Thu, 12 Jan 2012 15:28:34 +0000
7123100: javac fails with java.lang.StackOverflowError
Summary: Inference of under-constrained type-variables creates erroneous recursive wildcard types
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2001, 2011, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javadoc;
28 import com.sun.tools.javac.util.Context;
29 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
30 import com.sun.tools.javac.util.List;
31 import com.sun.tools.javac.code.Kinds;
32 import com.sun.tools.javac.code.Symbol.*;
33 import com.sun.tools.javac.comp.Enter;
34 import com.sun.tools.javac.tree.JCTree.*;
35 import javax.tools.JavaFileObject;
37 /**
38 * Javadoc's own enter phase does a few things above and beyond that
39 * done by javac.
40 * @author Neal Gafter
41 */
42 public class JavadocEnter extends Enter {
43 public static JavadocEnter instance0(Context context) {
44 Enter instance = context.get(enterKey);
45 if (instance == null)
46 instance = new JavadocEnter(context);
47 return (JavadocEnter)instance;
48 }
50 public static void preRegister(Context context) {
51 context.put(enterKey, new Context.Factory<Enter>() {
52 public Enter make(Context c) {
53 return new JavadocEnter(c);
54 }
55 });
56 }
58 protected JavadocEnter(Context context) {
59 super(context);
60 messager = Messager.instance0(context);
61 docenv = DocEnv.instance(context);
62 }
64 final Messager messager;
65 final DocEnv docenv;
67 @Override
68 public void main(List<JCCompilationUnit> trees) {
69 // count all Enter errors as warnings.
70 int nerrors = messager.nerrors;
71 super.main(trees);
72 messager.nwarnings += (messager.nerrors - nerrors);
73 messager.nerrors = nerrors;
74 }
76 @Override
77 public void visitTopLevel(JCCompilationUnit tree) {
78 super.visitTopLevel(tree);
79 if (tree.sourcefile.isNameCompatible("package-info", JavaFileObject.Kind.SOURCE)) {
80 String comment = tree.docComments.get(tree);
81 docenv.makePackageDoc(tree.packge, comment, tree);
82 }
83 }
85 @Override
86 public void visitClassDef(JCClassDecl tree) {
87 super.visitClassDef(tree);
88 if (tree.sym == null) return;
89 if (tree.sym.kind == Kinds.TYP || tree.sym.kind == Kinds.ERR) {
90 String comment = env.toplevel.docComments.get(tree);
91 ClassSymbol c = tree.sym;
92 docenv.makeClassDoc(c, comment, tree, env.toplevel.lineMap);
93 }
94 }
96 /** Don't complain about a duplicate class. */
97 @Override
98 protected void duplicateClass(DiagnosticPosition pos, ClassSymbol c) {}
100 }