--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/logging/Logger.java	Tue May 26 17:13:37 2015 +0200
@@ -0,0 +1,199 @@
+/*
+ * Copyright (c) 2011, 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.jvmci.hotspot.logging;
+
+import java.io.*;
+import java.lang.reflect.*;
+import java.util.*;
+
+import com.oracle.graal.debug.*;
+import com.oracle.jvmci.hotspot.*;
+
+/**
+ * Scoped logging class used to display the call hierarchy of {@link CompilerToVM} calls.
+ */
+public class Logger {
+
+    public static final boolean ENABLED = Boolean.valueOf(System.getProperty("graal.debug"));
+    private static final int SPACING = 4;
+    private static final ThreadLocal<Logger> loggerTL;
+
+    private Deque<Boolean> openStack = new LinkedList<>();
+    private boolean open = false;
+    private int level = 0;
+
+    private static final PrintStream out;
+
+    static {
+        if (ENABLED) {
+            loggerTL = new ThreadLocal<Logger>() {
+
+                @Override
+                protected Logger initialValue() {
+                    return new Logger();
+                }
+            };
+        } else {
+            loggerTL = null;
+        }
+
+        PrintStream ps = null;
+        String filename = System.getProperty("graal.info_file");
+        if (filename != null && !"".equals(filename)) {
+            try {
+                ps = new PrintStream(new FileOutputStream(filename));
+            } catch (FileNotFoundException e) {
+                e.printStackTrace();
+                ps = null;
+            }
+        }
+        out = ps;
+        if (out != null) {
+            out.println("start: " + new Date());
+        }
+    }
+
+    public static void info(String message) {
+        if (ENABLED) {
+            log(message);
+        } else {
+            TTY.println(message);
+        }
+        if (out != null) {
+            out.println(message);
+            out.flush();
+        }
+    }
+
+    public static void log(String message) {
+        if (ENABLED) {
+            Logger logger = loggerTL.get();
+            for (String line : message.split("\n")) {
+                if (logger.open) {
+                    TTY.println("...");
+                    logger.open = false;
+                }
+                TTY.print(space(logger.level));
+                TTY.println(line);
+            }
+        }
+    }
+
+    public static void startScope(String message) {
+        if (ENABLED) {
+            Logger logger = loggerTL.get();
+            if (logger.open) {
+                TTY.println("...");
+                logger.open = false;
+            }
+            TTY.print(space(logger.level));
+            TTY.print(message);
+            logger.openStack.push(logger.open);
+            logger.open = true;
+            logger.level++;
+        }
+    }
+
+    public static void endScope(String message) {
+        if (ENABLED) {
+            Logger logger = loggerTL.get();
+            logger.level--;
+            if (logger.open) {
+                TTY.println(message);
+            } else {
+                TTY.println(space(logger.level) + "..." + message);
+            }
+            logger.open = logger.openStack.pop();
+        }
+    }
+
+    private static String[] spaces = new String[50];
+
+    private static String space(int count) {
+        assert count >= 0;
+        String result;
+        if (count >= spaces.length || spaces[count] == null) {
+            StringBuilder str = new StringBuilder();
+            for (int i = 0; i < count * SPACING; i++) {
+                str.append(' ');
+            }
+            result = str.toString();
+            if (count < spaces.length) {
+                spaces[count] = result;
+            }
+        } else {
+            result = spaces[count];
+        }
+        return result;
+    }
+
+    public static String pretty(Object value) {
+        if (value == null) {
+            return "null";
+        }
+
+        Class<?> klass = value.getClass();
+        if (value instanceof Void) {
+            return "void";
+        } else if (value instanceof String) {
+            return "\"" + value + "\"";
+        } else if (value instanceof Method) {
+            return "method \"" + ((Method) value).getName() + "\"";
+        } else if (value instanceof Class<?>) {
+            return "class \"" + ((Class<?>) value).getSimpleName() + "\"";
+        } else if (value instanceof Integer) {
+            if ((Integer) value < 10) {
+                return value.toString();
+            }
+            return value + " (0x" + Integer.toHexString((Integer) value) + ")";
+        } else if (value instanceof Long) {
+            if ((Long) value < 10 && (Long) value > -10) {
+                return value + "l";
+            }
+            return value + "l (0x" + Long.toHexString((Long) value) + "l)";
+        } else if (klass.isArray()) {
+            StringBuilder str = new StringBuilder();
+            int dimensions = 0;
+            while (klass.isArray()) {
+                dimensions++;
+                klass = klass.getComponentType();
+            }
+            int length = Array.getLength(value);
+            str.append(klass.getSimpleName()).append('[').append(length).append(']');
+            for (int i = 1; i < dimensions; i++) {
+                str.append("[]");
+            }
+            str.append(" {");
+            for (int i = 0; i < length; i++) {
+                str.append(pretty(Array.get(value, i)));
+                if (i < length - 1) {
+                    str.append(", ");
+                }
+            }
+            str.append('}');
+            return str.toString();
+        }
+
+        return value.toString();
+    }
+}