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package com.oracle.svm.core.genscavenge.graal;

import org.graalvm.compiler.nodes.gc.CardTableBarrierSet;
import org.graalvm.compiler.nodes.memory.OnHeapMemoryAccess.BarrierType;

import com.oracle.svm.core.StaticFieldsSupport;

import jdk.vm.ci.meta.JavaKind;
import jdk.vm.ci.meta.ResolvedJavaField;
import jdk.vm.ci.meta.ResolvedJavaType;

Static fields in SVM are represented as two arrays in the native image heap: one for Object fields and one for all primitive fields (see StaticFieldsSupport). Therefore, we must emit array write barriers for static fields. /**
 * Static fields in SVM are represented as two arrays in the native image heap: one for Object
 * fields and one for all primitive fields (see {@link StaticFieldsSupport}). Therefore, we must
 * emit array write barriers for static fields.
 */
public class SubstrateCardTableBarrierSet extends CardTableBarrierSet {
    public SubstrateCardTableBarrierSet(ResolvedJavaType objectArrayType) {
        super(objectArrayType);
    }

    @Override
    public BarrierType fieldStoreBarrierType(ResolvedJavaField field, JavaKind storageKind) {
        if (field.isStatic() && storageKind == JavaKind.Object) {
            return arrayStoreBarrierType(storageKind);
        }
        return super.fieldStoreBarrierType(field, storageKind);
    }
}