1 /*
 2  * Copyright (c) 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
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22  */
23 
24 /*
25  * @test
26  * @enablePreview
27  * @compile strictFields.jasm
28  * @run main/othervm -Xverify:remote StrictFields
29  */
30 
31 public class StrictFields {
32     public static void main(String[] args) throws Throwable {
33 
34         // First load a class where strict should be ignored
35         Class<?> c = Class.forName("StrictIgnore");
36 
37         // Now load a well-formed strict-using value class
38         c = Class.forName("StrictBase");
39 
40         // Now a bad class
41         try {
42             c = Class.forName("PostInitStrict");
43             throw new Error("VerifyError was not thrown as expected!");
44         } catch (VerifyError ve) {
45             // Once strict non-final is possible, expect "Illegal use of putfield on a strict field"
46             if (!ve.getMessage().startsWith("All strict final fields must be initialized before super()")) {
47                 throw new Error("Wrong VerifyError thrown", ve);
48             } else {
49                 System.out.println("Expected VerifyError was thrown");
50             }
51         }
52 
53         // Now a bad class that tries to write to a super class's strict field
54         // in the preinit phase
55         try {
56             c = Class.forName("BadStrictSubPreInit");
57             throw new Error("VerifyError was not thrown as expected!");
58         } catch (VerifyError ve) {
59             if (!ve.getMessage().startsWith("Bad type on operand stack")) {
60                 throw new Error("Wrong VerifyError thrown", ve);
61             } else {
62                 System.out.println("Expected VerifyError was thrown");
63             }
64         }
65 
66         // Now a bad class that tries to write to a super class's strict field
67         // in the post phase. This is not a verification error but we test it
68         // here for completeness.Expected exception:
69         //    java.lang.IllegalAccessError: Update to non-static final field
70         //      BadStrictSubPostInit.x attempted from a different class
71         //       (BadStrictSubPostInit) than the field's declaring class
72         try {
73             c = Class.forName("BadStrictSubPostInit");
74             Object o = c.newInstance();
75             throw new Error("IllegalAccessErrorError was not thrown as expected!");
76         } catch (IllegalAccessError iae) {
77             if (!iae.getMessage().startsWith("Update to non-static final field")) {
78                 throw new Error("Wrong IllegalAccessError thrown", iae);
79             } else {
80                 System.out.println("Expected IllegalAccessError was thrown");
81             }
82         }
83 
84     }
85 }