RFR: 8291508: Fix some tests with "requires vm.continuations"

[Alan Bateman]

On Thu, 28 Jul 2022 16:11:12 GMT, Ao Qi <aoqi at openjdk.org> wrote:

> `vmTestbase/nsk/jvmti/GetThreadInfo/thrinfo001/TestDescription.java`, `vmTestbase/nsk/jvmti/RedefineClasses/StressRedefineVirtual/StressRedefineVirtual.java`, `java/beans/XMLDecoder/8028054/TestConstructorFinder.java` and `java/beans/XMLDecoder/8028054/TestMethodFinder.java` are added or modified by [JDK-8284161](https://bugs.openjdk.org/browse/JDK-8284161), and they are failed if Loom is not supported. Also, `vmTestbase/nsk/jvmti/GetThreadInfo/thrinfo001/TestDescription.java` and `vmTestbase/nsk/jvmti/RedefineClasses/StressRedefineVirtual/StressRedefineVirtual.java` need "requires vm.jvmti".
> 
> The issue could be reproduced by zero.

For the XMLDecoder tests then I think the issue is that it's using the 1-arg Class.forName rather than the 3-arg Class.forName. Can you try this:


diff --git a/test/jdk/java/beans/XMLDecoder/8028054/Task.java b/test/jdk/java/beans/XMLDecoder/8028054/Task.java
index 1d55fa8e358..add48336d16 100644
--- a/test/jdk/java/beans/XMLDecoder/8028054/Task.java
+++ b/test/jdk/java/beans/XMLDecoder/8028054/Task.java
@@ -130,8 +130,9 @@ abstract class Task<T> implements Runnable {
                 .map(s -> s.substring(s.indexOf("java")))
                 .collect(Collectors.toList());
 
+        ClassLoader scl = ClassLoader.getSystemClassLoader();
         for (String name : fileNames) {
-            classes.add(Class.forName(name));
+            classes.add(Class.forName(name, false, scl));
             if (count == classes.size()) {
                 break;
             }

-------------

PR: https://git.openjdk.org/jdk/pull/9677