public ResolvedJavaType lookupJavaType(Constant constant) {
if (constant.isNull() || !(constant instanceof HotSpotObjectConstant)) {
return null;
}
Object o = HotSpotObjectConstant.asObject(constant);
return HotSpotResolvedObjectType.fromClass(o.getClass());
}
@Override
public long getMemorySize(Constant constant) {
if (constant.getKind() == Kind.Object) {
HotSpotResolvedObjectType lookupJavaType =
(HotSpotResolvedObjectType) this.lookupJavaType(constant);
if (lookupJavaType == null) {
return 0;
} else {
if (lookupJavaType.isArray()) {
// TODO(tw): Add compressed pointer support.
int length = Array.getLength(HotSpotObjectConstant.asObject(constant));
ResolvedJavaType elementType = lookupJavaType.getComponentType();
Kind elementKind = elementType.getKind();
final int headerSize = HotSpotGraalRuntime.getArrayBaseOffset(elementKind);
int sizeOfElement = HotSpotGraalRuntime.runtime().getTarget().getSizeInBytes(elementKind);
int alignment = HotSpotGraalRuntime.runtime().getTarget().wordSize;
int log2ElementSize = CodeUtil.log2(sizeOfElement);
return NewObjectSnippets.computeArrayAllocationSize(
length, alignment, headerSize, log2ElementSize);
}
return lookupJavaType.instanceSize();
}
} else {
return constant.getKind().getByteCount();
}
}