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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultCallTarget.java @ 15564:a3b0ecef8a15

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Truffle: Provide default implementation on non-Graal VMs for stack trace functionality.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 08 May 2014 22:53:28 +0200
parents 258e3e0b5e2e
children 0a35e2789735
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.impl;
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26
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.frame.*;
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29 import com.oracle.truffle.api.nodes.*;
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30
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31 /**
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32 * This is an implementation-specific class. Do not use or instantiate it. Instead, use
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33 * {@link TruffleRuntime#createCallTarget(RootNode)} to create a {@link RootCallTarget}.
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34 */
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35 public class DefaultCallTarget implements RootCallTarget {
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36
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37 private final RootNode rootNode;
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38 private final DefaultTruffleRuntime defaultTruffleRuntime;
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39
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40 public DefaultCallTarget(RootNode function, DefaultTruffleRuntime defaultTruffleRuntime) {
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41 this.rootNode = function;
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42 this.rootNode.adoptChildren();
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43 this.rootNode.setCallTarget(this);
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44 this.defaultTruffleRuntime = defaultTruffleRuntime;
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45 }
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46
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47 @Override
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48 public String toString() {
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49 return rootNode.toString();
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50 }
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51
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52 public final RootNode getRootNode() {
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53 return rootNode;
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54 }
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56 @Override
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57 public Object call(Object... args) {
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58 final VirtualFrame frame = new DefaultVirtualFrame(getRootNode().getFrameDescriptor(), args);
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59 FrameInstance oldCurrentFrame = defaultTruffleRuntime.setCurrentFrame(new FrameInstance() {
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60
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61 public Frame getFrame(FrameAccess access, boolean slowPath) {
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62 return frame;
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63 }
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64
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65 public boolean isVirtualFrame() {
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66 return false;
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67 }
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69 public Node getCallNode() {
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70 return null;
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71 }
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73 public CallTarget getCallTarget() {
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74 return DefaultCallTarget.this;
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75 }
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76 });
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77 try {
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78 return getRootNode().execute(frame);
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79 } finally {
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80 defaultTruffleRuntime.setCurrentFrame(oldCurrentFrame);
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81 }
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82 }
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83 }