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
21  * questions.
22  */
23 
24 /*
25  * @test
26  * @bug 8336829
27  * @library /test/lib
28  * @summary Test that redefinition of a value class containing Throwable refs does not leak constant pool
29  * @enablePreview
30  * @modules java.base/jdk.internal.misc
31  * @modules java.instrument
32  *          java.compiler
33  * @run main RedefineClassHelper
34  * @run main/othervm/timeout=6000 --enable-preview -Xlog:class+load,gc+metaspace+freelist+oom:rt.log -javaagent:redefineagent.jar -XX:MetaspaceSize=23m -XX:MaxMetaspaceSize=23m RedefineLeakThrowableValue
35  */
36 
37 import jdk.test.lib.compiler.InMemoryJavaCompiler;
38 
39 value class Tester {
40     void test() {
41         try {
42             int i = 42;
43         } catch (Throwable t) {
44             t.printStackTrace();
45         }
46     }
47 }
48 
49 public class RedefineLeakThrowableValue {
50 
51     static final String NEW_TESTER =
52         "value class Tester {" +
53         "   void test() {" +
54         "        try {" +
55         "            int i = 42;" +
56         "        } catch (Throwable t) {" +
57         "            t.printStackTrace();" +
58         "        }" +
59         "    }" +
60         "}";
61 
62 
63     public static void main(String argv[]) throws Exception {
64         String java_version = System.getProperty("java.specification.version");
65         // Load InMemoryJavaCompiler outside the redefinition loop to prevent random lambdas that load and fill up metaspace.
66         byte[] bytecodes = InMemoryJavaCompiler.compile("Tester", NEW_TESTER,
67                                                         "-source", java_version, "--enable-preview",
68                                                         "--add-exports", "java.base/jdk.internal.vm.annotation=ALL-UNNAMED");
69         for (int i = 0; i < 700; i++) {
70             RedefineClassHelper.redefineClass(Tester.class, bytecodes);
71         }
72     }
73 }