The test TestMatrix.java was failing in JDK 19.0.1 b03 due to the changes done by https://bugs.openjdk.org/browse/JDK-8287158

java/foreign/TestMatrix.java#Downcall-F
java/foreign/TestMatrix.java#Downcall-T

The class TestDownCall.java is removed and new classes has been added as part of JDK-8287158. After doing the necessary changes in the test , it is passing.

Few more test in TestMatrix.java is failing, due to the change in src/java.base/share/classes/jdk/internal/foreign/abi/aarch64/CallArranger.java which has been done to reject certain type of call shapes to prevent undefined behavior down the line.

java/foreign/TestMatrix.java#UpcallStack-FF
java/foreign/TestMatrix.java#UpcallStack-FT
java/foreign/TestMatrix.java#UpcallStack-TF
java/foreign/TestMatrix.java#UpcallStack-TT