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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLStatementNode.java @ 16914:826c172a048f

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SL: fixed merge problem.
author Christian Humer <christian.humer@gmail.com>
date Sat, 23 Aug 2014 19:31:36 +0200
parents b879421229db
children 997899955e72 a1427e40deaf
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1 /*
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2 * Copyright (c) 2012, 2014, 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.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.sl.nodes;
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24
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25 import java.io.*;
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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.instrument.*;
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30 import com.oracle.truffle.api.nodes.*;
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31 import com.oracle.truffle.api.source.*;
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32 import com.oracle.truffle.sl.nodes.instrument.*;
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33 import com.oracle.truffle.sl.runtime.*;
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34
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35 /**
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36 * The base class of all Truffle nodes for SL. All nodes (even expressions) can be used as
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37 * statements, i.e., without returning a value. The {@link VirtualFrame} provides access to the
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38 * local variables.
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39 */
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40 @NodeInfo(language = "Simple Language", description = "The abstract base node for all statements")
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41 public abstract class SLStatementNode extends Node implements Instrumentable {
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42
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43 public SLStatementNode(SourceSection src) {
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44 super(src);
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45 }
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46
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47 /**
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48 * Execute this node as as statement, where no return value is necessary.
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49 */
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50 public abstract void executeVoid(VirtualFrame frame);
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51
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52 public SLStatementNode getNonWrapperNode() {
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53 return this;
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54 }
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55
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56 @Override
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57 public String toString() {
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58 return formatSourceSection(this);
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59 }
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60
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61 /**
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62 * Formats a source section of a node in human readable form. If no source section could be
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63 * found it looks up the parent hierarchy until it finds a source section. Nodes where this was
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64 * required append a <code>'~'</code> at the end.
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65 *
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66 * @param node the node to format.
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67 * @return a formatted source section string
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68 */
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69 private static String formatSourceSection(Node node) {
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70 if (node == null) {
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71 return "<unknown>";
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72 }
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73 SourceSection section = node.getSourceSection();
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74 boolean estimated = false;
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75 if (section == null) {
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76 section = node.getEncapsulatingSourceSection();
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77 estimated = true;
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78 }
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79
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80 if (section == null || section.getSource() == null) {
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81 return "<unknown source>";
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82 } else {
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83 String sourceName = new File(section.getSource().getName()).getName();
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84 int startLine = section.getStartLine();
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85 return String.format("%s:%d%s", sourceName, startLine, estimated ? "~" : "");
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86 }
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87 }
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88
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89 @Override
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90 public Probe probe(ExecutionContext context) {
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91 Node parent = getParent();
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92
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93 if (parent == null)
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94 throw new IllegalStateException("Cannot probe a node without a parent");
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96 if (parent instanceof SLStatementWrapper)
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97 return ((SLStatementWrapper) parent).getProbe();
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98
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99 SLStatementWrapper wrapper = new SLStatementWrapper((SLContext) context, this);
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100 this.replace(wrapper);
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101 wrapper.insertChild();
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102 return wrapper.getProbe();
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103 }
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104 }