--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/GraalCompiler/src/com/sun/c1x/debug/IdealGraphPrinterObserver.java	Wed May 18 18:40:58 2011 +0200
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2011, 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.sun.c1x.debug;
+
+import java.io.*;
+import java.net.*;
+import java.util.regex.*;
+
+import com.oracle.graal.graph.*;
+import com.sun.c1x.*;
+import com.sun.c1x.observer.*;
+import com.sun.c1x.value.*;
+
+/**
+ * Observes compilation events and uses {@link IdealGraphPrinter} to generate a graph representation that can be
+ * inspected with the <a href="http://kenai.com/projects/igv">Ideal Graph Visualizer</a>.
+ *
+ * @author Peter Hofer
+ */
+public class IdealGraphPrinterObserver implements CompilationObserver {
+
+    private static final Pattern INVALID_CHAR = Pattern.compile("[^A-Za-z0-9_.-]");
+
+    private final String host;
+    private final int port;
+
+    private IdealGraphPrinter printer;
+    private OutputStream stream;
+    private Socket socket;
+
+    /**
+     * Creates a new {@link IdealGraphPrinterObserver} that writes output to a file named after the compiled method.
+     */
+    public IdealGraphPrinterObserver() {
+        this(null, -1);
+    }
+
+    /**
+     * Creates a new {@link IdealGraphPrinterObserver} that sends output to a remove IdealGraphVisualizer instance.
+     */
+    public IdealGraphPrinterObserver(String host, int port) {
+        this.host = host;
+        this.port = port;
+    }
+
+    @Override
+    public void compilationStarted(CompilationEvent event) {
+        assert (stream == null && printer == null);
+
+        if (!TTY.isSuppressed()) {
+            String name = event.getMethod().holder().name();
+            name = name.substring(1, name.length() - 1).replace('/', '.');
+            name = name + "." + event.getMethod().name();
+
+            if (host != null) {
+                openNetworkPrinter(name);
+            } else {
+                openFilePrinter(name);
+            }
+        }
+    }
+
+    private void openFilePrinter(String name) {
+        String filename = name + ".igv.xml";
+        filename = INVALID_CHAR.matcher(filename).replaceAll("_");
+
+        try {
+            stream = new FileOutputStream(filename);
+            printer = new IdealGraphPrinter(stream);
+            if (C1XOptions.OmitDOTFrameStates) {
+                printer.addOmittedClass(FrameState.class);
+            }
+            printer.begin();
+            printer.beginGroup(name, name, -1);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void openNetworkPrinter(String name) {
+        try {
+            socket = new Socket(host, port);
+            if (socket.getInputStream().read() == 'y') {
+                stream = socket.getOutputStream();
+            } else {
+                // server currently does not accept any input
+                socket.close();
+                socket = null;
+                return;
+            }
+
+            printer = new IdealGraphPrinter(stream);
+            if (C1XOptions.OmitDOTFrameStates) {
+                printer.addOmittedClass(FrameState.class);
+            }
+            printer.begin();
+            printer.beginGroup(name, name, -1);
+            printer.flush();
+            if (socket.getInputStream().read() != 'y') {
+                // server declines input for this method
+                socket.close();
+                socket = null;
+                stream = null;
+                printer = null;
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+
+            if (socket != null) {
+                try {
+                    socket.close();
+                } catch (IOException ioe) {
+                }
+                socket = null;
+            }
+            stream = null;
+            printer = null;
+        }
+    }
+
+    @Override
+    public void compilationEvent(CompilationEvent event) {
+        if (printer != null && event.getStartBlock() != null) {
+            Graph graph = event.getStartBlock().graph();
+            printer.print(graph, event.getLabel(), true);
+        }
+    }
+
+    @Override
+    public void compilationFinished(CompilationEvent event) {
+        if (printer != null) {
+            try {
+                printer.endGroup();
+                printer.end();
+
+                if (socket != null) {
+                    socket.close(); // also closes stream
+                } else {
+                    stream.close();
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            } finally {
+                printer = null;
+                stream = null;
+                socket = null;
+            }
+        }
+    }
+
+}