1 /*
2 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 7021183 7025809
27 * @summary 269: assertion failure getting enclosing element of an undefined name
28 * @modules jdk.compiler/com.sun.tools.javac.code:+open
29 * jdk.compiler/com.sun.tools.javac.file
30 * jdk.compiler/com.sun.tools.javac.main
31 * jdk.compiler/com.sun.tools.javac.model
32 * jdk.compiler/com.sun.tools.javac.util
33 */
34
35 import java.lang.reflect.Field;
36
37 import javax.lang.model.element.Element;
38 import javax.lang.model.element.ExecutableElement;
39 import javax.lang.model.element.ModuleElement;
40 import javax.lang.model.element.PackageElement;
41 import javax.lang.model.element.TypeElement;
42 import javax.lang.model.element.TypeParameterElement;
43 import javax.lang.model.element.UnknownElementException;
44 import javax.lang.model.element.VariableElement;
45 import javax.lang.model.type.TypeMirror;
46 import javax.lang.model.type.UnknownTypeException;
47 import javax.lang.model.util.*;
48
49 import com.sun.tools.javac.code.Symbol.ClassSymbol;
50 import com.sun.tools.javac.code.Symtab;
51 import com.sun.tools.javac.file.JavacFileManager;
52 import com.sun.tools.javac.main.JavaCompiler;
53 import com.sun.tools.javac.model.JavacTypes;
54 import com.sun.tools.javac.util.Context;
55
56 /**
57 * Scan javac Symtab looking for TypeMirrors and Elements, and ensure that
58 * no exceptions are thrown when used with javax.lang.model visitors.
59 *
60 */
61 public class TestSymtabItems {
62 public static void main(String... args) throws Exception {
63 new TestSymtabItems().run();
64 }
65
66 void run() throws Exception {
67 Context c = new Context();
68 JavacFileManager.preRegister(c);
69 Symtab syms = Symtab.instance(c);
70 JavacTypes types = JavacTypes.instance(c);
71 JavaCompiler.instance(c); // will init ClassReader.sourceCompleter
72
73 // print("noSymbol", syms.noSymbol);
74 // print("errSymbol", syms.errSymbol);
75 // print("unknownSymbol", syms.unknownSymbol);
76 // print("botType", syms.botType);
77 // print("errType", syms.errType);
78 // print("unknownType", syms.unknownType);
79
80 for (Field f: Symtab.class.getDeclaredFields()) {
81 // System.err.println(f.getType() + " " + f.getName());
82
83 // Temporarily ignore methodHandle and transientMethodHandle
84 // during API evolution
85 if (f.getName().toLowerCase().contains("methodhandle"))
86 continue;
87
88 //both noModule and unnamedModule claim the unnamed package, ignore noModule for now:
89 if (f.getName().equals("noModule"))
90 continue;
91
92 f.setAccessible(true);
93 Class<?> ft = f.getType();
94 if (TypeMirror.class.isAssignableFrom(ft))
95 print(f.getName(), (TypeMirror) f.get(syms), types);
96 else if(Element.class.isAssignableFrom(ft))
97 print(f.getName(), (Element) f.get(syms));
98 }
99
100 if (errors > 0)
101 throw new Exception(errors + " errors occurred");
102 }
103
104 void print(String label, Element e) {
105 ElemPrinter ep = new ElemPrinter();
106 System.err.println("Test " + label);
107 ep.visit(e);
108 System.err.println();
109 }
110
111 void print(String label, TypeMirror t, Types types) {
112 TypePrinter tp = new TypePrinter();
113 System.err.println("Test " + label);
114 tp.visit(t, types);
115 System.err.println();
116 }
117
118 void error(String msg) {
119 System.err.println("Error: " + msg);
120 errors++;
121 }
122
123 int errors;
124
125 class ElemPrinter extends ElementScanner9<Void, Void> {
126 @Override
127 public Void visitModule(ModuleElement e, Void p) {
128 show("module", e);
129 indent(+1);
130 super.visitModule(e, p);
131 indent(-1);
132 return null;
133 }
134
135 @Override
136 public Void visitPackage(PackageElement e, Void p) {
137 show("package", e);
138 indent(+1);
139 super.visitPackage(e, p);
140 indent(-1);
141 return null;
142 }
143
144 @Override
145 public Void visitType(TypeElement e, Void p) {
146 show("type", e);
147 indent(+1);
148 super.visitType(e, p);
149 indent(-1);
150 return null;
151 }
152
153 @Override
154 public Void visitVariable(VariableElement e, Void p) {
155 show("variable", e);
156 indent(+1);
157 super.visitVariable(e, p);
158 indent(-1);
159 return null;
160 }
161
162 @Override
163 public Void visitExecutable(ExecutableElement e, Void p) {
164 show("executable", e);
165 indent(+1);
166 super.visitExecutable(e, p);
167 indent(-1);
168 return null;
169 }
170
171 @Override
172 public Void visitTypeParameter(TypeParameterElement e, Void p) {
173 show("type parameter", e);
174 indent(+1);
175 super.visitTypeParameter(e, p);
176 indent(-1);
177 return null;
178 }
179
180 @Override
181 public Void visitUnknown(Element e, Void p) {
182 show("unknown", e);
183 indent(+1);
184 try {
185 super.visitUnknown(e, p);
186 } catch (UnknownElementException ex) {
187 System.err.println("caught " + ex);
188 }
189 indent(-1);
190 return null;
191 }
192
193 void indent(int i) {
194 indent += i;
195 }
196
197 String sp(int w) {
198 StringBuilder sb = new StringBuilder();
199 for (int i = 0; i < w; i++)
200 sb.append(" ");
201 return sb.toString();
202 }
203
204 void show(String label, Element e) {
205 System.err.println(sp(indent) + label
206 + ": mods:" + e.getModifiers()
207 + " " + e.getSimpleName()
208 + ", kind: " + e.getKind()
209 + ", type: " + e.asType()
210 + ", encl: " + e.getEnclosingElement());
211
212 // The following checks help establish why NPE might occur when trying to scan children
213 if (e instanceof ClassSymbol) {
214 ClassSymbol csym = (ClassSymbol) e;
215 if (csym.members_field == null)
216 error("members_field is null");
217 if (csym.type == null)
218 System.err.println("type is null");
219 }
220 }
221
222 int indent;
223 };
224
225 class TypePrinter extends SimpleTypeVisitor9<Void, Types> {
226 @Override
227 public Void defaultAction(TypeMirror m, Types types) {
228 System.err.println(m.getKind() + " " + m + " " + types.asElement(m));
229 return null;
230 }
231
232 @Override
233 public Void visitUnknown(TypeMirror t, Types types) {
234 try {
235 return super.visitUnknown(t, types);
236 } catch (UnknownTypeException ex) {
237 System.err.println("caught " + ex);
238 return null;
239 }
240 }
241 };
242 }