JDK-8003985 introduced "packed offsets" in InstanceKlass' fields array, so code accessing field offset in InstanceKlass was changed accordingly. But the change in the SA part mistakenly used FIELDINFO_TAG_SIZE instead of FIELDINFO_TAG_MASK for masking in InstanceKlass.getFieldOffset(), which broke a couple of utils in SA, e.g. PStack.
JDK-8006403 Regression: jstack failed due to the FieldInfo regression in SA
JDK-8003985 Support @Contended Annotation - JEP 142
