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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/instrument/SLStatementWrapper.java @ 16913:b879421229db

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SL: better toString for SL nodes.
author Christian Humer <christian.humer@gmail.com>
date Sat, 23 Aug 2014 19:31:33 +0200
parents 7661cc464239
children a1427e40deaf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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.instrument;
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24
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25 import com.oracle.truffle.api.CompilerDirectives.SlowPath;
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26 import com.oracle.truffle.api.frame.*;
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27 import com.oracle.truffle.api.instrument.*;
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28 import com.oracle.truffle.api.nodes.*;
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29 import com.oracle.truffle.sl.nodes.*;
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30 import com.oracle.truffle.sl.runtime.*;
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31
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32 /**
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33 * SLStatmentWrapper is a Truffle AST node that gets inserted as the parent to the node that it is
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34 * wrapping. Any debugging instruments are attached to this wrapper through {@link Probe}s (which
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35 * themselves contain the instruments). It is through this mechanism that tools can interact
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36 * directly with the AST. <br/>
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37 * SLStatmentWrapper specifically wraps {@link SLStatementWrapper}s and overrides the executeVoid
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38 * function of {@link SLStatementNode} to operate on the child of the wrapper instead of the wrapper
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39 * itself.
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40 *
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41 */
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42 public final class SLStatementWrapper extends SLStatementNode implements Wrapper {
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43
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44 @Child private SLStatementNode child;
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45
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46 private final Probe probe;
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47
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48 public SLStatementWrapper(SLContext context, SLStatementNode child) {
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49 super(child.getSourceSection());
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50 assert !(child instanceof SLStatementWrapper);
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51 this.probe = context.createProbe(child.getSourceSection());
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52 this.child = child;
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53 // The child should only be inserted after a replace, so we defer inserting the child to the
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54 // creator of the wrapper.
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55 }
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56
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57 @Override
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58 public SLStatementNode getNonWrapperNode() {
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59 return child;
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60 }
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61
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62 public Node getChild() {
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63 return child;
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64 }
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65
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66 public Probe getProbe() {
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67 return probe;
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68 }
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69
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70 @SlowPath
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71 public boolean isTaggedAs(SyntaxTag tag) {
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72 return probe.isTaggedAs(tag);
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73 }
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74
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75 @SlowPath
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76 public Iterable<SyntaxTag> getSyntaxTags() {
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77 return probe.getSyntaxTags();
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78 }
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79
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80 @SlowPath
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81 public void tagAs(SyntaxTag tag) {
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82 probe.tagAs(tag);
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83 }
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84
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85 @Override
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86 public void executeVoid(VirtualFrame frame) {
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87 this.tagAs(StandardSyntaxTag.STATEMENT);
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88 probe.enter(child, frame);
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89
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90 try {
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91 child.executeVoid(frame);
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92 probe.leave(child, frame);
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93 } catch (KillException e) {
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94 throw (e);
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95 } catch (Exception e) {
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96 probe.leaveExceptional(child, frame, e);
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97 throw (e);
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98 }
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99 }
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100
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101 /**
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102 * Sets the parent pointer of this wrapper's child.
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103 */
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104 public void insertChild() {
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105 insert(this.child);
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106 }
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107 }