1 /*
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 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 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
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12  * version 2 for more details (a copy is included in the LICENSE file that
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24 
25 /*
26  * @test
27  * @summary Tests how CDS works when critical library classes are replaced with JVMTI ClassFileLoadHook
28  * @library /test/lib
29  * @requires vm.cds.write.archived.java.heap
30  * @modules java.base/jdk.internal.misc
31  * @build jdk.test.whitebox.WhiteBox
32  * @run driver jdk.test.lib.helpers.ClassFileInstaller -jar whitebox.jar jdk.test.whitebox.WhiteBox
33  * @run main/othervm/native ReplaceCriticalClassesForSubgraphs
34  */
35 
36 import java.util.ArrayList;
37 import java.util.Arrays;
38 import jdk.internal.misc.PreviewFeatures;
39 
40 public class ReplaceCriticalClassesForSubgraphs extends ReplaceCriticalClasses {
41     public static void main(String args[]) throws Throwable {
42         ReplaceCriticalClassesForSubgraphs rcc = new ReplaceCriticalClassesForSubgraphs();
43         rcc.process(args);
44     }
45 
46     public String[] getTests() {
47         ArrayList<String> tests = new ArrayList<String>(Arrays.asList(
48             // Try to replace classes that are used by the archived subgraph graphs. (CDS should be disabled)
49             "-early -notshared -subgraph java/lang/module/ResolvedModule jdk.internal.module.ArchivedModuleGraph",
50             "-early -notshared -subgraph java/lang/Integer java.lang.Integer$IntegerCache",
51 
52             // CDS should not be disabled -- these critical classes cannot be replaced because
53             // JvmtiExport::early_class_hook_env() is false.
54             "-subgraph java/lang/module/Configuration java.lang.module.Configuration",
55             "-subgraph java/lang/ModuleLayer java.lang.ModuleLayer",

56 
57             // Tests for archived full module graph. We cannot use whitebox, which requires appending to bootclasspath.
58             // VM will disable full module graph if bootclasspath is appended.
59             "-nowhitebox -early -notshared -subgraph java/lang/Module jdk.internal.module.ArchivedBootLayer",
60             "-nowhitebox -early -notshared -subgraph java/lang/ModuleLayer jdk.internal.module.ArchivedBootLayer",
61             "-nowhitebox -subgraph java/lang/Module jdk.internal.module.ArchivedBootLayer",
62             "-nowhitebox -subgraph java/lang/ModuleLayer jdk.internal.module.ArchivedBootLayer"));
63 
64         // IntegerCache does not exist in preview mode so it should not be expected in the output
65         if (!PreviewFeatures.isEnabled()) {
66             // CDS should not be disabled -- these critical classes cannot be replaced because
67             // JvmtiExport::early_class_hook_env() is false.
68             tests.add("-subgraph java/lang/Integer java.lang.Integer$IntegerCache");
69         }
70 
71         return tests.toArray(new String[0]);
72     }
73 }
--- EOF ---