--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/CompilerThread.java	Fri Oct 25 23:50:05 2013 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/CompilerThread.java	Sat Oct 26 01:27:09 2013 +0200
@@ -50,16 +50,16 @@
 
     @Override
     public void run() {
-        GraalDebugConfig hotspotDebugConfig = null;
+        GraalDebugConfig debugConfig = null;
         if (Debug.isEnabled()) {
             PrintStream log = runtime().getVMToCompiler().log();
-            DebugEnvironment.initialize(log);
+            debugConfig = DebugEnvironment.initialize(log);
         }
         try {
             super.run();
         } finally {
-            if (hotspotDebugConfig != null) {
-                for (DebugDumpHandler dumpHandler : hotspotDebugConfig.dumpHandlers()) {
+            if (debugConfig != null) {
+                for (DebugDumpHandler dumpHandler : debugConfig.dumpHandlers()) {
                     try {
                         dumpHandler.close();
                     } catch (Throwable t) {

--- a/graal/com.oracle.graal.printer/src/com/oracle/graal/printer/DebugEnvironment.java	Fri Oct 25 23:50:05 2013 +0200
+++ b/graal/com.oracle.graal.printer/src/com/oracle/graal/printer/DebugEnvironment.java	Sat Oct 26 01:27:09 2013 +0200
@@ -33,10 +33,10 @@
 
 public class DebugEnvironment {
 
-    public static void initialize(PrintStream log) {
+    public static GraalDebugConfig initialize(PrintStream log) {
         if (!Debug.isEnabled()) {
             log.println("WARNING: Scope debugging needs to be enabled with -esa or -D" + Debug.Initialization.INITIALIZER_PROPERTY_NAME + "=true");
-            return;
+            return null;
         }
         List<DebugDumpHandler> dumpHandlers = new ArrayList<>();
         dumpHandlers.add(new GraphPrinterDumpHandler());
@@ -49,7 +49,8 @@
         if (DecompileAfterPhase.getValue() != null) {
             dumpHandlers.add(new DecompilerDebugDumpHandler());
         }
-        GraalDebugConfig hotspotDebugConfig = new GraalDebugConfig(Log.getValue(), Meter.getValue(), Time.getValue(), Dump.getValue(), MethodFilter.getValue(), log, dumpHandlers);
-        Debug.setConfig(hotspotDebugConfig);
+        GraalDebugConfig debugConfig = new GraalDebugConfig(Log.getValue(), Meter.getValue(), Time.getValue(), Dump.getValue(), MethodFilter.getValue(), log, dumpHandlers);
+        Debug.setConfig(debugConfig);
+        return debugConfig;
     }
 }

--- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/TruffleCompilerImpl.java	Fri Oct 25 23:50:05 2013 +0200
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/TruffleCompilerImpl.java	Sat Oct 26 01:27:09 2013 +0200
@@ -81,7 +81,7 @@
         this.skippedExceptionTypes = getSkippedExceptionTypes(providers.getMetaAccess());
 
         // Create compilation queue.
-        compileQueue = new ThreadPoolExecutor(1, 1, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>());
+        compileQueue = new ThreadPoolExecutor(1, 1, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(), TruffleCompilerThread.FACTORY);
 
         final GraphBuilderConfiguration config = GraphBuilderConfiguration.getEagerDefault();
         config.setSkippedExceptionTypes(skippedExceptionTypes);
@@ -107,7 +107,7 @@
 
             @Override
             public InstalledCode call() throws Exception {
-                Object[] debug = new Object[]{new DebugDumpScope("Truffle: " + compilable)};
+                Object[] debug = new Object[]{new TruffleDebugJavaMethod(compilable)};
                 return Debug.scope("Truffle", debug, new Callable<InstalledCode>() {
 
                     @Override

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/TruffleCompilerThread.java	Sat Oct 26 01:27:09 2013 +0200
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.graal.truffle;
+
+import java.util.concurrent.*;
+
+import com.oracle.graal.compiler.*;
+import com.oracle.graal.debug.*;
+import com.oracle.graal.printer.*;
+
+public final class TruffleCompilerThread extends Thread {
+
+    public static final ThreadFactory FACTORY = new ThreadFactory() {
+
+        @Override
+        public Thread newThread(Runnable r) {
+            return new TruffleCompilerThread(r);
+        }
+    };
+
+    private TruffleCompilerThread(Runnable r) {
+        super(r);
+        this.setName("TruffleCompilerThread-" + this.getId());
+        this.setPriority(MAX_PRIORITY);
+        this.setDaemon(true);
+    }
+
+    @Override
+    public void run() {
+        GraalDebugConfig debugConfig = null;
+        if (Debug.isEnabled()) {
+            debugConfig = DebugEnvironment.initialize(System.out);
+        }
+        try {
+            super.run();
+        } finally {
+            if (debugConfig != null) {
+                for (DebugDumpHandler dumpHandler : debugConfig.dumpHandlers()) {
+                    try {
+                        dumpHandler.close();
+                    } catch (Throwable t) {
+
+                    }
+                }
+            }
+        }
+    }
+}