1 /*
2 * Copyright (c) 2018, 2021, 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 package runtime.valhalla.inlinetypes;
25
26 import jdk.test.lib.Asserts;
27
28 /*
29 * @test CheckcastTest
30 * @summary checkcast bytecode test
31 * @library /test/lib
32 * @compile VDefaultTest.java
33 * @run main runtime.valhalla.inlinetypes.CheckcastTest
34 */
35
36 public class CheckcastTest {
37
38 static primitive class Point {
39 int x;
40 int y;
41
42 public Point() {
43 x = 0;
44 y = 0;
45 }
46
47 public Point(int x, int y) {
48 this.x = x;
49 this.y = y;
50 }
51 }
52
53
54 static void testCastingFromObjectToVal(Object o) {
55 boolean npe = false;
56 try {
57 Point pv = (Point)o;
58 } catch(NullPointerException e) {
59 npe = true;
60 }
61 Asserts.assertTrue(npe == false || o == null, "Casting null to val should throw a NPE");
62 }
63
64 static void testCastingFromValToBox(Point p) {
65 boolean npe = false;
66 try {
67 Point.ref pb = p;
68 } catch(NullPointerException e) {
69 npe = true;
70 }
71 Asserts.assertFalse(npe, "Casting from val to box should not throw an NPE");
72 }
73
74 static void testCastingFromBoxToVal(Point.ref p) {
75 boolean npe = false;
76 try {
77 Point pv = (Point) p;
78 } catch(NullPointerException e) {
79 npe = true;
80 }
81 if (npe) {
82 Asserts.assertEquals(p, null, "NPE must be thrown only if p is null");
83 } else {
84 Asserts.assertNotEquals(p, null, "Casting null to val must thrown a NPE");
85 }
86
87 }
88
89 public static void main(String[] args) {
90 // Testing casting from box to val
91 // First invocation: casting null to Point with an unresolved class entry
92 testCastingFromBoxToVal(null);
93 // Second invocation: casting non-null to val, will trigger resolution of the class entry
94 testCastingFromBoxToVal(new Point(3,4));
95 // Third invocation: casting null to Point with a resolved class entry
96 testCastingFromBoxToVal(null);
97
98 // Testing casting from val to box
99 testCastingFromBoxToVal(new Point(3,4));
100
101 // Testing casting from object to val
102 // First invocation: casting null to Point with an unresolved class entry
103 testCastingFromObjectToVal(null);
104 // Second invocation: casting non-null to al, will trigger resolution of the class entry
105 testCastingFromObjectToVal(new Point(3,4));
106 // Third invocation: casting null to Point with a resolved class entry");
107 testCastingFromObjectToVal(null);
108 // Fourth invocation: with something not the right type
109 boolean cce = false;
110 try {
111 testCastingFromObjectToVal(new String("NotPoint"));
112 } catch(ClassCastException e) {
113 cce = true;
114 }
115 Asserts.assertTrue(cce,"casting invalid type to val should throw CCE");
116 }
117 }