jdk20 OpenjDK java/lang/Thread/jni/AttachCurrentThread/AttachTest NullPointerException Cannot invoke "java.lang.invoke.MethodHandle.type()" because "target" is null

[pshipton]

https://openj9-jenkins.osuosl.org/job/Test_openjdk20_j9_sanity.openjdk_aarch64_linux_OpenJDK20/1
Most platforms, not platform specific. Didn't fail on Windows, AIX.
jdk_lang
java/lang/Thread/jni/AttachCurrentThread/AttachTest.java

10:29:53  Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.lang.invoke.MethodHandle.type()" because "target" is null
10:29:53  	at java.base/java.lang.invoke.MethodHandles.insertArgumentsChecks(MethodHandles.java:5218)
10:29:53  	at java.base/java.lang.invoke.MethodHandles.insertArguments(MethodHandles.java:5187)
10:29:53  	at java.base/jdk.internal.foreign.abi.SharedUtils.maybeInsertAllocator(SharedUtils.java:292)
10:29:53  	at java.base/jdk.internal.foreign.abi.AbstractLinker.lambda$downcallHandle$0(AbstractLinker.java:72)
10:29:53  	at java.base/jdk.internal.foreign.abi.SoftReferenceCache$Node.get(SoftReferenceCache.java:52)
10:29:53  	at java.base/jdk.internal.foreign.abi.SoftReferenceCache.get(SoftReferenceCache.java:38)
10:29:53  	at java.base/jdk.internal.foreign.abi.AbstractLinker.downcallHandle(AbstractLinker.java:68)
10:29:53  	at java.base/java.lang.foreign.Linker.downcallHandle(Linker.java:213)
10:29:53  	at ImplicitAttach.main(ImplicitAttach.java:67)

[pshipton]

@tajila fyi

[babsingh]

jdk/internal/foreign/abi/AbstractLinker.java#L71-L72

AbstractLinker.downcallHandle(...) {
            MethodHandle handle = arrangeDowncall(type, fd, linkRequest.options());
            handle = SharedUtils.maybeInsertAllocator(fd, handle);
            return handle;

The MethodHandle generated by arrangeDowncall is NULL. The NULL MethodHandle is passed from AbstractLinker.lambda$downcallHandle$0 to MethodHandles.insertArgumentsChecks.

This failure is due to missing features for Foreign Function & Memory API (Second Preview): https://openjdk.org/jeps/434.

Related: #16329.

++@ChengJin01 to confirm the above details and decide if the test should be disabled since FFI specific code has been temporarily disabled in JDK20, ref: #16329 (comment)?

[ChengJin01]

@babsingh, the test suite should be excluded given all FFI related code are disabled in JDK20 for the moment and not yet updated against the latest APIs in which case we have been working on.

[ChengJin01]

@pshipton, given we have #16565 opened to keep track of all excluded FFI jtreg test suites, can we close this issue as this failing test suite was excluded via adoptium/aqa-tests#4318?

[babsingh]

can we close this issue as a duplicate?

@ChengJin01 Yes. In adoptium/aqa-tests#4318, the test is currently disabled by referring to this issue (#16656). Before closing this issue as a duplicate of #16565, we will have to disable the test by referring to #16565.

[ChengJin01]

PR is created at adoptium/aqa-tests#4324 to replace #16656 with #16565.

[ChengJin01]

adoptium/aqa-tests#4324 was merged.