1 /*
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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  * @build jdk.test.whitebox.WhiteBox
31  * @run driver jdk.test.lib.helpers.ClassFileInstaller -jar whitebox.jar jdk.test.whitebox.WhiteBox
32  * @run main/othervm/native ReplaceCriticalClassesForSubgraphs
33  */
34 
35 public class ReplaceCriticalClassesForSubgraphs extends ReplaceCriticalClasses {
36     public static void main(String args[]) throws Throwable {
37         ReplaceCriticalClassesForSubgraphs rcc = new ReplaceCriticalClassesForSubgraphs();
38         rcc.process(args);
39     }
40 
41     public String[] getTests() {
42         String tests[] = {
43             // Try to replace classes that are used by the archived subgraph graphs. (CDS should be disabled)
44             "-early -notshared -subgraph java/lang/module/ResolvedModule jdk.internal.module.ArchivedModuleGraph",
45             "-early -notshared -subgraph java/lang/Integer java.lang.Integer$IntegerCache",
46 
47             // CDS should not be disabled -- these critical classes cannot be replaced because
48             // JvmtiExport::early_class_hook_env() is false.
49             "-subgraph java/lang/module/Configuration java.lang.module.Configuration",
50             "-subgraph java/lang/ModuleLayer java.lang.ModuleLayer",
51             "-subgraph java/lang/Integer java.lang.Integer$IntegerCache",
52 
53             // Tests for archived full module graph. We cannot use whitebox, which requires appending to bootclasspath.
54             // VM will disable full module graph if bootclasspath is appended.
55             "-nowhitebox -early -notshared -subgraph java/lang/Module jdk.internal.module.ArchivedBootLayer",
56             "-nowhitebox -early -notshared -subgraph java/lang/ModuleLayer jdk.internal.module.ArchivedBootLayer",
57             "-nowhitebox -subgraph java/lang/Module jdk.internal.module.ArchivedBootLayer",
58             "-nowhitebox -subgraph java/lang/ModuleLayer jdk.internal.module.ArchivedBootLayer",
59         };
60         return tests;
61     }
62 }