Wed, 05 Sep 2018 01:21:35 -0700
Added tag jdk8u192-b09 for changeset 456c0d45c43b
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 * JDK-8134609: Allow constructors with same prototoype map to share the allocator map
26 *
27 * @test
28 * @run
29 * @fork
30 * @option -Dnashorn.debug
31 */
33 function createProto(members) {
34 function P() {
35 for (var id in members) {
36 if (members.hasOwnProperty(id)) {
37 this[id] = members[id];
38 }
39 }
40 return this;
41 }
42 return new P();
43 }
45 function createSubclass(prototype, members) {
46 function C() {
47 for (var id in members) {
48 if (members.hasOwnProperty(id)) {
49 this[id] = members[id];
50 }
51 }
52 return this;
53 }
55 C.prototype = prototype;
57 return new C();
58 }
60 function assertP1(object, value) {
61 Assert.assertTrue(object.p1 === value);
62 }
64 // First prototype will have non-shared proto-map. Second and third will be shared.
65 var proto0 = createProto({p1: 0, p2: 1});
66 var proto1 = createProto({p1: 1, p2: 2});
67 var proto2 = createProto({p1: 2, p2: 3});
69 Assert.assertTrue(Debug.map(proto1) === Debug.map(proto2));
71 assertP1(proto1, 1);
72 assertP1(proto2, 2);
74 // First instantiation will have a non-shared prototype map, from the second one
75 // maps will be shared until a different proto map comes along.
76 var child0 = createSubclass(proto1, {c1: 1, c2: 2});
77 var child1 = createSubclass(proto2, {c1: 2, c2: 3});
78 var child2 = createSubclass(proto1, {c1: 3, c2: 4});
79 var child3 = createSubclass(proto2, {c1: 1, c2: 2});
80 var child4 = createSubclass(proto0, {c1: 3, c2: 2});
82 Assert.assertTrue(Debug.map(child1) === Debug.map(child2));
83 Assert.assertTrue(Debug.map(child1) === Debug.map(child3));
84 Assert.assertTrue(Debug.map(child3) !== Debug.map(child4));
86 assertP1(child1, 2);
87 assertP1(child2, 1);
88 assertP1(child3, 2);
89 assertP1(child4, 0);
91 Assert.assertTrue(delete proto2.p1);
93 assertP1(child3, undefined);
94 assertP1(child2, 1);
95 Assert.assertTrue(Debug.map(child1) !== Debug.map(child3));