[BUG] Native compilation has RecomputeFieldValue warnings

[artpaym]

Description: When compiling a project with fastjson2 in native mode, the build logs have the following:

Warning: RecomputeFieldValue.FieldOffset automatic field value transformation failed. The automatic registration was attempted because a call to sun.misc.Unsafe.objectFieldOffset(Field) was detected in the class initializer of com.alibaba.fastjson2.util.JDKUtils. Detailed failure reason(s): Could not determine the field where the value produced by the call to sun.misc.Unsafe.objectFieldOffset(Field) for the field offset computation is stored. The call is not directly followed by a field store or by a sign extend node followed directly by a field store.
Warning: RecomputeFieldValue.FieldOffset automatic field value transformation failed. The automatic registration was attempted because a call to sun.misc.Unsafe.objectFieldOffset(Field) was detected in the class initializer of com.alibaba.fastjson2.util.JDKUtils. Detailed failure reason(s): Could not determine the field where the value produced by the call to sun.misc.Unsafe.objectFieldOffset(Field) for the field offset computation is stored. The call is not directly followed by a field store or by a sign extend node followed directly by a field store.
Warning: RecomputeFieldValue.FieldOffset automatic field value transformation failed. The automatic registration was attempted because a call to sun.misc.Unsafe.objectFieldOffset(Field) was detected in the class initializer of com.alibaba.fastjson2.util.JDKUtils. Detailed failure reason(s): Could not determine the field where the value produced by the call to sun.misc.Unsafe.objectFieldOffset(Field) for the field offset computation is stored. The call is not directly followed by a field store or by a sign extend node followed directly by a field store.
Warning: RecomputeFieldValue.FieldOffset automatic field value transformation failed. The automatic registration was attempted because a call to sun.misc.Unsafe.objectFieldOffset(Field) was detected in the class initializer of com.alibaba.fastjson2.util.JDKUtils. Detailed failure reason(s): The argument of sun.misc.Unsafe.objectFieldOffset(java.lang.reflect.Field) is not a constant value or a field load that can be constant-folded., Could not determine the field where the value produced by the call to sun.misc.Unsafe.objectFieldOffset(Field) for the field offset computation is stored. The call is not directly followed by a field store or by a sign extend node followed directly by a field store.
Warning: RecomputeFieldValue.FieldOffset automatic field value transformation failed. The automatic registration was attempted because a call to sun.misc.Unsafe.objectFieldOffset(Field) was detected in the class initializer of com.alibaba.fastjson2.util.JDKUtils. Detailed failure reason(s): Could not determine the field where the value produced by the call to sun.misc.Unsafe.objectFieldOffset(Field) for the field offset computation is stored. The call is not directly followed by a field store or by a sign extend node followed directly by a field store.
Warning: RecomputeFieldValue.FieldOffset automatic field value transformation failed. The automatic registration was attempted because a call to sun.misc.Unsafe.objectFieldOffset(Field) was detected in the class initializer of com.alibaba.fastjson2.writer.ObjectWriterImplMap. Detailed failure reason(s): The argument of sun.misc.Unsafe.objectFieldOffset(java.lang.reflect.Field) is not a constant value or a field load that can be constant-folded., Could not determine the field where the value produced by the call to sun.misc.Unsafe.objectFieldOffset(Field) for the field offset computation is stored. The call is not directly followed by a field store or by a sign extend node followed directly by a field store.
Warning: RecomputeFieldValue.FieldOffset automatic field value transformation failed. The automatic registration was attempted because a call to sun.misc.Unsafe.objectFieldOffset(Field) was detected in the class initializer of com.alibaba.fastjson2.writer.ObjectWriterImplMap. Detailed failure reason(s): The argument of sun.misc.Unsafe.objectFieldOffset(java.lang.reflect.Field) is not a constant value or a field load that can be constant-folded., Could not determine the field where the value produced by the call to sun.misc.Unsafe.objectFieldOffset(Field) for the field offset computation is stored. The call is not directly followed by a field store or by a sign extend node followed directly by a field store.

Environment:

• OS: RHEL 9 (quay.io/quarkus/ubi9-quarkus-mandrel-builder-image:jdk-21)
• JDK: Openjdk-21.0.5+11
• Fastjson2 and codegen: 2.0.59
• Quarkus: 3.28.4

I don't know if it causes any problem at runtime, but apparently needs to be fixed.

Similar ticket: https://github.com/alibaba/fastjson2/issues/3108