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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/SLStatementNode.java @ 16961:a1427e40deaf
Truffle/Instrumentation: some Javadoc revistions; minor code cleanups; remove one redundant operation; add tracing to the LineLocation maps.
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Tue, 26 Aug 2014 13:54:53 -0700 |
parents | 826c172a048f |
children | f0c3de09f12a |
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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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95 |
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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 |
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100 // Create a new wrapper/probe with this node as its child. |
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101 SLStatementWrapper wrapper = new SLStatementWrapper((SLContext) context, this); |
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102 |
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103 // Replace this node in the AST with the wrapper |
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104 this.replace(wrapper); |
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105 |
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106 return wrapper.getProbe(); |
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107 } |
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108 } |