Fri, 24 Apr 2020 03:58:51 +0100
Merge
1 /*
2 * Copyright (c) 2015, 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 */
24 /*
25 * @test
26 * @bug 8039262
27 * @summary Ensure that using Types.membersClosure does not increase the number of listeners on the
28 * class's members Scope.
29 */
31 import com.sun.tools.javac.code.Scope;
32 import com.sun.tools.javac.code.Symbol;
33 import com.sun.tools.javac.code.Symtab;
34 import com.sun.tools.javac.code.Types;
35 import com.sun.tools.javac.file.JavacFileManager;
36 import com.sun.tools.javac.util.Context;
37 import com.sun.tools.javac.util.Names;
38 import java.lang.reflect.Field;
39 import java.util.Collection;
41 public class ScopeListenerTest {
43 public static void main(String[] args) throws Exception {
44 new ScopeListenerTest().run();
45 }
47 void run() throws Exception {
48 Context context = new Context();
49 JavacFileManager.preRegister(context);
50 Types types = Types.instance(context);
51 Symtab syms = Symtab.instance(context);
52 Names names = Names.instance(context);
53 types.membersClosure(syms.stringType, true);
54 types.membersClosure(syms.stringType, false);
56 Field listenersField = Scope.class.getDeclaredField("listeners");
58 listenersField.setAccessible(true);
60 int listenerCount =
61 ((Collection) listenersField.get(syms.stringType.tsym.members())).size();
63 for (int i = 0; i < 100; i++) {
64 types.membersClosure(syms.stringType, true);
65 types.membersClosure(syms.stringType, false);
66 }
68 int newListenerCount
69 = ((Collection) listenersField.get(syms.stringType.tsym.members())).size();
71 if (listenerCount != newListenerCount) {
72 throw new AssertionError("Orig listener count: " + listenerCount +
73 "; new listener count: " + newListenerCount);
74 }
76 for (Symbol s : types.membersClosure(syms.stringType, true).getElements())
77 ;
78 for (Symbol s : types.membersClosure(syms.stringType, false).getElementsByName(names.fromString("substring")))
79 ;
80 }
82 }