obj != null) {
+                    return obj;
+                }
+            }
+            return null;
+        }
+
+        @Override
+        public Env attachEnv(Object obj, TruffleLanguage<?> language, Writer stdOut, Writer stdErr, Reader stdIn) {
+            PolyglotEngine vm = (PolyglotEngine) obj;
+            return super.attachEnv(vm, language, stdOut, stdErr, stdIn);
+        }
+
+        @Override
+        public Object eval(TruffleLanguage<?> l, Source s) throws IOException {
+            return super.eval(l, s);
+        }
+
+        @Override
+        public Object findExportedSymbol(TruffleLanguage.Env env, String globalName, boolean onlyExplicit) {
+            return super.findExportedSymbol(env, globalName, onlyExplicit);
+        }
+
+        @Override
+        protected Object languageGlobal(TruffleLanguage.Env env) {
+            return super.languageGlobal(env);
+        }
+
+        @Override
+        public ToolSupportProvider getToolSupport(TruffleLanguage<?> l) {
+            return super.getToolSupport(l);
+        }
+
+        @Override
+        public DebugSupportProvider getDebugSupport(TruffleLanguage<?> l) {
+            return super.getDebugSupport(l);
+        }
+
+        @Override
+        protected Class<? extends TruffleLanguage> findLanguage(Probe probe) {
+            return super.findLanguage(probe);
+        }
+
+        @Override
+        protected Env findLanguage(Object obj, Class<? extends TruffleLanguage> languageClass) {
+            PolyglotEngine vm = (PolyglotEngine) obj;
+            return vm.findEnv(languageClass);
+        }
+
+        @Override
+        protected Closeable executionStart(Object obj, Debugger[] fillIn, Source s) {
+            PolyglotEngine vm = (PolyglotEngine) obj;
+            return super.executionStart(vm, fillIn, s);
+        }
+
+        @Override
+        protected void dispatchEvent(Object obj, Object event) {
+            PolyglotEngine vm = (PolyglotEngine) obj;
+            vm.dispatch(event);
+        }
+    } // end of SPIAccessor
+}
--- a/truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/Portaal.java	Mon Sep 14 09:18:36 2015 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,872 +0,0 @@
-/*
- * Copyright (c) 2014, 2015, 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.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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.truffle.api.vm;
-
-import com.oracle.truffle.api.*;
-import com.oracle.truffle.api.TruffleLanguage.Env;
-import com.oracle.truffle.api.TruffleLanguage.Registration;
-import com.oracle.truffle.api.debug.*;
-import com.oracle.truffle.api.impl.*;
-import com.oracle.truffle.api.instrument.*;
-import com.oracle.truffle.api.interop.TruffleObject;
-import com.oracle.truffle.api.interop.java.JavaInterop;
-import com.oracle.truffle.api.source.*;
-import java.io.*;
-import java.net.*;
-import java.nio.file.*;
-import java.util.*;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.Executor;
-import java.util.logging.*;
-
-/**
- * Gate way into the world of {@link TruffleLanguage Truffle languages}. {@link #createNew()
- * Instantiate} your own portal into the isolated, multi language system with all the registered
- * languages ready for your use. A {@link Portaal} runs inside of a <em>JVM</em>, there can however
- * be multiple instances (some would say tenants) of {@link Portaal} running next to each other in a
- * single <em>JVM</em> with a complete mutual isolation. There is 1:N mapping between <em>JVM</em>
- * and {@link Portaal}.
- * <p>
- * It would not be correct to think of a {@link Portaal} as a runtime for a single
- * {@link TruffleLanguage Truffle language} (Ruby, Python, R, C, JavaScript, etc.) either.
- * {@link Portaal} can host as many of Truffle languages as {@link Registration registered on a
- * class path} of your <em>JVM</em> application. {@link Portaal} orchestrates these languages,
- * manages exchange of objects and calls among them. While it may happen that there is just one
- * activated language inside of a {@link Portaal}, the greatest strength of {@link Portaal} is in
- * inter-operability between all Truffle languages. There is 1:N mapping between {@link Portaal} and
- * {@link TruffleLanguage Truffle language implementations}.
- * <p>
- * Use {@link #createNew()} to create new isolated portal ready for execution of various languages.
- * All the languages in a single portal see each other exported global symbols and can cooperate.
- * Use {@link #createNew()} multiple times to create different, isolated portal environment
- * completely separated from each other.
- * <p>
- * Once instantiated use {@link #eval(java.net.URI)} with a reference to a file or URL or directly
- * pass code snippet into the virtual machine via {@link #eval(java.lang.String, java.lang.String)}.
- * Support for individual languages is initialized on demand - e.g. once a file of certain MIME type
- * is about to be processed, its appropriate engine (if found), is initialized. Once an engine gets
- * initialized, it remains so, until the virtual machine isn't garbage collected.
- * <p>
- * The <code>TruffleVM</code> is single-threaded and tries to enforce that. It records the thread it
- * has been {@link Builder#build() created} by and checks that all subsequent calls are coming from
- * the same thread. There is 1:1 mapping between {@link Portaal} and a thread that can tell it what
- * to do.
- */
-@SuppressWarnings("rawtypes")
-public class Portaal {
-    static final Logger LOG = Logger.getLogger(Portaal.class.getName());
-    private static final SPIAccessor SPI = new SPIAccessor();
-    private final Thread initThread;
-    private final Executor executor;
-    private final Map<String, Language> langs;
-    private final Reader in;
-    private final Writer err;
-    private final Writer out;
-    private final EventConsumer<?>[] handlers;
-    private final Map<String, Object> globals;
-    private Debugger debugger;
-
-    /**
-     * Private & temporary only constructor.
-     */
-    Portaal() {
-        this.initThread = null;
-        this.in = null;
-        this.err = null;
-        this.out = null;
-        this.langs = null;
-        this.handlers = null;
-        this.globals = null;
-        this.executor = null;
-    }
-
-    /**
-     * Real constructor used from the builder.
-     */
-    Portaal(Executor executor, Map<String, Object> globals, Writer out, Writer err, Reader in, EventConsumer<?>[] handlers) {
-        this.executor = executor;
-        this.out = out;
-        this.err = err;
-        this.in = in;
-        this.handlers = handlers;
-        this.initThread = Thread.currentThread();
-        this.globals = new HashMap<>(globals);
-        Map<String, Language> map = new HashMap<>();
-        for (Map.Entry<String, LanguageCache> en : LanguageCache.languages().entrySet()) {
-            map.put(en.getKey(), createLanguage(en));
-        }
-        this.langs = map;
-    }
-
-    /**
-     * Creation of new Truffle virtual machine. Use the {@link Builder} methods to configure your
-     * virtual machine and then create one using {@link Builder#build()}:
-     *
-     * <pre>
-     * {@link Portaal} vm = {@link Portaal}.{@link Portaal#createNew() createNew()}
-     *     .{@link Builder#stdOut(java.io.Writer) stdOut}({@link Writer yourWriter})
-     *     .{@link Builder#stdErr(java.io.Writer) stdErr}({@link Writer yourWriter})
-     *     .{@link Builder#stdIn(java.io.Reader) stdIn}({@link Reader yourReader})
-     *     .{@link Builder#build() build()};
-     * </pre>
-     *
-     * It searches for {@link Registration languages registered} in the system class loader and
-     * makes them available for later evaluation via
-     * {@link #eval(java.lang.String, java.lang.String)} methods.
-     *
-     * @return new, isolated virtual machine with pre-registered languages
-     */
-    public static Portaal.Builder createNew() {
-        // making Builder non-static inner class is a
-        // nasty trick to avoid the Builder class to appear
-        // in Javadoc next to TruffleVM class
-        Portaal vm = new Portaal();
-        return vm.new Builder();
-    }
-
-    /**
-     * Builder for a new {@link Portaal}. Call various configuration methods in a chain and at the
-     * end create new {@link Portaal virtual machine}:
-     *
-     * <pre>
-     * {@link Portaal} vm = {@link Portaal}.{@link Portaal#createNew() createNew()}
-     *     .{@link Builder#stdOut(java.io.Writer) stdOut}({@link Writer yourWriter})
-     *     .{@link Builder#stdErr(java.io.Writer) stdErr}({@link Writer yourWriter})
-     *     .{@link Builder#stdIn(java.io.Reader) stdIn}({@link Reader yourReader})
-     *     .{@link Builder#build() build()};
-     * </pre>
-     */
-    public class Builder {
-        private Writer out;
-        private Writer err;
-        private Reader in;
-        private final List<EventConsumer<?>> handlers = new ArrayList<>();
-        private final Map<String, Object> globals = new HashMap<>();
-        private Executor executor;
-
-        Builder() {
-        }
-
-        /**
-         * Changes the default output for languages running in <em>to be created</em>
-         * {@link Portaal virtual machine}. The default is to use {@link System#out}.
-         *
-         * @param w the writer to use as output
-         * @return instance of this builder
-         */
-        public Builder stdOut(Writer w) {
-            out = w;
-            return this;
-        }
-
-        /**
-         * Changes the error output for languages running in <em>to be created</em> {@link Portaal
-         * virtual machine}. The default is to use {@link System#err}.
-         *
-         * @param w the writer to use as output
-         * @return instance of this builder
-         */
-        public Builder stdErr(Writer w) {
-            err = w;
-            return this;
-        }
-
-        /**
-         * Changes the default input for languages running in <em>to be created</em> {@link Portaal
-         * virtual machine}. The default is to use {@link System#out}.
-         *
-         * @param r the reader to use as input
-         * @return instance of this builder
-         */
-        public Builder stdIn(Reader r) {
-            in = r;
-            return this;
-        }
-
-        /**
-         * Registers another instance of {@link EventConsumer} into the to be created
-         * {@link Portaal}.
-         *
-         * @param handler the handler to register
-         * @return instance of this builder
-         */
-        public Builder onEvent(EventConsumer<?> handler) {
-            handler.getClass();
-            handlers.add(handler);
-            return this;
-        }
-
-        /**
-         * Adds global named symbol into the configuration of to-be-built {@link Portaal}. This
-         * symbol will be accessible to all languages via {@link Env#importSymbol(java.lang.String)}
-         * and will take precedence over {@link TruffleLanguage#findExportedSymbol symbols exported
-         * by languages itself}. Repeated use of <code>globalSymbol</code> is possible; later
-         * definition of the same name overrides the previous one.
-         *
-         * @param name name of the symbol to register
-         * @param obj value of the object - expected to be primitive wrapper, {@link String} or
-         *            <code>TruffleObject</code> for mutual inter-operability
-         * @return instance of this builder
-         * @see Portaal#findGlobalSymbol(java.lang.String)
-         */
-        public Builder globalSymbol(String name, Object obj) {
-            globals.put(name, obj);
-            return this;
-        }
-
-        /**
-         * Provides own executor for running {@link Portaal} scripts. By default
-         * {@link Portaal#eval(com.oracle.truffle.api.source.Source)} and
-         * {@link Value#invoke(java.lang.Object, java.lang.Object[])} are executed synchronously in
-         * the calling thread. Sometimes, however it is more beneficial to run them asynchronously -
-         * the easiest way to do so is to provide own executor when configuring the {
-         * {@link #executor(java.util.concurrent.Executor) the builder}. The executor is expected to
-         * execute all {@link Runnable runnables} passed into its
-         * {@link Executor#execute(java.lang.Runnable)} method in the order they arrive and in a
-         * single (yet arbitrary) thread.
-         *
-         * @param executor the executor to use for internal execution inside the {@link #build() to
-         *            be created} {@link Portaal}
-         * @return instance of this builder
-         */
-        @SuppressWarnings("hiding")
-        public Builder executor(Executor executor) {
-            this.executor = executor;
-            return this;
-        }
-
-        /**
-         * Creates the {@link Portaal Truffle virtual machine}. The configuration is taken from
-         * values passed into configuration methods in this class.
-         *
-         * @return new, isolated virtual machine with pre-registered languages
-         */
-        @SuppressWarnings("deprecation")
-        public Portaal build() {
-            if (out == null) {
-                out = new OutputStreamWriter(System.out);
-            }
-            if (err == null) {
-                err = new OutputStreamWriter(System.err);
-            }
-            if (in == null) {
-                in = new InputStreamReader(System.in);
-            }
-            Executor nonNullExecutor = executor != null ? executor : new Executor() {
-                @Override
-                public void execute(Runnable command) {
-                    command.run();
-                }
-            };
-            return new TruffleVM(nonNullExecutor, globals, out, err, in, handlers.toArray(new EventConsumer[0]));
-        }
-    }
-
-    /**
-     * Descriptions of languages supported in this Truffle virtual machine.
-     *
-     * @return an immutable map with keys being MIME types and values the {@link Language
-     *         descriptions} of associated languages
-     */
-    public Map<String, ? extends Language> getLanguages() {
-        return Collections.unmodifiableMap(langs);
-    }
-
-    /**
-     * Evaluates file located on a given URL. Is equivalent to loading the content of a file and
-     * executing it via {@link #eval(java.lang.String, java.lang.String)} with a MIME type guess
-     * based on the file's extension and/or content.
-     *
-     * @param location the location of a file to execute
-     * @return result of a processing the file, possibly <code>null</code>
-     * @throws IOException exception to signal I/O problems or problems with processing the file's
-     *             content
-     * @deprecated use {@link #eval(com.oracle.truffle.api.source.Source)}
-     */
-    @Deprecated
-    public Object eval(URI location) throws IOException {
-        checkThread();
-        Source s;
-        String mimeType;
-        if (location.getScheme().equals("file")) {
-            File file = new File(location);
-            s = Source.fromFileName(file.getPath(), true);
-            if (file.getName().endsWith(".c")) {
-                mimeType = "text/x-c";
-            } else if (file.getName().endsWith(".sl")) {
-                mimeType = "application/x-sl";
-            } else if (file.getName().endsWith(".R") || file.getName().endsWith(".r")) {
-                mimeType = "application/x-r";
-            } else {
-                mimeType = Files.probeContentType(file.toPath());
-            }
-        } else {
-            URL url = location.toURL();
-            s = Source.fromURL(url, location.toString());
-            URLConnection conn = url.openConnection();
-            mimeType = conn.getContentType();
-        }
-        Language l = langs.get(mimeType);
-        if (l == null) {
-            throw new IOException("No language for " + location + " with MIME type " + mimeType + " found. Supported types: " + langs.keySet());
-        }
-        return eval(l, s).get();
-    }
-
-    /**
-     * Evaluates code snippet. Chooses a language registered for a given MIME type (throws
-     * {@link IOException} if there is none). And passes the specified code to it for execution.
-     *
-     * @param mimeType MIME type of the code snippet - chooses the right language
-     * @param reader the source of code snippet to execute
-     * @return result of an execution, possibly <code>null</code>
-     * @throws IOException thrown to signal errors while processing the code
-     * @deprecated use {@link #eval(com.oracle.truffle.api.source.Source)}
-     */
-    @Deprecated
-    public Object eval(String mimeType, Reader reader) throws IOException {
-        checkThread();
-        Language l = langs.get(mimeType);
-        if (l == null) {
-            throw new IOException("No language for MIME type " + mimeType + " found. Supported types: " + langs.keySet());
-        }
-        return eval(l, Source.fromReader(reader, mimeType)).get();
-    }
-
-    /**
-     * Evaluates code snippet. Chooses a language registered for a given MIME type (throws
-     * {@link IOException} if there is none). And passes the specified code to it for execution.
-     *
-     * @param mimeType MIME type of the code snippet - chooses the right language
-     * @param code the code snippet to execute
-     * @return result of an execution, possibly <code>null</code>
-     * @throws IOException thrown to signal errors while processing the code
-     * @deprecated use {@link #eval(com.oracle.truffle.api.source.Source)}
-     */
-    @Deprecated
-    public Object eval(String mimeType, String code) throws IOException {
-        checkThread();
-        Language l = langs.get(mimeType);
-        if (l == null) {
-            throw new IOException("No language for MIME type " + mimeType + " found. Supported types: " + langs.keySet());
-        }
-        return eval(l, Source.fromText(code, mimeType)).get();
-    }
-
-    /**
-     * Evaluates provided source. Chooses language registered for a particular
-     * {@link Source#getMimeType() MIME type} (throws {@link IOException} if there is none). The
-     * language is then allowed to parse and execute the source.
-     *
-     * @param source code snippet to execute
-     * @return a {@link Value} object that holds result of an execution, never <code>null</code>
-     * @throws IOException thrown to signal errors while processing the code
-     */
-    public Value eval(Source source) throws IOException {
-        String mimeType = source.getMimeType();
-        checkThread();
-        Language l = langs.get(mimeType);
-        if (l == null) {
-            throw new IOException("No language for MIME type " + mimeType + " found. Supported types: " + langs.keySet());
-        }
-        return eval(l, source);
-    }
-
-    private Value eval(final Language l, final Source s) throws IOException {
-        final Debugger[] fillIn = {debugger};
-        final Object[] result = {null, null};
-        final CountDownLatch ready = new CountDownLatch(1);
-        final TruffleLanguage[] lang = {null};
-        executor.execute(new Runnable() {
-            @Override
-            public void run() {
-                evalImpl(fillIn, lang, s, result, l, ready);
-            }
-        });
-        exceptionCheck(result);
-        return createValue(lang[0], result, ready);
-    }
-
-    Value createValue(TruffleLanguage lang, Object[] result, CountDownLatch ready) {
-        return new Value(lang, result, ready);
-    }
-    Language createLanguage(Map.Entry<String, LanguageCache> en) {
-        return new Language(en.getValue());
-    }
-
-
-    @SuppressWarnings("try")
-    private void evalImpl(Debugger[] fillIn, TruffleLanguage<?>[] fillLang, Source s, Object[] result, Language l, CountDownLatch ready) {
-        try (Closeable d = SPI.executionStart(this, fillIn, s)) {
-            TruffleLanguage<?> langImpl = l.getImpl(true);
-            fillLang[0] = langImpl;
-            Portaal.findDebuggerSupport(langImpl);
-            if (debugger == null) {
-                debugger = fillIn[0];
-            }
-            result[0] = SPI.eval(langImpl, s);
-        } catch (IOException ex) {
-            result[1] = ex;
-        } finally {
-            ready.countDown();
-        }
-    }
-
-    /**
-     * Looks global symbol provided by one of initialized languages up. First of all execute your
-     * program via one of your {@link #eval(java.lang.String, java.lang.String)} and then look
-     * expected symbol up using this method.
-     * <p>
-     * The names of the symbols are language dependent, but for example the Java language bindings
-     * follow the specification for method references:
-     * <ul>
-     * <li>"java.lang.Exception::new" is a reference to constructor of {@link Exception}
-     * <li>"java.lang.Integer::valueOf" is a reference to static method in {@link Integer} class
-     * </ul>
-     * Once an symbol is obtained, it remembers values for fast access and is ready for being
-     * invoked.
-     *
-     * @param globalName the name of the symbol to find
-     * @return found symbol or <code>null</code> if it has not been found
-     */
-    public Value findGlobalSymbol(final String globalName) {
-        checkThread();
-        final TruffleLanguage<?>[] lang = {null};
-        final Object[] obj = {globals.get(globalName), null};
-        final CountDownLatch ready = new CountDownLatch(1);
-        if (obj[0] == null) {
-            executor.execute(new Runnable() {
-                @Override
-                public void run() {
-                    findGlobalSymbolImpl(obj, globalName, lang, ready);
-                }
-            });
-            try {
-                ready.await();
-            } catch (InterruptedException ex) {
-                LOG.log(Level.SEVERE, null, ex);
-            }
-        } else {
-            ready.countDown();
-        }
-        return obj[0] == null ? null : createValue(lang[0], obj, ready);
-    }
-
-    private void findGlobalSymbolImpl(Object[] obj, String globalName, TruffleLanguage<?>[] lang, CountDownLatch ready) {
-        if (obj[0] == null) {
-            for (Language dl : langs.values()) {
-                TruffleLanguage.Env env = dl.getEnv(false);
-                if (env == null) {
-                    continue;
-                }
-                obj[0] = SPI.findExportedSymbol(env, globalName, true);
-                if (obj[0] != null) {
-                    lang[0] = dl.getImpl(true);
-                    break;
-                }
-            }
-        }
-        if (obj[0] == null) {
-            for (Language dl : langs.values()) {
-                TruffleLanguage.Env env = dl.getEnv(false);
-                if (env == null) {
-                    continue;
-                }
-                obj[0] = SPI.findExportedSymbol(env, globalName, true);
-                if (obj[0] != null) {
-                    lang[0] = dl.getImpl(true);
-                    break;
-                }
-            }
-        }
-        ready.countDown();
-    }
-
-    private void checkThread() {
-        if (initThread != Thread.currentThread()) {
-            throw new IllegalStateException("TruffleVM created on " + initThread.getName() + " but used on " + Thread.currentThread().getName());
-        }
-    }
-
-    @SuppressWarnings("unchecked")
-    void dispatch(Object ev) {
-        Class type = ev.getClass();
-        if (type == SuspendedEvent.class) {
-            dispatchSuspendedEvent((SuspendedEvent) ev);
-        }
-        if (type == ExecutionEvent.class) {
-            dispatchExecutionEvent((ExecutionEvent) ev);
-        }
-        dispatch(type, ev);
-    }
-
-    @SuppressWarnings("unused")
-    void dispatchSuspendedEvent(SuspendedEvent event) {
-    }
-
-    @SuppressWarnings("unused")
-    void dispatchExecutionEvent(ExecutionEvent event) {
-    }
-
-    @SuppressWarnings("unchecked")
-    <Event> void dispatch(Class<Event> type, Event event) {
-        for (EventConsumer handler : handlers) {
-            if (handler.type == type) {
-                handler.on(event);
-            }
-        }
-    }
-
-    static void exceptionCheck(Object[] result) throws RuntimeException, IOException {
-        if (result[1] instanceof IOException) {
-            throw (IOException) result[1];
-        }
-        if (result[1] instanceof RuntimeException) {
-            throw (RuntimeException) result[1];
-        }
-    }
-
-    /**
-     * A future value wrapper. A user level wrapper around values returned by evaluation of various
-     * {@link Portaal} functions like {@link Portaal#findGlobalSymbol(java.lang.String)} and
-     * {@link Portaal#eval(com.oracle.truffle.api.source.Source)} or value returned by
-     * {@link #invoke(java.lang.Object, java.lang.Object...) sbbsequent of execution}. In case the
-     * {@link Portaal} has been initialized for
-     * {@link Builder#executor(java.util.concurrent.Executor) asynchronous excution}, the
-     * {@link Value} represents a future - e.g. it is returned immediately, leaving the execution
-     * running on behind.
-     */
-    public class Value {
-        private final TruffleLanguage<?> language;
-        private final Object[] result;
-        private final CountDownLatch ready;
-        private CallTarget target;
-
-        Value(TruffleLanguage<?> language, Object[] result, CountDownLatch ready) {
-            this.language = language;
-            this.result = result;
-            this.ready = ready;
-        }
-
-        /**
-         * Obtains the object represented by this symbol. The <em>raw</em> object can either be a
-         * wrapper about primitive type (e.g. {@link Number}, {@link String}, {@link Character},
-         * {@link Boolean}) or a <em>TruffleObject</em> representing more complex object from a
-         * language. The method can return <code>null</code>.
-         *
-         * @return the object or <code>null</code>
-         * @throws IOException in case it is not possible to obtain the value of the object
-         */
-        public Object get() throws IOException {
-            waitForSymbol();
-            exceptionCheck(result);
-            return result[0];
-        }
-
-        /**
-         * Obtains Java view of the object represented by this symbol. The method basically
-         * delegates to
-         * {@link JavaInterop#asJavaObject(java.lang.Class, com.oracle.truffle.api.interop.TruffleObject)}
-         * just handles primitive types as well.
-         * 
-         * @param <T> the type of the view one wants to obtain
-         * @param representation the class of the view interface (it has to be an interface)
-         * @return instance of the view wrapping the object of this symbol
-         * @throws IOException in case it is not possible to obtain the value of the object
-         * @throws ClassCastException if the value cannot be converted to desired view
-         */
-        public <T> T as(Class<T> representation) throws IOException {
-            Object obj = get();
-            if (representation.isInstance(obj)) {
-                return representation.cast(obj);
-            }
-            return JavaInterop.asJavaObject(representation, (TruffleObject) obj);
-        }
-
-        /**
-         * Invokes the symbol. If the symbol represents a function, then it should be invoked with
-         * provided arguments. If the symbol represents a field, then first argument (if provided)
-         * should set the value to the field; the return value should be the actual value of the
-         * field when the <code>invoke</code> method returns.
-         *
-         * @param thiz this/self in language that support such concept; use <code>null</code> to let
-         *            the language use default this/self or ignore the value
-         * @param args arguments to pass when invoking the symbol
-         * @return symbol wrapper around the value returned by invoking the symbol, never
-         *         <code>null</code>
-         * @throws IOException signals problem during execution
-         */
-        public Value invoke(final Object thiz, final Object... args) throws IOException {
-            get();
-            final Debugger[] fillIn = {debugger};
-            final CountDownLatch done = new CountDownLatch(1);
-            final Object[] res = {null, null};
-            executor.execute(new Runnable() {
-                @Override
-                public void run() {
-                    invokeImpl(fillIn, thiz, args, res, done);
-                }
-            });
-            exceptionCheck(res);
-            return createValue(language, res, done);
-        }
-
-        @SuppressWarnings("try")
-        private void invokeImpl(Debugger[] fillIn, Object thiz, Object[] args, Object[] res, CountDownLatch done) {
-            try (final Closeable c = SPI.executionStart(Portaal.this, fillIn, null)) {
-                if (debugger == null) {
-                    debugger = fillIn[0];
-                }
-                List<Object> arr = new ArrayList<>();
-                if (thiz == null && language != null) {
-                    Object global = SPI.languageGlobal(SPI.findLanguage(Portaal.this, language.getClass()));
-                    if (global != null) {
-                        arr.add(global);
-                    }
-                } else {
-                    arr.add(thiz);
-                }
-                arr.addAll(Arrays.asList(args));
-                for (;;) {
-                    try {
-                        if (target == null) {
-                            target = SymbolInvokerImpl.createCallTarget(language, result[0], arr.toArray());
-                        }
-                        res[0] = target.call(arr.toArray());
-                        break;
-                    } catch (ArgumentsMishmashException ex) {
-                        target = null;
-                    }
-                }
-            } catch (IOException ex) {
-                res[1] = ex;
-            } catch (RuntimeException ex) {
-                res[1] = ex;
-            } finally {
-                done.countDown();
-            }
-        }
-
-        private void waitForSymbol() throws InterruptedIOException {
-            checkThread();
-            try {
-                ready.await();
-            } catch (InterruptedException ex) {
-                throw (InterruptedIOException) new InterruptedIOException(ex.getMessage()).initCause(ex);
-            }
-        }
-    }
-
-    /**
-     * Description of a language registered in {@link Portaal Truffle virtual machine}. Languages
-     * are registered by {@link Registration} annotation which stores necessary information into a
-     * descriptor inside of the language's JAR file. When a new {@link Portaal} is created, it reads
-     * all available descriptors and creates {@link Language} objects to represent them. One can
-     * obtain a {@link #getName() name} or list of supported {@link #getMimeTypes() MIME types} for
-     * each language. The actual language implementation is not initialized until
-     * {@link Portaal#eval(java.lang.String, java.lang.String) a code is evaluated} in it.
-     */
-    public class Language {
-        private final LanguageCache info;
-        private TruffleLanguage.Env env;
-
-        Language(LanguageCache info) {
-            this.info = info;
-        }
-
-        /**
-         * MIME types recognized by the language.
-         *
-         * @return returns immutable set of recognized MIME types
-         */
-        public Set<String> getMimeTypes() {
-            return info.getMimeTypes();
-        }
-
-        /**
-         * Human readable name of the language. Think of C, Ruby, JS, etc.
-         *
-         * @return string giving the language a name
-         */
-        public String getName() {
-            return info.getName();
-        }
-
-        /**
-         * Name of the language version.
-         *
-         * @return string specifying the language version
-         */
-        public String getVersion() {
-            return info.getVersion();
-        }
-
-        /**
-         * Human readable string that identifies the language and version.
-         *
-         * @return string describing the specific language version
-         */
-        public String getShortName() {
-            return getName() + "(" + getVersion() + ")";
-        }
-
-        TruffleLanguage<?> getImpl(boolean create) {
-            getEnv(create);
-            return info.getImpl(false);
-        }
-
-        TruffleLanguage.Env getEnv(boolean create) {
-            if (env == null && create) {
-                env = SPI.attachEnv(Portaal.this, info.getImpl(true), out, err, in);
-            }
-            return env;
-        }
-
-        @Override
-        public String toString() {
-            return "[" + getShortName() + " for " + getMimeTypes() + "]";
-        }
-    } // end of Language
-
-    //
-    // Accessor helper methods
-    //
-
-    TruffleLanguage<?> findLanguage(Probe probe) {
-        Class<? extends TruffleLanguage> languageClazz = SPI.findLanguage(probe);
-        for (Map.Entry<String, Language> entrySet : langs.entrySet()) {
-            Language languageDescription = entrySet.getValue();
-            final TruffleLanguage<?> impl = languageDescription.getImpl(false);
-            if (languageClazz.isInstance(impl)) {
-                return impl;
-            }
-        }
-        throw new IllegalStateException("Cannot find language " + languageClazz + " among " + langs);
-    }
-
-    Env findEnv(Class<? extends TruffleLanguage> languageClazz) {
-        for (Map.Entry<String, Language> entrySet : langs.entrySet()) {
-            Language languageDescription = entrySet.getValue();
-            Env env = languageDescription.getEnv(false);
-            if (env != null && languageClazz.isInstance(languageDescription.getImpl(false))) {
-                return env;
-            }
-        }
-        throw new IllegalStateException("Cannot find language " + languageClazz + " among " + langs);
-    }
-
-    static DebugSupportProvider findDebuggerSupport(TruffleLanguage<?> l) {
-        return SPI.getDebugSupport(l);
-    }
-
-    private static class SPIAccessor extends Accessor {
-        @Override
-        public Object importSymbol(Object vmObj, TruffleLanguage<?> ownLang, String globalName) {
-            Portaal vm = (Portaal) vmObj;
-            Object g = vm.globals.get(globalName);
-            if (g != null) {
-                return g;
-            }
-            Set<Language> uniqueLang = new LinkedHashSet<>(vm.langs.values());
-            for (Language dl : uniqueLang) {
-                TruffleLanguage<?> l = dl.getImpl(false);
-                TruffleLanguage.Env env = dl.getEnv(false);
-                if (l == ownLang || l == null || env == null) {
-                    continue;
-                }
-                Object obj = SPI.findExportedSymbol(env, globalName, true);
-                if (obj != null) {
-                    return obj;
-                }
-            }
-            for (Language dl : uniqueLang) {
-                TruffleLanguage<?> l = dl.getImpl(false);
-                TruffleLanguage.Env env = dl.getEnv(false);
-                if (l == ownLang || l == null || env == null) {
-                    continue;
-                }
-                Object obj = SPI.findExportedSymbol(env, globalName, false);
-                if (obj != null) {
-                    return obj;
-                }
-            }
-            return null;
-        }
-
-        @Override
-        public Env attachEnv(Object obj, TruffleLanguage<?> language, Writer stdOut, Writer stdErr, Reader stdIn) {
-            Portaal vm = (Portaal) obj;
-            return super.attachEnv(vm, language, stdOut, stdErr, stdIn);
-        }
-
-        @Override
-        public Object eval(TruffleLanguage<?> l, Source s) throws IOException {
-            return super.eval(l, s);
-        }
-
-        @Override
-        public Object findExportedSymbol(TruffleLanguage.Env env, String globalName, boolean onlyExplicit) {
-            return super.findExportedSymbol(env, globalName, onlyExplicit);
-        }
-
-        @Override
-        protected Object languageGlobal(TruffleLanguage.Env env) {
-            return super.languageGlobal(env);
-        }
-
-        @Override
-        public ToolSupportProvider getToolSupport(TruffleLanguage<?> l) {
-            return super.getToolSupport(l);
-        }
-
-        @Override
-        public DebugSupportProvider getDebugSupport(TruffleLanguage<?> l) {
-            return super.getDebugSupport(l);
-        }
-
-        @Override
-        protected Class<? extends TruffleLanguage> findLanguage(Probe probe) {
-            return super.findLanguage(probe);
-        }
-
-        @Override
-        protected Env findLanguage(Object obj, Class<? extends TruffleLanguage> languageClass) {
-            Portaal vm = (Portaal) obj;
-            return vm.findEnv(languageClass);
-        }
-
-        @Override
-        protected Closeable executionStart(Object obj, Debugger[] fillIn, Source s) {
-            Portaal vm = (Portaal) obj;
-            return super.executionStart(vm, fillIn, s);
-        }
-
-        @Override
-        protected void dispatchEvent(Object obj, Object event) {
-            Portaal vm = (Portaal) obj;
-            vm.dispatch(event);
-        }
-    } // end of SPIAccessor
-}
--- a/truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/TruffleVM.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/TruffleVM.java	Mon Sep 21 10:34:30 2015 +0200
@@ -37,7 +37,7 @@
  */
 @Deprecated
 @SuppressWarnings({"rawtypes", "deprecated"})
-public final class TruffleVM extends Portaal {
+public final class TruffleVM extends PolyglotEngine {
     private TruffleVM() {
         super();
     }
@@ -56,7 +56,7 @@
     }
 
     @Deprecated
-    public final class Builder extends Portaal.Builder {
+    public final class Builder extends PolyglotEngine.Builder {
         Builder() {
         }
 
@@ -150,7 +150,7 @@
     }
 
     @Deprecated
-    public final class Language extends Portaal.Language {
+    public final class Language extends PolyglotEngine.Language {
         Language(LanguageCache info) {
             super(info);
         }
--- a/truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/SLTckTest.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/SLTckTest.java	Mon Sep 21 10:34:30 2015 +0200
@@ -42,7 +42,7 @@
 
 import com.oracle.truffle.api.source.Source;
 import com.oracle.truffle.tck.TruffleTCK;
-import com.oracle.truffle.api.vm.Portaal;
+import com.oracle.truffle.api.vm.PolyglotEngine;
 import static org.junit.Assert.*;
 import org.junit.Test;
 
@@ -53,13 +53,13 @@
 public class SLTckTest extends TruffleTCK {
     @Test
     public void testVerifyPresence() {
-        Portaal vm = Portaal.createNew().build();
+        PolyglotEngine vm = PolyglotEngine.createNew().build();
         assertTrue("Our language is present", vm.getLanguages().containsKey("application/x-sl"));
     }
 
     @Override
-    protected Portaal prepareVM() throws Exception {
-        Portaal vm = Portaal.createNew().build();
+    protected PolyglotEngine prepareVM() throws Exception {
+        PolyglotEngine vm = PolyglotEngine.createNew().build();
         // @formatter:off
         vm.eval(
             Source.fromText(
--- a/truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/SLTestRunner.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/SLTestRunner.java	Mon Sep 21 10:34:30 2015 +0200
@@ -218,7 +218,7 @@
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         PrintWriter printer = new PrintWriter(out);
         try {
-            Portaal vm = Portaal.createNew().stdIn(new BufferedReader(new StringReader(repeat(testCase.testInput, repeats)))).stdOut(printer).build();
+            PolyglotEngine vm = PolyglotEngine.createNew().stdIn(new BufferedReader(new StringReader(repeat(testCase.testInput, repeats)))).stdOut(printer).build();
 
             String script = readAllLines(testCase.path);
             SLLanguage.run(vm, testCase.path, null, printer, repeats, builtins);
--- a/truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/instrument/SLInstrumentTestRunner.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/instrument/SLInstrumentTestRunner.java	Mon Sep 21 10:34:30 2015 +0200
@@ -227,7 +227,7 @@
             // We use the name of the file to determine what visitor to attach to it.
             if (testCase.baseName.endsWith(ASSIGNMENT_VALUE_SUFFIX)) {
                 // Set up the execution context for Simple and register our two listeners
-                Portaal vm = Portaal.createNew().stdIn(new BufferedReader(new StringReader(testCase.testInput))).stdOut(printer).build();
+                PolyglotEngine vm = PolyglotEngine.createNew().stdIn(new BufferedReader(new StringReader(testCase.testInput))).stdOut(printer).build();
 
                 final String src = readAllLines(testCase.path);
                 vm.eval(Source.fromText(src, testCase.path.toString()).withMimeType("application/x-sl"));
@@ -238,7 +238,7 @@
                     probe.attach(Instrument.create(slPrintAssigmentValueListener, "SL print assignment value"));
                 }
 
-                Portaal.Value main = vm.findGlobalSymbol("main");
+                PolyglotEngine.Value main = vm.findGlobalSymbol("main");
                 main.invoke(null);
             } else {
                 notifier.fireTestFailure(new Failure(testCase.name, new UnsupportedOperationException("No instrumentation found.")));
--- a/truffle/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLHandler.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLHandler.java	Mon Sep 21 10:34:30 2015 +0200
@@ -127,9 +127,9 @@
             if (!file.canRead()) {
                 return finishReplyFailed(reply, "can't find file \"" + fileName + "\"");
             }
-            final Portaal vm = serverContext.vm();
+            final PolyglotEngine vm = serverContext.vm();
             vm.eval(Source.fromFileName(file.getPath()));
-            Portaal.Value main = vm.findGlobalSymbol("main");
+            PolyglotEngine.Value main = vm.findGlobalSymbol("main");
             if (main != null) {
                 main.invoke(null);
             }
--- a/truffle/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLServer.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.sl.tools/src/com/oracle/truffle/sl/tools/debug/SLREPLServer.java	Mon Sep 21 10:34:30 2015 +0200
@@ -50,7 +50,7 @@
 import com.oracle.truffle.api.instrument.*;
 import com.oracle.truffle.api.source.*;
 import com.oracle.truffle.api.vm.*;
-import com.oracle.truffle.api.vm.Portaal.Language;
+import com.oracle.truffle.api.vm.PolyglotEngine.Language;
 import com.oracle.truffle.sl.*;
 import com.oracle.truffle.sl.nodes.instrument.SLDefaultVisualizer;
 import com.oracle.truffle.tools.debug.shell.*;
@@ -85,7 +85,7 @@
     }
 
     private final Language language;
-    private final Portaal vm;
+    private final PolyglotEngine vm;
     private Debugger db;
     private final String statusPrefix;
     private final Map<String, REPLHandler> handlerMap = new HashMap<>();
@@ -135,7 +135,7 @@
             }
         };
 
-        Portaal newVM = Portaal.createNew().onEvent(onHalted).onEvent(onExec).build();
+        PolyglotEngine newVM = PolyglotEngine.createNew().onEvent(onHalted).onEvent(onExec).build();
         this.language = newVM.getLanguages().get("application/x-sl");
         assert language != null;
 
@@ -210,7 +210,7 @@
         }
 
         @Override
-        public Portaal vm() {
+        public PolyglotEngine vm() {
             return vm;
         }
 
--- a/truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLLanguage.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLLanguage.java	Mon Sep 21 10:34:30 2015 +0200
@@ -48,7 +48,7 @@
 import com.oracle.truffle.api.nodes.*;
 import com.oracle.truffle.api.source.*;
 import com.oracle.truffle.api.vm.*;
-import com.oracle.truffle.api.vm.Portaal.Value;
+import com.oracle.truffle.api.vm.PolyglotEngine.Value;
 import com.oracle.truffle.sl.builtins.*;
 import com.oracle.truffle.sl.nodes.*;
 import com.oracle.truffle.sl.nodes.call.*;
@@ -180,7 +180,7 @@
      * The main entry point. Use the mx command "mx sl" to run it with the correct class path setup.
      */
     public static void main(String[] args) throws IOException {
-        Portaal vm = Portaal.createNew().build();
+        PolyglotEngine vm = PolyglotEngine.createNew().build();
         assert vm.getLanguages().containsKey("application/x-sl");
 
         setupToolDemos();
@@ -211,7 +211,7 @@
      * Temporary method during API evolution, supports debugger integration.
      */
     public static void run(Source source) throws IOException {
-        Portaal vm = Portaal.createNew().build();
+        PolyglotEngine vm = PolyglotEngine.createNew().build();
         assert vm.getLanguages().containsKey("application/x-sl");
         vm.eval(source);
         Value main = vm.findGlobalSymbol("main");
@@ -225,7 +225,7 @@
      * Parse and run the specified SL source. Factored out in a separate method so that it can also
      * be used by the unit test harness.
      */
-    public static long run(Portaal context, Path path, PrintWriter logOutput, PrintWriter out, int repeats, List<NodeFactory<? extends SLBuiltinNode>> currentBuiltins) throws IOException {
+    public static long run(PolyglotEngine context, Path path, PrintWriter logOutput, PrintWriter out, int repeats, List<NodeFactory<? extends SLBuiltinNode>> currentBuiltins) throws IOException {
         builtins = currentBuiltins;
 
         if (logOutput != null) {
--- a/truffle/com.oracle.truffle.tck/src/com/oracle/truffle/tck/TruffleTCK.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.tck/src/com/oracle/truffle/tck/TruffleTCK.java	Mon Sep 21 10:34:30 2015 +0200
@@ -27,7 +27,7 @@
 import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.interop.java.JavaInterop;
 import com.oracle.truffle.api.source.Source;
-import com.oracle.truffle.api.vm.Portaal;
+import com.oracle.truffle.api.vm.PolyglotEngine;
 import java.io.IOException;
 import java.util.Random;
 import java.util.logging.Level;
@@ -43,7 +43,7 @@
 public abstract class TruffleTCK {
     private static final Logger LOG = Logger.getLogger(TruffleTCK.class.getName());
     private static final Random RANDOM = new Random();
-    private Portaal tckVM;
+    private PolyglotEngine tckVM;
 
     protected TruffleTCK() {
     }
@@ -51,7 +51,7 @@
     /**
      * This methods is called before first test is executed. It's purpose is to set a TruffleVM with
      * your language up, so it is ready for testing.
-     * {@link Portaal#eval(com.oracle.truffle.api.source.Source) Execute} any scripts you need, and
+     * {@link PolyglotEngine#eval(com.oracle.truffle.api.source.Source) Execute} any scripts you need, and
      * prepare global symbols with proper names. The symbols will then be looked up by the
      * infrastructure (using the names provided by you from methods like {@link #plusInt()}) and
      * used for internal testing.
@@ -59,11 +59,11 @@
      * @return initialized Truffle virtual machine
      * @throws java.lang.Exception thrown when the VM preparation fails
      */
-    protected abstract Portaal prepareVM() throws Exception;
+    protected abstract PolyglotEngine prepareVM() throws Exception;
 
     /**
      * MIME type associated with your language. The MIME type will be passed to
-     * {@link Portaal#eval(com.oracle.truffle.api.source.Source)} method of the {@link #prepareVM()
+     * {@link PolyglotEngine#eval(com.oracle.truffle.api.source.Source)} method of the {@link #prepareVM()
      * created TruffleVM}.
      *
      * @return mime type of the tested language
@@ -82,7 +82,7 @@
     /**
      * Name of a function that returns <code>null</code>. Truffle languages are encouraged to have
      * their own type representing <code>null</code>, but when such value is returned from
-     * {@link Portaal#eval}, it needs to be converted to real Java <code>null</code> by sending a
+     * {@link PolyglotEngine#eval}, it needs to be converted to real Java <code>null</code> by sending a
      * foreign access <em>isNull</em> message. There is a test to verify it is really true.
      *
      * @return name of globally exported symbol
@@ -149,7 +149,7 @@
     }
 
     /**
-     * Name of a function that counts number of its invocations in current {@link Portaal} context.
+     * Name of a function that counts number of its invocations in current {@link PolyglotEngine} context.
      * Your function should somehow keep a counter to remember number of its invocations and always
      * increment it. The first invocation should return <code>1</code>, the second <code>2</code>
      * and so on. The returned values are expected to be instances of {@link Number}.
@@ -163,7 +163,7 @@
 
     /**
      * Return a code snippet that is invalid in your language. Its
-     * {@link Portaal#eval(com.oracle.truffle.api.source.Source) evaluation} should fail and yield
+     * {@link PolyglotEngine#eval(com.oracle.truffle.api.source.Source) evaluation} should fail and yield
      * an exception.
      *
      * @return code snippet invalid in the tested language
@@ -195,7 +195,7 @@
         return null;
     }
 
-    private Portaal vm() throws Exception {
+    private PolyglotEngine vm() throws Exception {
         if (tckVM == null) {
             tckVM = prepareVM();
         }
@@ -208,7 +208,7 @@
 
     @Test
     public void testFortyTwo() throws Exception {
-        Portaal.Value fourtyTwo = findGlobalSymbol(fourtyTwo());
+        PolyglotEngine.Value fourtyTwo = findGlobalSymbol(fourtyTwo());
 
         Object res = fourtyTwo.invoke(null).get();
 
@@ -231,7 +231,7 @@
 
     @Test
     public void testNull() throws Exception {
-        Portaal.Value retNull = findGlobalSymbol(returnsNull());
+        PolyglotEngine.Value retNull = findGlobalSymbol(returnsNull());
 
         Object res = retNull.invoke(null).get();
 
@@ -253,7 +253,7 @@
         int a = RANDOM.nextInt(100);
         int b = RANDOM.nextInt(100);
 
-        Portaal.Value plus = findGlobalSymbol(plus(int.class, int.class));
+        PolyglotEngine.Value plus = findGlobalSymbol(plus(int.class, int.class));
 
         Number n = plus.invoke(null, a, b).as(Number.class);
         assert a + b == n.intValue() : "The value is correct: (" + a + " + " + b + ") =  " + n.intValue();
@@ -264,7 +264,7 @@
         int a = RANDOM.nextInt(100);
         int b = RANDOM.nextInt(100);
 
-        Portaal.Value plus = findGlobalSymbol(plus(byte.class, byte.class));
+        PolyglotEngine.Value plus = findGlobalSymbol(plus(byte.class, byte.class));
 
         Number n = plus.invoke(null, (byte) a, (byte) b).as(Number.class);
         assert a + b == n.intValue() : "The value is correct: (" + a + " + " + b + ") =  " + n.intValue();
@@ -275,7 +275,7 @@
         int a = RANDOM.nextInt(100);
         int b = RANDOM.nextInt(100);
 
-        Portaal.Value plus = findGlobalSymbol(plus(short.class, short.class));
+        PolyglotEngine.Value plus = findGlobalSymbol(plus(short.class, short.class));
 
         Number n = plus.invoke(null, (short) a, (short) b).as(Number.class);
         assert a + b == n.intValue() : "The value is correct: (" + a + " + " + b + ") =  " + n.intValue();
@@ -286,7 +286,7 @@
         long a = RANDOM.nextInt(100);
         long b = RANDOM.nextInt(100);
 
-        Portaal.Value plus = findGlobalSymbol(plus(long.class, long.class));
+        PolyglotEngine.Value plus = findGlobalSymbol(plus(long.class, long.class));
 
         Number n = plus.invoke(null, a, b).as(Number.class);
         assert a + b == n.longValue() : "The value is correct: (" + a + " + " + b + ") =  " + n.longValue();
@@ -297,7 +297,7 @@
         float a = RANDOM.nextFloat();
         float b = RANDOM.nextFloat();
 
-        Portaal.Value plus = findGlobalSymbol(plus(float.class, float.class));
+        PolyglotEngine.Value plus = findGlobalSymbol(plus(float.class, float.class));
 
         Number n = plus.invoke(null, a, b).as(Number.class);
         assertEquals("Correct value computed", a + b, n.floatValue(), 0.01f);
@@ -308,7 +308,7 @@
         double a = RANDOM.nextDouble();
         double b = RANDOM.nextDouble();
 
-        Portaal.Value plus = findGlobalSymbol(plus(float.class, float.class));
+        PolyglotEngine.Value plus = findGlobalSymbol(plus(float.class, float.class));
 
         Number n = plus.invoke(null, a, b).as(Number.class);
         assertEquals("Correct value computed", a + b, n.doubleValue(), 0.01);
@@ -338,7 +338,7 @@
 
     @Test
     public void testMaxOrMinValue() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         TruffleObject fn = JavaInterop.asTruffleFunction(LongBinaryOperation.class, new MaxMinObject(true));
         Object res = apply.invoke(null, fn).get();
@@ -352,10 +352,10 @@
 
     @Test
     public void testMaxOrMinValue2() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         TruffleObject fn = JavaInterop.asTruffleFunction(LongBinaryOperation.class, new MaxMinObject(false));
-        final Portaal.Value result = apply.invoke(null, fn);
+        final PolyglotEngine.Value result = apply.invoke(null, fn);
 
         try {
             String res = result.as(String.class);
@@ -370,7 +370,7 @@
 
     @Test
     public void testPrimitiveReturnTypeByte() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         byte value = (byte) RANDOM.nextInt(100);
 
@@ -381,7 +381,7 @@
 
     @Test
     public void testPrimitiveReturnTypeShort() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         short value = (short) RANDOM.nextInt(100);
 
@@ -392,7 +392,7 @@
 
     @Test
     public void testPrimitiveReturnTypeInt() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         int value = RANDOM.nextInt(100);
 
@@ -403,7 +403,7 @@
 
     @Test
     public void testPrimitiveReturnTypeLong() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         long value = RANDOM.nextInt(1000);
 
@@ -414,7 +414,7 @@
 
     @Test
     public void testPrimitiveReturnTypeFloat() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         float value = RANDOM.nextInt(1000) + RANDOM.nextFloat();
 
@@ -425,7 +425,7 @@
 
     @Test
     public void testPrimitiveReturnTypeDouble() throws Exception {
-        Portaal.Value apply = findGlobalSymbol(applyNumbers());
+        PolyglotEngine.Value apply = findGlobalSymbol(applyNumbers());
 
         double value = RANDOM.nextInt(1000) + RANDOM.nextDouble();
 
@@ -440,7 +440,7 @@
         if (id == null) {
             return;
         }
-        Portaal.Value apply = findGlobalSymbol(id);
+        PolyglotEngine.Value apply = findGlobalSymbol(id);
 
         byte value = (byte) RANDOM.nextInt(100);
 
@@ -454,7 +454,7 @@
         if (id == null) {
             return;
         }
-        Portaal.Value apply = findGlobalSymbol(id);
+        PolyglotEngine.Value apply = findGlobalSymbol(id);
 
         short value = (short) RANDOM.nextInt(100);
         Number n = (Number) apply.invoke(null, value).get();
@@ -467,7 +467,7 @@
         if (id == null) {
             return;
         }
-        Portaal.Value apply = findGlobalSymbol(id);
+        PolyglotEngine.Value apply = findGlobalSymbol(id);
 
         int value = RANDOM.nextInt(100);
 
@@ -481,7 +481,7 @@
         if (id == null) {
             return;
         }
-        Portaal.Value apply = findGlobalSymbol(id);
+        PolyglotEngine.Value apply = findGlobalSymbol(id);
 
         long value = RANDOM.nextInt(1000);
 
@@ -495,7 +495,7 @@
         if (id == null) {
             return;
         }
-        Portaal.Value apply = findGlobalSymbol(id);
+        PolyglotEngine.Value apply = findGlobalSymbol(id);
 
         float value = RANDOM.nextInt(1000) + RANDOM.nextFloat();
 
@@ -509,7 +509,7 @@
         if (id == null) {
             return;
         }
-        Portaal.Value apply = findGlobalSymbol(id);
+        PolyglotEngine.Value apply = findGlobalSymbol(id);
 
         double value = RANDOM.nextInt(1000) + RANDOM.nextDouble();
 
@@ -523,7 +523,7 @@
         if (id == null) {
             return;
         }
-        Portaal.Value apply = findGlobalSymbol(id);
+        PolyglotEngine.Value apply = findGlobalSymbol(id);
 
         TruffleObject fn = JavaInterop.asTruffleFunction(LongBinaryOperation.class, new MaxMinObject(true));
 
@@ -534,11 +534,11 @@
     @Test
     public void testCoExistanceOfMultipleLanguageInstances() throws Exception {
         final String countMethod = countInvocations();
-        Portaal.Value count1 = findGlobalSymbol(countMethod);
-        Portaal vm1 = tckVM;
+        PolyglotEngine.Value count1 = findGlobalSymbol(countMethod);
+        PolyglotEngine vm1 = tckVM;
         tckVM = null; // clean-up
-        Portaal.Value count2 = findGlobalSymbol(countMethod);
-        Portaal vm2 = tckVM;
+        PolyglotEngine.Value count2 = findGlobalSymbol(countMethod);
+        PolyglotEngine vm2 = tckVM;
 
         assertNotSame("Two virtual machines allocated", vm1, vm2);
 
@@ -563,8 +563,8 @@
 
     }
 
-    private Portaal.Value findGlobalSymbol(String name) throws Exception {
-        Portaal.Value s = vm().findGlobalSymbol(name);
+    private PolyglotEngine.Value findGlobalSymbol(String name) throws Exception {
+        PolyglotEngine.Value s = vm().findGlobalSymbol(name);
         assert s != null : "Symbol " + name + " is not found!";
         return s;
     }
@@ -581,7 +581,7 @@
             Thread.sleep(wait);
             return null;
         }
-        Portaal.Value s = vm().findGlobalSymbol(compoundObjectName);
+        PolyglotEngine.Value s = vm().findGlobalSymbol(compoundObjectName);
         assert s != null : "Symbol " + compoundObjectName + " is not found!";
         CompoundObject obj = s.invoke(null).as(CompoundObject.class);
         int traverse = RANDOM.nextInt(10);
--- a/truffle/com.oracle.truffle.tools.debug.shell/src/com/oracle/truffle/tools/debug/shell/server/REPLServerContext.java	Mon Sep 14 09:18:36 2015 +0200
+++ b/truffle/com.oracle.truffle.tools.debug.shell/src/com/oracle/truffle/tools/debug/shell/server/REPLServerContext.java	Mon Sep 21 10:34:30 2015 +0200
@@ -32,7 +32,7 @@
 import com.oracle.truffle.api.instrument.impl.DefaultVisualizer;
 import com.oracle.truffle.api.nodes.*;
 import com.oracle.truffle.api.vm.*;
-import com.oracle.truffle.api.vm.Portaal.Language;
+import com.oracle.truffle.api.vm.PolyglotEngine.Language;
 import com.oracle.truffle.tools.debug.shell.*;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -75,7 +75,7 @@
         return new DefaultVisualizer();
     }
 
-    public abstract Portaal vm();
+    public abstract PolyglotEngine vm();
 
     protected abstract Debugger db();