[JDK20/FFI_Jtreg] IndexOutOfBoundsException captured in VaListTest

[ChengJin01]

IndexOutOfBoundsException was captured in VaListTest.testVaListMemorySegment() on zLinux as follows:

 VaListTest$$Lambda$239/0x00000000c017bc68@b814d76c, a64): failure
java.lang.IndexOutOfBoundsException: Out of bound access on segment MemorySegment{ array: Optional.empty address:139847358506464 limit: 0 }; new offset = 0; new length = 4
        at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.outOfBoundException(AbstractMemorySegmentImpl.java:371)
        at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.apply(AbstractMemorySegmentImpl.java:357)
        at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.apply(AbstractMemorySegmentImpl.java:70)
        at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:98)
        at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:124)
        at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:448)
        at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.checkBounds(AbstractMemorySegmentImpl.java:346)
        at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.checkAccess(AbstractMemorySegmentImpl.java:311)
        at java.base/java.lang.invoke.VarHandleSegmentAsInts.checkAddress(VarHandleSegmentAsInts.java:81)
        at java.base/java.lang.invoke.VarHandleSegmentAsInts.get(VarHandleSegmentAsInts.java:108)
        at java.base/java.lang.foreign.MemorySegment.get(MemorySegment.java:1552)
        at VaListTest.lambda$pointers$16(VaListTest.java:244) <--------
        at VaListTest.testVaListMemorySegment(VaListTest.java:267) <----------
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)

against the test code at
https://github.com/ibmruntimes/openj9-openjdk-jdk20/blob/9fcbd19b761da90ae3d1fc9b8692c63e8267d5b7/test/jdk/java/foreign/valist/VaListTest.java#L244

    public static Object[][] pointers() {
        Function<ValueLayout.OfAddress, Function<VaList, Integer>> getIntJavaFact = layout ->
                list -> {
                    MemorySegment ma = list.nextVarg(layout);
                    return ma.get(JAVA_INT, 0); <---------
                };

FYI: @tajila, @pshipton

[ChengJin01]

This is likely due to the new changes in JDK20 in which MemoryAddress was replaced with MemorySegment. In such case, list.nextVarg on zLinux somehow returns a zero-sized MemorySegment which can't be directly accessed.

[ChengJin01]

I will create a PR in aqa-test to exclude this test suite given everything related to VaList was totally removed in the latest JEP442 (Third Preview) mentioned at #16951 which means there is no need to resolve VaList related issue from now on.