8327829: [JVMCI] runtime/ClassUnload/ConstantPoolDependsTest.java fails on libgraal

Reviewed-by: dholmes, never

Author: Doug Simon

test/hotspot/jtreg/runtime/ClassUnload/ConstantPoolDependsTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -39,6 +39,8 @@
 import jdk.test.lib.classloader.ClassUnloadCommon;
 
 import java.lang.ref.Reference;
+import java.util.List;
+import java.util.Set;
 public class ConstantPoolDependsTest {
     public static WhiteBox wb = WhiteBox.getWhiteBox();
     public static final String MY_TEST = "ConstantPoolDependsTest$c1c";
@@ -78,10 +80,7 @@ static void test() throws Throwable {
 
     public static void main(String args[]) throws Throwable {
         test();
-        ClassUnloadCommon.triggerUnloading();  // should unload
-        System.gc();
-        System.out.println("Should unload p2.c2 just now");
-        ClassUnloadCommon.failIf(wb.isClassAlive(MY_TEST), "should be unloaded");
-        ClassUnloadCommon.failIf(wb.isClassAlive("p2.c2"), "should be unloaded");
+        Set<String> aliveClasses = ClassUnloadCommon.triggerUnloading(List.of(MY_TEST, "p2.c2"));
+        ClassUnloadCommon.failIf(!aliveClasses.isEmpty(), "should be unloaded: " + aliveClasses);
     }
 }