Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot.server/src/com/oracle/graal/hotspot/server/ReplacingStreams.java @ 9960:b1b69cb27756
Merge (1b33ef6544b4 Fixed a warning)
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 10 Jun 2013 10:52:40 +0200 |
parents | 5e3d1a68664e |
children | db4254246f9a |
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/* * 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.oracle.graal.hotspot.server; import java.io.*; import java.lang.reflect.*; import java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.hotspot.logging.*; public class ReplacingStreams { private IdentityHashMap<Object, Placeholder> objectMap = new IdentityHashMap<>(); private ArrayList<Object> objectList = new ArrayList<>(); private ReplacingOutputStream output; private ReplacingInputStream input; private InvocationSocket invocation; public ReplacingStreams(OutputStream outputStream, InputStream inputStream) throws IOException { output = new ReplacingOutputStream(new BufferedOutputStream(outputStream)); // required, because creating an ObjectOutputStream writes a header, but doesn't flush the // stream output.flush(); input = new ReplacingInputStream(new BufferedInputStream(inputStream)); invocation = new InvocationSocket(output, input); addStaticObject(Value.ILLEGAL); } public void setInvocationSocket(InvocationSocket invocation) { this.invocation = invocation; } public ReplacingOutputStream getOutput() { return output; } public ReplacingInputStream getInput() { return input; } public InvocationSocket getInvocation() { return invocation; } private void addStaticObject(Object obj) { int id = objectList.size(); objectList.add(obj); objectMap.put(obj, new Placeholder(id)); } public static class Placeholder implements Serializable { private static final long serialVersionUID = 6071894297788156945L; public final int id; public Placeholder(int id) { this.id = id; } @Override public String toString() { return "#<" + id + ">"; } } public static class NewRemoteCallPlaceholder implements Serializable { private static final long serialVersionUID = 3084101671389500206L; public final Class<?>[] interfaces; public NewRemoteCallPlaceholder(Class<?>[] interfaces) { this.interfaces = interfaces; } } public static class NewDummyPlaceholder implements Serializable { private static final long serialVersionUID = 2692666726573532288L; } /** * Replaces certain cir objects that cannot easily be made Serializable. */ public class ReplacingInputStream extends ObjectInputStream { public ReplacingInputStream(InputStream in) throws IOException { super(in); enableResolveObject(true); } @Override protected Object resolveObject(Object obj) throws IOException { // see ReplacingInputStream.replaceObject for details on when these types of objects are // created if (obj instanceof Placeholder) { Placeholder placeholder = (Placeholder) obj; Object resolvedObj = objectList.get(placeholder.id); return resolvedObj; } if (obj instanceof NewRemoteCallPlaceholder) { NewRemoteCallPlaceholder newPlaceholder = (NewRemoteCallPlaceholder) obj; Placeholder placeholder = new Placeholder(objectList.size()); Object resolvedObj = Proxy.newProxyInstance(getClass().getClassLoader(), newPlaceholder.interfaces, invocation.new Handler(placeholder)); objectMap.put(resolvedObj, placeholder); objectList.add(resolvedObj); return resolvedObj; } if (obj instanceof NewDummyPlaceholder) { Object resolvedObj = new Placeholder(objectList.size()); objectMap.put(resolvedObj, (Placeholder) resolvedObj); objectList.add(resolvedObj); return resolvedObj; } return obj; } } /** * Replaces certain cir objects that cannot easily be made Serializable. */ public class ReplacingOutputStream extends ObjectOutputStream { public ReplacingOutputStream(OutputStream out) throws IOException { super(out); enableReplaceObject(true); } @Override protected Object replaceObject(Object obj) throws IOException { // is the object a known instance? Placeholder placeholder = objectMap.get(obj); if (placeholder != null) { return placeholder; } // is the object an instance of a class that will always be executed remotely? if (obj instanceof Remote) { return createRemoteCallPlaceholder(obj); } // is the object a constant of object type? if (obj.getClass() == Constant.class) { Constant constant = (Constant) obj; if (constant.getKind() != Kind.Object) { return obj; } Object contents = constant.asObject(); if (contents == null) { return obj; } // don't replace if the object already is a placeholder if (contents instanceof Placeholder || contents instanceof Long) { return obj; } placeholder = objectMap.get(contents); if (placeholder != null) { return Constant.forObject(placeholder); } if (contents instanceof Remote) { return Constant.forObject(createRemoteCallPlaceholder(contents)); } return Constant.forObject(createDummyPlaceholder(contents)); } return obj; } } private Object createRemoteCallPlaceholder(Object obj) { // collect all interfaces that this object's class implements (proxies only support // interfaces) objectMap.put(obj, new Placeholder(objectList.size())); objectList.add(obj); return new NewRemoteCallPlaceholder(ProxyUtil.getAllInterfaces(obj.getClass())); } public Object createDummyPlaceholder(Object obj) { objectMap.put(obj, new Placeholder(objectList.size())); objectList.add(obj); return new NewDummyPlaceholder(); } }