1 /*
2 * Copyright (c) 2018, 2024, 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 package runtime.valhalla.inlinetypes;
24
25
26 import jdk.test.lib.Asserts;
27 import jdk.internal.vm.annotation.LooselyConsistentValue;
28 import jdk.internal.vm.annotation.ImplicitlyConstructible;
29 import jdk.internal.vm.annotation.NullRestricted;
30
31 /*
32 * @test
33 * @summary Flattenable field semantic test
34 * @library /test/lib
35 * @modules java.base/jdk.internal.vm.annotation
36 * @enablePreview
37 * @compile FlattenableSemanticTest.java
38 * @run main/othervm -XX:InlineFieldMaxFlatSize=64 runtime.valhalla.inlinetypes.FlattenableSemanticTest
39 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:ForceNonTearable=* runtime.valhalla.inlinetypes.FlattenableSemanticTest
40 */
41 public class FlattenableSemanticTest {
42
43 @ImplicitlyConstructible
44 @LooselyConsistentValue
45 static value class Point {
46 final int x = 0;
47 final int y = 0;
48 }
49
50 @ImplicitlyConstructible
51 @LooselyConsistentValue
52 public value class JumboInline {
53 final long l0 = 0;
54 final long l1 = 1;
55 final long l2 = 2;
56 final long l3 = 3;
57 final long l4 = 4;
58 final long l5 = 5;
59 final long l6 = 6;
60 final long l7 = 7;
61 final long l8 = 8;
62 final long l9 = 9;
63 final long l10 = 10;
64 final long l11 = 11;
65 final long l12 = 12;
66 final long l13 = 13;
67 final long l14 = 14;
68 final long l15 = 15;
69 final long l16 = 16;
70 final long l17 = 17;
71 final long l18 = 18;
72 final long l19 = 19;
73 }
74
75 static Point nfsp;
76 @NullRestricted
77 static Point fsp;
78
79 Point nfip;
80 @NullRestricted
81 Point fip;
82
83 static JumboInline nfsj;
84 @NullRestricted
85 static JumboInline fsj;
86
87 JumboInline nfij;
88 @NullRestricted
89 JumboInline fij;
90
91 static Object getNull() {
92 return null;
93 }
94
95 FlattenableSemanticTest() { }
96
97 public static void main(String[] args) {
98 FlattenableSemanticTest test = new FlattenableSemanticTest();
99
100 // Uninitialized inline fields must be null for non flattenable fields
101 Asserts.assertNull(nfsp, "Invalid non null value for unitialized non flattenable field");
102 Asserts.assertNull(nfsj, "Invalid non null value for unitialized non flattenable field");
103 Asserts.assertNull(test.nfip, "Invalid non null value for unitialized non flattenable field");
104 Asserts.assertNull(test.nfij, "Invalid non null value for unitialized non flattenable field");
105
106 // fsp.equals(null);
107
108 // Uninitialized inline fields must be non null for flattenable fields
109 Asserts.assertNotNull(fsp, "Invalid null value for unitialized flattenable field");
110 Asserts.assertNotNull(fsj, "Invalid null value for unitialized flattenable field");
111 Asserts.assertNotNull(test.fip, "Invalid null value for unitialized flattenable field");
112 Asserts.assertNotNull(test.fij, "Invalid null value for unitialized flattenable field");
113
114 // Assigning null must be allowed for non flattenable inline fields
115 boolean exception = true;
116 try {
117 nfsp = (Point)getNull();
118 nfsp = null;
119 exception = false;
120 } catch (NullPointerException e) {
121 exception = true;
122 }
123 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field");
124
125 try {
126 nfsj = (JumboInline)getNull();
127 nfsj = null;
128 exception = false;
129 } catch (NullPointerException e) {
130 exception = true;
131 }
132 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field");
133
134 try {
135 test.nfip = (Point)getNull();
136 test.nfip = null;
137 exception = false;
138 } catch (NullPointerException e) {
139 exception = true;
140 }
141 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field");
142
143 try {
144 test.nfij = (JumboInline)getNull();
145 test.nfij = null;
146 exception = false;
147 } catch (NullPointerException e) {
148 exception = true;
149 }
150 Asserts.assertFalse(exception, "Invalid NPE when assigning null to a non flattenable field");
151
152 // Assigning null to a flattenable inline field must trigger a NPE
153 exception = false;
154 try {
155 fsp = (Point)getNull();
156 } catch(NullPointerException e) {
157 exception = true;
158 }
159 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field");
160 exception = false;
161 try {
162 fsj = (JumboInline)getNull();
163 } catch(NullPointerException e) {
164 exception = true;
165 }
166 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field");
167 exception = false;
168 try {
169 test.fip = (Point)getNull();
170 } catch(NullPointerException e) {
171 exception = true;
172 }
173 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field");
174 exception = false;
175 try {
176 test.fij = (JumboInline)getNull();
177 } catch(NullPointerException e) {
178 exception = true;
179 }
180 Asserts.assertTrue(exception, "NPE not thrown when assigning null to a flattenable field");
181 exception = false;
182 }
183
184 }