1 /*

     2  * Copyright (c) 2018, 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 8202141

    27  * @summary Verify that .class synthetic Symbols are not duplicated.

    28  * @library /tools/javac/lib

    29  * @modules jdk.compiler/com.sun.tools.javac.api

    30  *          jdk.compiler/com.sun.tools.javac.code

    31  *          jdk.compiler/com.sun.tools.javac.tree

    32  *          jdk.compiler/com.sun.tools.javac.util

    33  * @build combo.ComboTestHelper

    34  * @run main ClassFieldDeduplication

    35  */

    36 

    37 import com.sun.source.util.TaskEvent;

    38 import com.sun.source.util.TaskListener;

    39 import com.sun.tools.javac.code.Symbol;

    40 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;

    41 import com.sun.tools.javac.tree.JCTree.JCFieldAccess;

    42 import com.sun.tools.javac.tree.TreeScanner;

    43 import combo.ComboInstance;

    44 import combo.ComboParameter;

    45 import combo.ComboTestHelper;

    46 

    47 public class ClassFieldDeduplication extends ComboInstance<ClassFieldDeduplication> {

    48 

    49     enum Type implements ComboParameter {

    50         OBJECT("Object"),

    51         PRIMITIVE("int"),

    52         BOXED_PRIMITIVE("Integer"),

    53         VOID("void"),

    54         BOXED_VOID("Void"),

    55         OBJECT_ARRAY("Object[]"),

    56         PRIMITIVE_ARRAY("int[]"),

    57         BOXED_PRIMITIVE_ARRAY("Integer[]"),

    58         BOXED_VOID_ARRAY("Void[]");

    59 

    60         String type;

    61 

    62         Type(String type) {

    63             this.type = type;

    64         }

    65 

    66         @Override

    67         public String expand(String optParameter) {

    68             return type;

    69         }

    70 

    71     }

    72 

    73     public static void main(String... args) throws Exception {

    74         new ComboTestHelper<ClassFieldDeduplication>()

    75                 .withDimension("TYPE", Type.values())

    76                 .run(ClassFieldDeduplication::new);

    77     }

    78 

    79     private static final String TEMPLATE =

    80             "class Test { void t() { Object o1 = #{TYPE}.class; Object o2 = #{TYPE}.class; } }";

    81 

    82     @Override

    83     protected void doWork() throws Throwable {

    84         newCompilationTask()

    85                 .withSourceFromTemplate(TEMPLATE)

    86                 .withListener(new TaskListener() {

    87                     JCCompilationUnit cut;

    88                         @Override

    89                         public void finished(TaskEvent e) {

    90                             if (e.getKind() == TaskEvent.Kind.PARSE) {

    91                                 if (cut != null)

    92                                     throw new AssertionError();

    93                                 cut = (JCCompilationUnit) e.getCompilationUnit();

    94                             }

    95                             if (e.getKind() == TaskEvent.Kind.ANALYZE) {

    96                                 cut.accept(new TreeScanner() {

    97                                     Symbol s;

    98                                     @Override

    99                                     public void visitSelect(JCFieldAccess tree) {

   100                                         if (tree.name.contentEquals("class")) {

   101                                             if (s == null) {

   102                                                 s = tree.sym;

   103                                             } else if (s != tree.sym) {

   104                                                 throw new AssertionError("Duplicated field symbol.");

   105                                             }

   106                                         }

   107                                         super.visitSelect(tree);

   108                                     }

   109                                 });

   110                             }

   111                         }

   112 

   113                 })

   114                 .analyze(els -> {});

   115     }

   116 

   117 }