Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/codewriter/FixWarningsVisitor.java @ 9799:41de6947dbc9
VerifyUsageWithEquals: check for null before passing it to isAssignableForm()
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Thu, 23 May 2013 10:57:51 +0200 |
parents | 5e3d1a68664e |
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rev | line source |
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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. |
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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.codegen.processor.codewriter; |
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24 |
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25 import static com.oracle.truffle.codegen.processor.Utils.*; |
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26 import static javax.lang.model.element.Modifier.*; |
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27 |
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28 import java.io.*; |
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29 import java.util.*; |
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30 |
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31 import javax.lang.model.element.*; |
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32 import javax.lang.model.type.*; |
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33 |
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34 import com.oracle.truffle.codegen.processor.*; |
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35 import com.oracle.truffle.codegen.processor.ast.*; |
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36 |
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37 public class FixWarningsVisitor extends CodeElementScanner<Void, Void> { |
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38 |
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39 private final Set<String> symbolsUsed = new HashSet<>(); |
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40 |
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41 private final ProcessorContext context; |
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42 private final DeclaredType unusedAnnotation; |
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43 private final DeclaredType overrideType; |
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44 |
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45 public FixWarningsVisitor(ProcessorContext context, DeclaredType unusedAnnotation, DeclaredType overrideType) { |
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46 this.context = context; |
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47 this.unusedAnnotation = unusedAnnotation; |
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48 this.overrideType = overrideType; |
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49 } |
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50 |
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51 @Override |
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52 public Void visitType(CodeTypeElement e, Void p) { |
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53 List<TypeElement> superTypes = Utils.getSuperTypes(e); |
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54 for (TypeElement type : superTypes) { |
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55 String qualifiedName = Utils.getQualifiedName(type); |
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56 if (qualifiedName.equals(Serializable.class.getCanonicalName())) { |
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57 if (!e.containsField("serialVersionUID")) { |
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58 e.add(new CodeVariableElement(modifiers(PRIVATE, STATIC, FINAL), context.getType(long.class), "serialVersionUID", "1L")); |
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59 } |
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60 break; |
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61 } |
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62 } |
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63 |
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64 return super.visitType(e, p); |
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65 } |
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66 |
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67 @Override |
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68 public Void visitExecutable(CodeExecutableElement e, Void p) { |
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69 if (e.getParameters().isEmpty()) { |
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70 return null; |
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71 } else if (e.getModifiers().contains(Modifier.ABSTRACT)) { |
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72 return null; |
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73 } else if (containsOverride(e)) { |
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74 return null; |
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75 } |
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76 |
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77 symbolsUsed.clear(); |
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78 super.visitExecutable(e, p); |
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79 if (e.getBodyTree() == null && e.getBody() != null) { |
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80 computeSymbols(e.getBody()); |
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81 } |
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82 |
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83 for (VariableElement parameter : e.getParameters()) { |
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84 if (!symbolsUsed.contains(parameter.getSimpleName().toString())) { |
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85 e.getAnnotationMirrors().add(createUnusedAnnotationMirror()); |
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86 break; |
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87 } |
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88 } |
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89 return null; |
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90 } |
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91 |
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92 private boolean containsOverride(CodeExecutableElement e) { |
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93 for (AnnotationMirror mirror : e.getAnnotationMirrors()) { |
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94 if (Utils.typeEquals(overrideType, mirror.getAnnotationType())) { |
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95 return true; |
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96 } |
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97 } |
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98 return false; |
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99 } |
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100 |
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101 private CodeAnnotationMirror createUnusedAnnotationMirror() { |
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102 CodeAnnotationMirror mirror = new CodeAnnotationMirror(unusedAnnotation); |
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103 mirror.setElementValue(mirror.findExecutableElement("value"), new CodeAnnotationValue("unused")); |
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104 return mirror; |
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105 } |
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106 |
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107 @Override |
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108 public void visitTree(CodeTree e, Void p) { |
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109 if (e.getString() != null) { |
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110 computeSymbols(e.getString()); |
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111 } |
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112 super.visitTree(e, p); |
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113 } |
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114 |
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115 private void computeSymbols(String s) { |
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116 // TODO there should not be any need for a StringTokenizer if we have a real AST for |
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117 // method bodies. Also the current solution is not perfect. What if one token |
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118 // is spread across multiple CodeTree instances? But for now that works. |
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119 StringTokenizer tokenizer = new StringTokenizer(s, ".= :,()[];{}\"\"'' ", false); |
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120 while (tokenizer.hasMoreElements()) { |
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121 String token = tokenizer.nextToken().trim(); |
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122 if (token.length() > 0) { |
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123 symbolsUsed.add(token); |
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124 } |
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125 } |
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126 } |
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127 |
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128 } |